The People v. Davis CA1/2

Filed 9/12/13 P. v. Davis CA1/2
Opinion following remand from Supreme Court
NOT TO BE PUBLISHED IN OFFICIAL REPORTS
California Rules of Court, rule 8.1115(a), prohibits courts and parties from citing or relying on opinions not certified for
publication or ordered published, except as specified by rule 8.1115(b). This opinion has not been certified for publication
or ordered published for purposes of rule 8.1115.

IN THE COURT OF APPEAL OF THE STATE OF CALIFORNIA

FIRST APPELLATE DISTRICT

DIVISION TWO

THE PEOPLE,
Plaintiff and Respondent,
A120428
v.
JOHN DAVIS, (San Francisco County
Super. Ct. No. 190226)
Defendant and Appellant.

I. INTRODUCTION
A jury found John Davis guilty of murder (Pen. Code, § 1871) and also found true
special circumstance allegations that the murder was committed in the course of rape and
burglary (§§ 190.2, subd. (a)(17)(C) & (G)). Davis was sentenced to life in prison
without parole.
On appeal, Davis contends the judgment must be reversed and a new trial ordered
because: (1) the jury conducted an unauthorized experiment; (2) the trial court excluded
scientific material relevant to the prosecution’s DNA evidence; (3) the jury was told that
Davis exercised his Miranda2 rights during a police interview; (4) the prosecutor misled
the jury during closing argument; and (5) Davis was denied his constitutional right to
confront witnesses against him.

1
Statutory references are to the Penal Code unless otherwise indicated.
2
Miranda v. Arizona (1966) 384 U.S. 436 (Miranda).

1
 In a decision filed September 14, 2010, this court found that juror misconduct and
multiple violations of Davis’s constitutional right to confrontation required us to reverse
the judgment and remand this case for a new trial. Thereafter, the People filed a petition
for review and, on December 21, 2010, the California Supreme Court granted the
People’s petition but deferred taking further action in this case pending consideration and
disposition of cases already before the court which involved the federal constitutional
right to confrontation. (People v. Davis (Dec. 21, 2010) 2010 Cal. LEXIS 13302
(S187515).)
On May 22, 2013, the Supreme Court issued another order transferring this case
back to this court with instructions to vacate our September 2010 decision and to
reconsider the cause in light of four cases: Williams v. Illinois (2012) ___ U.S. ___ [132
S.Ct. 2221] (Williams); People v. Lopez (2012) 55 Cal.4th 569 (Lopez); People v. Dungo
(2012) 55 Cal.4th 608 (Dungo); and People v. Rutterschmidt (2012) 55 Cal.4th 650
(Rutterschmidt). (People v. Davis (May 22, 2013) 2013 Cal. LEXIS 4431 (S187515).)
The four new cases we have been instructed to consider are relevant to only one of
the many claims of error advanced on appeal: Davis’s contention that he was denied his
constitutional right to confront witnesses against him. Therefore, we adopt without
change and reaffirm in this opinion the parts of our September 2010 opinion that do not
pertain to Davis’s constitutional right to confrontation. In the final part of this opinion,
we reconsider Davis’s confrontation claim. As we will explain, the 2012 cases listed
above support the conclusion that Davis was denied his constitutional right to confront
witnesses against him.
II. STATEMENT OF FACTS
A. The December 1985 Murder
On December 4, 1985, at approximately 8:30 p.m., Bobby Adams went to meet his
girlfriend, Barbara Martz, at her home at 1510 25th Street in the Potrero Hill district of
San Francisco. Adams found the front door to the house open and Martz lying dead on
the floor inside. Martz was nude and had been stabbed and cut several times. The police

2
found a blood stained knife that had been taken from Martz’s kitchen on a walkway
between her house and the street.
An autopsy was performed by a Dr. Duazo whose report stated that Martz died
from loss of blood due to multiple stab wounds. According to the autopsy report, sperm
were found in smears taken from Martz’s vagina and perineal area. Bruising on the
victim’s arms and legs was consistent with a struggle. Swabs with blood and sperm
recovered from Martz’s body were placed in a sealed envelope and stored in a freezer at
the San Francisco Medical Examiner laboratory.
In July 1986, a teenager went into the basement of a public housing project located
at 1626 25th Street in San Francisco, in search of his younger relatives. In this
underground play area, which neighborhood kids referred to as the “shack,” the boy
found credit cards that belonged to Martz. He turned them into the police and then
showed the officers the shack, where they recovered Martz’s purse and wallet.
B. The 2002 Investigation
In 2002, the Martz homicide file was assigned to San Francisco Police Investigator
James Spillane who reopened the case to determine if there was evidence that could be
submitted for DNA analysis. Shortly thereafter, Spillane took possession of the envelope
of evidence collected during Martz’s autopsy from the San Francisco Medical
Examiner’s office.
1. The 2002 DNA Testing
In March 2002, Dr. Cydne Holt, supervisor of the DNA section of the Forensic
Division of the San Francisco Police Department, received a lab request from Spillane to
analyze the Martz autopsy evidence. From the vaginal swabs that were collected during
the autopsy, Holt generated a DNA profile of the contributor of the sperm sample (the
DNA donor profile).
Using a process called differential extraction, Holt isolated a “clean” single-source
sperm cell fraction from the swabs. She then used a procedure called polymerase chain
reaction (PCR) to generate the DNA donor profile by focusing on specific DNA locations
on the cell sample. Loci is a scientific term for a specific location on a chromosome

3
which contains short tandem repeat (STR) strands of DNA that have been identified as
useful for DNA profiling. In this case, Holt used the PCR method to (1) locate STR
strands at nine specific loci, (2) amplify just those areas, and (3) assign a type to those
areas by means of a computer program which then generated a string of numbers that
comprised the DNA profile.
In June 2002, the DNA donor profile was loaded into the California State
Combined DNA Index System (CODIS) database and, a few months later, the computer
reported a match with a DNA sample from Davis that had been loaded into the database
as an administrative consequence of a prior robbery and burglary conviction. (See § 295,
et seq.) Police investigators used the database match to obtain a warrant pursuant to
which they collected a DNA sample from Davis on October 10, 2002.
Bonnie Cheng, a criminalist at the Forensic Division of the San Francisco Police
Department, used the PCR process to analyze Davis’s DNA and develop his DNA
profile. Cheng concluded that Davis’s DNA profile matched the DNA donor profile that
Holt had generated from the autopsy sperm sample at all nine loci.
2. The December 2002 Interview
In December 2002, Officer Spillane interviewed Davis who was in prison at the
time. Spillane told Davis that he was looking into an old case and wanted to “rule people
in or rule people out as the suspects.” Davis agreed to talk with Spillane and was read
and waived his Miranda rights. In response to questioning, Davis said that he grew up in
the Potrero Hill area of San Francisco, that his address was 1710 25th Street and that he
had family who still lived there.
Using Polaroid photographs for orientation, Spillane explained to Davis that the
police had found some property under the foundation of a building near the building
where Davis grew up. He then showed Davis pictures of Martz’s purse and wallet and
asked if he had seen them before. Davis responded that he had not. Spillane said the
items were found a long time ago and asked if there was any chance Davis might have
seen them. Davis responded that “[i]t’s possible” and said that the wallet looked “kinda
familiar.” Davis confirmed that, when he lived in that area, he and his friends used to go

4
into the underground areas of those buildings, that they would make forts out there, and
that they found all kinds of things under there, like syringes, beer cans, knives, a gun, and
that they once found a machete. Spillane asked if there was any chance that Davis may
have touched the purse or wallet that were depicted in the photographs. At first, Davis
said he did not think so. But, then Davis admitted that if he had found the wallet when he
was a kid, he probably would have opened it and that it was possible that happened.
Spillane then showed Davis several pictures of Martz’s building, both inside and
out. Davis said he recognized the building but then repeatedly denied that he ever
burglarized that house. Then Spillane showed Davis several pictures of Martz and asked
whether he had ever seen that woman before. Davis said he had not. When Spillane said
that Martz had lived in the house depicted in the other photographs, Davis seemed
surprised that a white woman lived in that neighborhood. Davis repeatedly stated that he
did not recognize the woman at all. Spillane asked if Davis had had a conversation with
the woman 17 years prior, in 1985, would he remember it. Davis said he did not know,
but that she did not look familiar to him.
Spillane then asked Davis several questions about his sexual partners in 1985. At
one point, Davis said “What is this all about?” to which Spillane responded: “This
woman lived in this house in 1985 and on December the 4th of that year, she was raped
and murdered in her home.” Spillane also said that the “problem” was that the semen
from the rapist had been “DNA tested” and that it matched Davis. Davis responded “Oh
hell no.”
Spillane shared his hypothesis that Davis went into Martz’s house that day with
the intent to do a burglary, that he was surprised and scared when the woman came home,
which was understandable, and that he took the knife from her kitchen just to scare her so
he could get out. Spillane said he had to go to the District Attorney, but that he wanted to
first give Davis a chance to tell his side of the story. Davis said he did not have a side of
the story because it wasn’t him and that was all he could say. Davis repeatedly stated that
he did not rape anyone. Spillane suggested that Davis had been carrying a “kind of a
poison” around with him, that he thought Davis was remorseful and felt badly and that

5
the woman’s family needed closure. Davis responded: “I ain’t got no more to say to you
‘til I can get an attorney, you know. This is fucked up.”
C. The Case Against Davis
An August 12, 2003, three-count indictment charged Davis with murder with
special circumstances, rape and burglary. Shortly thereafter, the rape and burglary
charges were dismissed on the ground that the statute of limitations had expired.
In 2005, Bonnie Cheng reanalyzed both the sperm-cell sample from the Martz
autopsy and Davis’s October 2002 DNA sample. Again using the PCR method, Cheng
examined four additional STR strands in the samples so that the results could be
combined with the earlier test results to generate 13-locus DNA profiles. Cheng then
determined that the 13-locus donor profile and the 13-locus Davis profile matched at all
13 locations.3
A jury trial commenced August 6, 2007. The Martz autopsy report was admitted
into evidence as a business record, although Dr. Duazo did not appear at trial. Dr. Amy
Hart, the San Francisco Medical Examiner at the time of trial, testified about the autopsy
that Dr. Duazo performed, about the evidence that was recovered and preserved during
that autopsy and about the victim’s injuries and cause of death.
Officer Spillane testified about his December 2002 interview with Davis and an
audiotape recording of that interview was played for the jury. Thereafter, the prosecutor
asked Spillane several questions about the interview and his investigation of this case.
During that questioning, Spillane stated that, at some point “apart from the interview”

3
Holt testified at trial that Cheng performed this additional testing because of a
“desire to develop more information.” According to Holt, experts have identified 13 loci
which are particularly useful for DNA typing. In this case, the PCR testing that was
performed in 2002 was done with a Profiler Plus kit which isolates nine STR strands at
nine loci on the DNA sample. Then, in 2005, Cheng used a Cofiler kit to look at the
additional four STR strands at four other loci on the samples.

6
that was played for the jury, Davis reported that he lived at 1710 25th Street during the
time period in late 1985 to early January 1986.4
Spillane testified that 1620-1638 25th Street, the complex where Martz’s purse
and credit card were found, is located in between Davis’s former residence at 1710 25th
Street and Martz’s former residence at 1510 25th Street. Spillane testified that he walked
from the former Davis residence to the buildings where the property was recovered in
approximately 70 seconds and from there to the former Martz residence in 35-40 seconds,
completing the entire trip at a normal walking pace in “about just under two minutes.”
Spillane also testified that he obtained information about Davis’s brothers as part
of his investigation, but that he did not speak with them or any of Davis’s family.
Spillane confirmed that Davis has four brothers, two older and two younger than him, and
that they all used their mother’s maiden name as their last name, which was not Davis.5
During the trial in this case, the court permitted the jury to ask questions of the
witnesses. At the conclusion of Spillane’s testimony, a juror inquired whether Spillane
had obtained a DNA reference sample from anyone other than Davis. Spillane responded
that he had not.

4
On appeal, Davis contends that there was no evidence regarding his place of
residence at the time of the murder. However, he overlooks the following colloquy from
Spillane’s testimony:
“Q. Did Mr. Davis report to you his address at that time period in late 1985 to
early January 1986?
“A. Yes.
“Q. What was the address?
“A. 1710 25th Street.
“Q. That was apart from the interview that we heard?
“A. Yes.”
5
Contrary to the People’s assumption/contention, this testimony by Spillane does
not establish that Davis’s brothers were half-brothers. We have not located any evidence
to warrant that assumption.

7
 The prosecution introduced its DNA evidence through the testimony of Dr. Holt
who, by that time, was the Director of the San Francisco Police Department’s Forensic
Services Division. Holt testified about the DNA testing she performed in 2002 and also
about the tests that Bonnie Cheng conducted in 2002 and 2005. Cheng did not testify at
trial. Holt told the jury that the 13-locus DNA donor profile and the 13-locus Davis
profile matched.
Holt also testified that Bonnie Cheng had performed a statistical analysis which
established that the probability that a “random unrelated person” would by chance
possess the same male DNA profile detected on the sperm fractions recovered during the
autopsy was “one in seven quintillion for U.S. Caucasians, one in 25 quadrillion for
African-Americans, one in 52 quintillion for California Hispanics, and one in 99
quintillion for the general Asian population.”
The trial judge asked Holt the following question, which had been asked by a
member of the jury: “If Dr. Holt were able to test Mr. Davis’ brother’s DNA, would she
expect to see matches, and if so how, approximately how many markers or loci?” Holt
gave the following response: “I can’t say absolute numbers for that. I can say that the
amount of similarity between siblings is expected to be closer than between unrelated
people. I can say that the amount of similarity between full sibling, meaning both
biological parents are the same, would be higher than between siblings where only one
parent is shared. [¶] And I don’t know particulars here necessarily, so I can’t say the
number that is likely. I mean those could be estimated, but I haven’t done that type of
statistical analysis in this case.”
The jury began deliberations on August 17, 2007, and returned a verdict on
August 27, finding Davis guilty of murder and that both special circumstance allegations
were true. The trial court denied a motion for new trial and sentenced Davis to life in
prison without parole.

8
 III. DISCUSSION
A. Jury Misconduct
1. Issue Presented and Standard of Review
In his motion for a new trial, Davis argued, among other things, that the jury
committed misconduct during deliberations by using evidence from outside the record
and the expertise of one particular juror to calculate the likelihood that one of Davis’s
brothers matched the 13-locus DNA donor profile. In this court, Davis contends that the
lower court erred by denying him a new trial on this ground.
“The trial court is vested with broad discretion to act upon a motion for new trial.
[Citation.] When the motion is based upon juror misconduct, the reviewing court should
accept the trial court’s factual findings and credibility determinations if they are
supported by substantial evidence, but must exercise its independent judgment to
determine whether any misconduct was prejudicial.” (People v. Dykes (2009) 46 Cal.4th
731, 809.)
In the present case, it appears that the trial court did not make any factual findings
or credibility determinations. Indeed, we have been unable to confirm that the court
conducted a hearing regarding the alleged misconduct before it denied the motion for
new trial. We do have before us, however, pleadings and declarations relating to the
juror misconduct motion, all of which were filed under seal in the lower court and
subsequently unsealed by order of this court. We assume, absent evidence or any
contention to the contrary, that the trial court considered these declarations in reaching its
conclusion that no prejudicial misconduct occurred.6

6
Portions of the juror declarations that pertained to statements made or conduct
that occurred in the jury room were admissible under Evidence Code section 1150,
subdivision (a). Those statements “are evidence of objectively ascertainable overt acts
that are open to sight, hearing, and the other senses and are therefore subject to
corroboration.” (People v. Steele (2002) 27 Cal.4th 1230, 1259-1267 (Steele).)

9
 2. The Juror Declarations
Davis’s evidence that an improper experiment was performed consisted of the
declaration of a juror we refer to herein as C.D.7
C.D. stated that “[a] number of jurors mentioned that they were troubled that no
calculation of the likelihood of a brother of John Davis being the source of the sperm was
made,” and that several jurors attempted to calculate that likelihood, some of whom used
their calculators. According to C.D., one juror shared his opinion, which was based on
his “own personal medical experience,” that whatever the odds were that a brother was a
match, “it was a very large number.” This juror gave the others “a lot of information
about genetics that had not been discussed in trial.” The jury used this information and
their own personal experience to discuss “statistical experiments” that could be done to
address the concern of several jurors that there was no independent evidence regarding
the likelihood of a match with a brother.
C.D. also stated that one juror calculated the odds of a brother being a match as
one in eight million and told the others that this was a conservative estimate. According
to C.D., “[i]n the end, we chose the one-in-eight million calculation as the “best estimate
we could come up with for use in our deliberations.”
In its opposition to the new trial motion, the prosecution argued that “[a]lthough
jurors did estimations of the likelihood of a brother having the same DNA profile as
Defendant, these actions do not rise to the level of misconduct recognized by the courts.”
It reasoned that the jury calculations were proper because they did not utilize extrinsic
evidence but based their estimates on evidence presented at trial. The prosecution
attempted to support this claim with declarations from several jurors.
All of the jurors who submitted declarations in this case confirmed that the jury
spent time discussing the likelihood that one of Davis’s brothers might share his DNA
profile, although many downplayed the significance of this issue and insisted that the
calculations were based on the evidence presented at trial.

7
For privacy sake, we will refer to jurors by their initials rather than their names.

10
 Juror P.F. disclosed in his declaration that he proposed a formula to the jury for
calculating the likelihood that a brother might have the same DNA profile as Davis.
P.F.’s juror questionnaire, which is part of the appellate record, reflects that he is a
psychology professor with a medical degree.
In his declaration, P.F. stated that he used the “fact that we inherit one allele from
our mother and one allele from our father at each of the 13 locations” to formulate the
expression of “1/4 to the 13th power.” P.F. stated that he then “did simple multiplication
by hand in the jury deliberation room in front of my fellow jurors (1/4 times 1/4 times 1/4
times 1/4 . . .).” P.F. recalled that he described his estimate to other jurors as
conservative, although he never referred to it as the best estimate.
P.F also explained that he proposed this formula after he failed to dissuade a
particular juror from speculating that if defendant had a brother, that brother might have
the same DNA profile. P.F. stated that he “addressed this juror’s speculation using high
school level biology and high school level math to estimate for this juror the likelihood of
a hypothetical brother with the same mother and father as the defendant having the same
13 loci profile as John Davis.”
Other jurors from whom the prosecution obtained declarations made statements to
the effect that the jury accepted P.F.’s formula as valid and that they used it to calculate
the likelihood of brothers with matching DNA. For example, juror J.A. stated that “we
did a numerical calculation based on the evidence at trial to estimate the chances of a
brother having the same DNA,” and that “several of us” did the calculation by hand “after
we realized that the calculators on our phones would not work for this calculation.”
Another juror, N.L., stated: “Since no statistical information was giving [sic] on
the chances of two brothers matching at all 13 locations, we used the trial testimony that
a person inherits one of their mother’s two alleles and one of their father’s two alleles at
each location. This gives a 1 in 4 chance that the brothers would have a match at any one
location. We then multiplied that number to the 13th power since there were 13 locations
tested. I remember the result of the calculation being around either 1 in 8 million or 1 in
16 million. I do not recall any juror using a calculator.”

11
 Some jurors also acknowledged that one or two of the jurors shared specialized
knowledge during deliberations. Juror P.S. stated that there was a doctor and a nurse on
the jury, “but they did not bring their independent knowledge to bear on the
deliberations—other than clarification of the evidence.” Juror J.S. stated that “[t]here
were jurors with specialized knowledge in various fields that applied to the case. While
they did use their expertise to analyze certain evidence presented at trial, at no time did
any of the jurors express an opinion based on specialized information obtained from
outside sources alone.”
3 Analysis
“It is not improper for a juror, regardless of his or her educational or employment
background, to express an opinion on a technical subject, so long as the opinion is based
on the evidence at trial. Jurors’ views of the evidence, moreover, are necessarily
informed by their life experiences, including their education and professional work. A
juror, however, should not discuss an opinion explicitly based on specialized information
obtained from outside sources. Such injection of external information in the form of a
juror’s own claim to expertise or specialized knowledge of a matter at issue is
misconduct. [Citations.]” (In re Malone (1996) 12 Cal.4th 935, 963 (Malone).)
In Malone, the court found that a juror in a murder trial committed misconduct by
expressing to her fellow jurors “negative opinions on the reliability of petitioner's
polygraph evidence, based on her own professional study of psychology.” (Malone,
supra, 12 Cal.4th at p. 963.) The court acknowledged that statements by this juror which
merely reflected the evidence and argument presented at trial were “less egregious,” but
nevertheless found that the juror’s assertion that her views were “drawn from her own
professional knowledge . . . was an improper injection of extrajudicial specialized
information into the deliberations.” (Id. at p. 963, fn. 16.)
In contrast to Malone, there was no improper injection of extrajudicial specialized
information into the jury deliberations in Steele, supra, 27 Cal.4th at pages 1259, 1265-
1267. Steele was a death penalty case in which appellant contended that four jurors with
experience in the military and in Vietnam committed misconduct by offering their

12
expertise to the other jurors. The Steele court disagreed, finding that the views that were
allegedly shared by the jurors in question “were not contrary to, but came within the
range of, permissible interpretations” of the evidence presented at trial regarding
appellant’s military training and experience in Vietnam and its potential effect on his
crimes. (Id. at p. 1266.)
The Steele court reasoned that there was extensive trial evidence pertaining to
these issues, much of which was “susceptible to various interpretations.” (Steele, supra,
27 Cal.4th at p. 1266.) The court found that “[a]ll the jurors, including those with
relevant personal backgrounds, were entitled to consider this evidence and express
opinions regarding it.” (Ibid.) As the Steele court explained, “it would be an impossibly
high standard to permit these jurors to express an opinion on this evidence without
relying on, or mentioning, their personal experience and background.” (Id. at p. 1267.)
The court also acknowledged, however, that “[a] fine line exists between using one’s
background in analyzing the evidence, which is appropriate, even inevitable, and
injecting ‘an opinion explicitly based on specialized information obtained from outside
sources,’” which constitutes misconduct under Malone, supra, 12 Cal.4th at page 963.
(Steele, supra, 27 Cal.4th at p. 1266.)
Applying these principles to the present case, we conclude misconduct occurred.
There is no dispute that the jury performed a calculation in order to estimate the
likelihood of a DNA match among brothers. Furthermore, the evidence clearly shows
that the jurors used a formula to conduct this calculation that was not part of the evidence
presented at trial. That formula was supplied to the jury by one of its members, juror
P.F., who had specialized knowledge and expressly identified himself as a specialist to
his fellow jurors. Indeed, P.F. admitted that he shared his formula with the other
members of the jury for the express purpose of dissuading them from “speculating” as to
whether a brother might have perpetrated these crimes. This was not simply an
interpretation of ambiguous evidence, as occurred in Steele, but an injection of extrinsic
evidence by a specialist.

13
 The People contend that there was no misconduct because the jury relied solely on
the trial evidence and their own general knowledge to estimate the possibility that one of
Davis’s four brothers shared his DNA profile. This contention is simply not supported by
the record before us. Several jurors, including, P.F., stated that the jury used the trial
evidence that a person inherits one of their mother’s two alleles and one of their father’s
two alleles at each loci. However, this particular piece of evidence was not the formula
that the jury used to calculate the likelihood that brothers’ DNA would match at the 13-
loci that were tested in this case. That formula was supplied to the jury by one of its
members, not by a trial witness.
In other words, in contrast to the situation in Steele, juror P.F. did not simply use
his specialized knowledge to interpret the trial evidence. Rather, he used it to construct a
formula that had no support in the trial record. His formula filled an evidentiary void that
was expressly acknowledged by the prosecution’s expert witness, Dr. Holt. As reflected
in our foregoing factual summary, Dr. Holt testified that it was possible to estimate the
likelihood of a matching DNA profile among brothers, but that she did not perform that
analysis in this case.
4. Prejudice
“A juror’s misconduct raises a presumption of prejudice, which may be rebutted
by proof no prejudice actually resulted. [Citations.] ‘A judgment adverse to a defendant
in a criminal case must be reversed or vacated “whenever . . . the court finds a substantial
likelihood that the vote of one or more jurors was influenced by exposure to prejudicial
matter relating to the defendant or to the case itself that was not part of the trial record on
which the case was submitted to the jury.” [Citations.] . . . [¶] “The ultimate issue of
influence on the juror is resolved by reference to the substantial likelihood test, an
objective standard. In effect, the court must examine the extrajudicial material and then
judge whether it is inherently likely to have influenced the juror.” ’ [Citation.] (Malone,
supra, 12 Cal.4th at pp. 963-964.)
“ ‘Such “prejudice analysis” is different from, and indeed less tolerant than,
“harmless-error analysis” for ordinary error at trial. The reason is as follows: Any

14
deficiency that undermines the integrity of a trial—which requires a proceeding at which
the defendant, represented by counsel, may present evidence and argument before an
impartial judge and jury—introduces the taint of fundamental unfairness and calls for
reversal without consideration of actual prejudice. [Citation.] Such a deficiency is
threatened by jury misconduct. When the misconduct in question supports a finding that
there is a substantial likelihood that at least one juror was impermissibly influenced to the
defendant’s detriment, we are compelled to conclude that the integrity of the trial was
undermined: under such circumstances, we cannot conclude that the jury was impartial.
By contrast, when the misconduct does not support such a finding, we must hold it
nonprejudicial.’ [Citations.]” (Malone, supra, 12 Cal.4th at p. 964.)
The Malone court found that the prosecution rebutted a presumption of prejudice
resulting from the fact that a juror injected specialized knowledge regarding polygraph
evidence into the deliberations by “showing the externally derived information was
substantially the same as evidence and argument presented to the jury in court.” (12
Cal.4th at p. 964.) As the court explained, “Because [the juror’s] assertions were
substantially the same as evidence and argument presented at trial, her error was much
less egregious than similar misconduct we have found warranted reversal. [Citations].
Viewed in context of the evidence at trial, the misconduct here does not support a finding
that at least one juror was improperly influenced to petitioner’s detriment. (Id. at p. 965.)
In the present case, the formula proposed by juror P.F. and adopted by the jury
during deliberations was not substantially the same as evidence presented at trial. Rather,
as discussed above, the formula was proposed and adopted in order to fill an evidentiary
void with respect to an issue that the jurors expressly identified as relevant to their
deliberations. Furthermore, the juror declarations compel the conclusion that at least one
juror, and likely many more than that, were improperly influenced by the misconduct to
Davis’s detriment.
The People argue the misconduct that occurred in this case should be overlooked
for two reasons. First, they contend that the entire matter was simply irrelevant. The
People reason that, since there was absolutely no evidence that a brother was responsible

15
for these crimes, the jury’s experiment could not have prejudiced Davis. However, the
evidence regarding Davis’s brothers, though brief, was not irrelevant and it
unquestionably had an impact on this jury. As reflected above, one juror asked Officer
Spillane whether other DNA profiles had been tested. There was also a question from a
juror as to whether the prosecution’s DNA expert had calculated the likelihood of a DNA
match among brothers. The prosecution’s tactical decision not to explore or more fully
address these issues at trial certainly cannot be used to render them irrelevant.
Alternatively, the People argue that Davis was not prejudiced because the jury
over-estimated the likelihood of a DNA match between brothers and, thus, the
unauthorized experiments inured to Davis’s benefit. Not surprisingly, Davis’s appellate
counsel argues the opposite is true, i.e., that the jury under-estimated the likelihood that
brothers could having matching DNA.
As we have already established, the trial record does not contain any evidence
regarding the likelihood that one of Davis’s brothers matched his DNA. Nevertheless,
both parties spend significant time proposing and defending formulas for making that
calculation. At least Davis’s appellate counsel attempts to ground his proposed formula
in the record of pre-trial proceedings pertaining to the DNA evidence, which is before us
on appeal. The People, by contrast, base their analysis on scientific reports and theories
that were never presented to the lower court and that are not a part of the appellate record.
For this reason, Davis has moved to strike the People’s analysis from their appellate brief.
The People attempt to justify their decision to provide this court with what they
characterize as “the correct formulae, and variables to insert into those formulae” by
pointing out that they provided citations to the formulae and data “which are readily
accessible as public, published materials.”
We would be inclined to grant the motion to strike if not for the fact that the
competing formulas and analyses proposed by these parties on appeal reinforce our
conclusion that Davis was prejudiced by the unauthorized jury experiment. The parties’
lengthy and complex discussions undermine the People’s efforts to characterize the jury’s
unauthorized experiment as nothing more than a high school level math problem. Like

16
appellate counsel on both sides of this case, the jury went outside the trial record for an
answer they believed was relevant to the question of guilt. The resulting prejudice to
Davis requires a reversal of this judgment.
B. Evidence Pertaining to the Arizona Database
Davis contends the trial court erred by excluding evidence of a report titled
“Arizona Nine Plus Locus Match Summary Report” (the Arizona Report).
1. Background
a. The Arizona Report
In or around July 2005, Bicka Barlow, a deputy public defender in the San
Francisco Public Defender’s officer, filed a declaration in this case, seeking issuance of
an out-of-state subpoena. In her declaration, Barlow explained that she had become
aware that an employee of the Convicted Offender Section of the Arizona Department of
Public Safety had discovered multiple instances in which a pair of individuals whose
DNA samples were included in the Arizona Database matched each other at nine of
thirteen loci. Barlow stated that she had contacted that employee and requested that she
“memorialize her findings” in a letter. That request was declined. After consulting
experts, Barlow had concluded that the Arizona data was relevant to this case because,
among other things, it would “demonstrate the fallibility of the statistical calculations”
that were done by the San Francisco Crime laboratory.
On August 24, 2005, the Honorable Mary Morgan, judge of the San Francisco
Superior Court, issued a certificate for the production of out-of-state documents (see
§ 1334) requesting that a judge of the superior court for the State of Arizona, Maricopa
County, issue an order directing the custodian of records of the Arizona Department of
Public Safety, DNA Data Base Unit, to produce documents in this case including
“[r]ecords of any matches within the Arizona state convicted offender database between
two individuals of nine (9) or more loci within the thirteen (13) loci tested using Profiler
Plus and Cofiler kits or the fifteen (15) locus Identifier kit.” On September 22, the
Honorable James H. Keppel of the Maricopa County Superior Court acted upon Judge

17
Morgan’s Certificate by issuing an order to show cause to the custodian of records of the
Arizona Department of Public Safety, Product Documents/DNA Database Unit.
The custodian of records in Arizona produced the Arizona Report to the defense in
this case. Although characterized as a report, the five-page document is a spread sheet of
data unaccompanied by substantive analysis or any written explanation. The following
statement appears at the bottom of each page of this report: “Prepared as a special report
by court order. This report is not generated for or used by the Arizona Department of
Public Safety Crime Laboratory for any statistical analyses. This report is property of the
Arizona Department of Public Safety. Use of this document beyond the limitation of the
court order by Judge Keppel is not authorized.”
b. The Discovery Motion
The defense used the Arizona Report as support for a pre-trial motion to discover
the California database that first identified Davis as a match to the DNA donor profile.
Bicka Barlow testified on behalf of the defense at the discovery hearing. Barlow, who
has a background in genetics, identified herself as an attorney-consultant to the defense in
this case. Barlow testified that the Arizona Report showed that a study of the Arizona
database of 65,000 people, produced 122 pairs of people who had DNA that matched at
nine loci, 20 pairs of people who matched at 10 loci, one pair of people who matched at
11 loci, and one pair, who turned out to be siblings, who matched at 12 loci. Barlow
testified that many experts in the field believed that the Arizona Study cast doubt on the
validity of the random match probability methodology that was used in this case. She
further testified that many experts believed they would find a 13-loci match among
unrelated individuals in the California Database if they had access to it. At the
conclusion of the lengthy discovery proceeding, Judge Morgan denied the defense motion
to discover the California Database. That ruling is not at issue in this appeal.
c. Dr. Holt’s Trial Testimony
Before the prosecutor called Dr. Holt to testify, she moved to prohibit the defense
from questioning Holt about the Arizona Report. She argued the report was irrelevant
and unduly prejudicial under Evidence Code section 352. The defense maintained that

18
the report was relevant because it undermined or at least called into question the
reliability of the so-called “product rule,” which was used to calculate the statistical
likelihood of a random match between Davis and the DNA donor profile. The trial court
took the matter under submission and proceeded with the trial. Thereafter, the court
interrupted Dr. Holt’s trial testimony in order to conduct an Evidence Code section 402
hearing.
During the section 402 hearing, defense counsel cross-examined Holt about the
Arizona Report outside the presence of the jury. Counsel stated that he had sent Holt a
copy of the report and asked whether she had looked at it. Holt responded that she had
not. Holt testified that she had heard of the Arizona Report, but that she had not seen or
read it and that she could not authenticate the document that defense counsel showed her.
During questioning by the prosecutor, Holt testified that she was not aware of any study
that concluded the Arizona Report cast any doubt on the reliability of the “product rule”
methodology that was used to calculate the random match probability statistics in this
case. The defense stipulated that the product rule was generally accepted in the scientific
community.
Defense counsel then asked Holt to review the Arizona Report “between now and
Monday morning.” The prosecutor objected and the trial court responded it would not
“allow” that. The court explained: “As I indicated off the record, I think that what you
really need to do is to bring in your own expert. This witness has not reviewed, relied
upon, considered the information that you had asked her to. She did not, she is not basing
her opinion on it in any way. And in order to get this testimony in, I believe that you’re
gonna need to bring in your own expert.”
Thereafter, the defense called its “investigator” in this case, Bicka Barlow, to
testify as an expert on the “intersection of the legal field and DNA evidence in the
courtroom . . . .” Barlow has a masters degree in genetics and developmental biology and
a law degree, and has previously been employed as a consultant expert in numerous
criminal cases. She does not purport to be nor has she ever been qualified as an expert in
the field of population genetics as it relates to human forensic identification.

19
 Barlow testified that the Arizona Report consists of a “set of data” that can be and
has been analyzed by experts who conduct statistical interpretation of DNA data. She
also testified that experts had concluded that the Arizona Report undermines the
established scientific procedures used to calculate population frequency statistics for
human forensic DNA profiles. Barlow admitted, however, that she was not an expert in
that area.
As the trial day drew to a close, the court indicated that it was “not impressed” by
Barlow’s testimony thus far. Defense counsel responded that his other expert was in
Southern California and that it would be impossible to have him in court by the following
Monday morning. Defense counsel suggested that he could ask Barlow to communicate
with the other expert and obtain a detailed declaration from him. The court responded
that there would need to be an opportunity to cross-examine the expert and the problem
was that the defense had failed to lay a proper foundation for the Report. Thereafter, the
defense elicited additional testimony from Barlow about the content of the Arizona
Report, but it did not produce another expert.
After the matter was submitted, the trial court ruled that “the study is not relevant
in this particular case and any discussion or testimony through Ms. Holt, particularly
would only . . serve to confuse the jury, would constitute an undue consumption of time
and under [Evidence Code section] 352, it will . . . not be referred to or provide the basis
of any questioning to Ms. Holt.” The court reiterated that Dr. Holt had not referred to,
considered or relied on the Arizona Report in formulating her opinions and that the report
had not otherwise been established as a reliable publication. On its face, the court found,
the document appeared unreliable because it was prepared during the course of some
other litigation. Furthermore, the court found it was inappropriate for Barlow to act as
co-counsel, investigator and also an expert witness in the same proceeding and that it
would not give her testimony much weight.
When defense counsel argued that it should have wide attitude to cross-examine
Holt, the court responded that the defense was attempting to “boot strap” by getting an
irrelevant summary before the jury. The court clarified that it would not prevent the

20
defense from presenting its own expert, but that it could not get the summary into
evidence through its examination of Dr. Holt.
d. The Mueller Declaration
The day after Dr. Holt completed her trial testimony, the defense sought
clarification of the court’s ruling regarding the admissibility of the Arizona Report.
Outside the jury’s presence, defense counsel stated that it was his understanding from an
off-the-record discussion with the court that the finding that the report was irrelevant
would “preclude the defense from bringing its own witness to affirmatively testify
regarding those matters,” and asked if that was a “fair statement.” The court responded:
“I found based on what you put before me at this time that it is irrelevant, that that
particular study is irrelevant.” The court also reiterated that it was “not excluding you
from presenting an expert witness.” It explained again that, based on the defense
presentation, the court concluded that the report was not relevant. It also reiterated that if
defense counsel believed it could change the court’s mind, it was free to try, outside the
presence of the jury.
The following day, the defense filed a “Declaration of Dr. Laurence Mueller.”
Mueller, a professor of Ecology and Evolutionary Biology at the University of California,
Irvine, stated that he was familiar with the Arizona Report. Mueller further stated that he
had reviewed documentation which led him to conclude that the Arizona Department of
Public Safety searched for DNA matches in its database by using the same 13 loci that
were used to test the evidence in the present case. Furthermore, Mueller stated he had no
reason to question the authenticity of the Arizona Report and that the report ‘is the type
of material that experts in this field generally rely upon.”
Mueller opined that the results of that study “are scientifically relevant to every
case in which DNA evidence is presented in conjunction with the standard Random
Match Probability (RMP) statistical analysis.” He also stated that the study undermined
an essential underlying assumption of the RMP methodology and assessment. Mueller
further stated that he had spoken with several “experts” who agreed with him that the
Arizona Report was relevant and useable for purposes of statistical analysis.

21
 During a break in the trial proceedings, the trial court inquired whether defense
counsel wished to discuss the Mueller declaration which had been filed that morning.
Counsel stated: “I simply want to indicate as the Court knows this witness is down in the
Los Angeles area. So I, given the Court’s rulings and my previous statements, I wanted
to make sure there was a complete record as to what the basis for our requesting to bring
this evidence in.”
The prosecutor objected to the declaration and requested that it not be admitted
into evidence on the ground that she had not had the opportunity to cross-examine
Mueller. Defense counsel responded that he thought the proffer was “perfectly
acceptable” under the circumstances, explaining that “if Dr. Mueller were in San
Francisco we would have him come in. But given the Court’s ruling, it seemed unlikely
since the Court had indicated that the evidence was not relevant—if the Court believes
that this makes it relevant, then I will, we can proceed from there.”
The matter was submitted and the trial court issued the following ruling: “The
Court cannot accept this declaration for the truth of matter asserted. It is hearsay. There
is no cross-examination of the declarant. [¶] The Court did review the document and has
allowed the defense to file it to preserve any issues if there is an appeal. And the Court’s
ruling does not change.”
2. Analysis
In their appellate briefs, the parties spend significant time debating whether the
Arizona Report can properly be used to attack the validity of the statistical methodology
that was used in this case, a methodology which indisputably has been generally accepted
in the scientific community. We will not resolve this debate because questions of
relevance and admissibility simply cannot be answered in a vacuum. The question before
us is not whether the Arizona Report could be relevant, but rather whether relevance and
admissibility were established in this particular case. To answer this question, we
consider the evidence that was before the trial court. We will not analyze or address
evidence that was presented only to Judge Morgan or that the parties have culled from
sources outside this record.

22
 In this particular case, the only method by which the defense attempted to present
evidence of the Arizona Report to this jury was through its cross-examination of Dr. Holt.
Evidence Code section 721, subdivision (b) (section 721(b)) states: “If a witness
testifying as an expert testifies in the form of an opinion, he or she may not be cross-
examined in regard to the content or tenor of any scientific, technical, or professional
text, treatise, journal or similar publication unless any of the following occurs: [¶] (1)
The witness referred to, considered, or relied upon such publication in arriving at or
forming his or her opinion. [¶] (2) The publication has been admitted in evidence.
[¶] (3) The publication has been established as a reliable authority by the testimony or
admission of the witness or by other expert testimony or by judicial notice. . . .”
By its plain language, section 721(b) precludes cross-examination of an expert
about a report unless one of the exceptions set forth in that statute apply. In the present
case, our review of the record confirms that no exception authorized the defense to cross-
examine Holt about the Arizona Report.
The section 721(b)(1) exception did not apply because, as the trial court found,
Holt’s testimony during the section 402 hearing established that she did not refer to,
consider or rely on the Arizona Report in arriving at her opinion. As reflected above,
Holt testified that she had heard of the report but that she did not read it.
Davis contends that section 721(b)(1) was satisfied notwithstanding the fact that
Holt did not rely on the Arizona Report. He cites Jefferson’s California Evidence
Benchbook (Cont.Ed.Bar 3d ed. 1982) section 29.72, pages 644-645, for the proposition
that an expert may be cross-examined about a report of a nonwitness expert if “the expert
witness testifies that he or she considered or referred to, but did not rely, on” the report.
But the record establishes that Holt did not consider or refer to the Arizona Report.
Indeed, she did not even look at it.
Davis argues that Holt “can be deemed to have ‘considered’ the Arizona Report”
because she testified that she was familiar with some aspects of it. This argument is
unsupported by reason or relevant authority. Davis also argues that, even if “the witness
must actually have read the publication, rather than merely have heard about it, in order

23
to be cross-examined on it, then the trial court erred when it ordered Dr. Holt not to read
the Arizona report.” That is not what happened. Rather, the court precluded the defense
from ordering Holt to read a report that had not been properly authenticated and that she
had not previously considered in reaching her expert opinion in this case.
Turning to section 721(b)(2), which authorizes cross-examination of an expert
regarding a report that has been admitted into evidence, this exception did not apply
because the Arizona Report was not admitted into evidence at trial. On appeal, Davis
contends the Report should have been admitted because it was relevant. However, as
best we can determine, Davis’s trial counsel never actually offered the Arizona Report
into evidence.
In any event, Davis fails to convince us that he made a sufficient showing that the
Arizona Report was relevant in this case. Preliminarily, we reiterate that this showing
cannot now be made with evidence that was presented only to Judge Morgan at the pre-
trial proceeding. Beyond that, Davis contends that Mueller’s declaration establishes that
the Arizona Report was relevant and argues that the only reason he did not call Mueller to
San Francisco to testify was that the court refused to change its prior ruling that the
Report was not relevant. First, the trial court ruled that the Mueller declaration was
inadmissible hearsay, a ruling Davis does not dispute on appeal. Second, the court did
not preclude Davis from calling Mueller or any other expert to testify about the Arizona
Report; indeed it urged the defense to do just that.
Finally, section 721(b)(3), which authorizes cross-examination of an expert about
a report if it has been established as reliable by the testimony or admission of any expert
or by judicial notice, did not apply in this case. As the trial court noted, the document
appeared unreliable on its face because it was not published and was accompanied by the
disclaimer that it had been prepared for litigation and produced pursuant to a court order
for a very limited purpose. Furthermore, Barlow’s testimony was insufficient to establish
reliability because she was attempting to act as both defense counsel and an expert in the
same case. Furthermore, Barlow did not even purport to be an expert at calculating
random match statistics. Nor could the defense properly use Barlow to introduce hearsay

24
opinions of actual experts on that subject. Finally, as noted above, the court properly
excluded the Mueller declaration because he was not present and available for cross-
examination.8 Therefore, there simply was no expert testimony before this trial court
establishing the reliability of the Arizona Report.
To summarize, the appellate record establishes that Dr. Holt did not consider, refer
to or rely on the Arizona Report, that report was not admitted or even offered into
evidence at trial, and the reliability of the report was not otherwise established.
Therefore, Evidence Code section 721 precluded the defense from cross-examining Holt
about the Arizona Report. Furthermore, as a purely factual matter, the defense was not
precluded from presenting its own expert to testify about the content and import of the
Arizona Report.
C. The Prosecutor’s Comment
During her closing argument to the jury, the prosecutor made the following
comment: “The defendant did suggest during the trial that there was some issue with the
statistics. There is no evidence however that there was any issue with the statistics.
None. [¶] Every crime lab in the United States of America, every single one, uses the
same method to calculate these statistics.”
Davis argues, as he did in the trial court, that this comment was misconduct
because “the sole reason” that contrary statistical evidence was not introduced at trial
“was because the prosecutor succeeded in excluding it.” According to Davis, the
prosecutor’s comment was an improper half-truth because she blamed the defendant for
failing to produce evidence when she was the one who prevented him from doing so. To
support his conclusion that the comment was misconduct, Davis directs our attention to
People v. Frohner (1976) 65 Cal.App.3d 94, 103 (Frohner).

8
The parties spend significant time debating the merits of Mueller’s expertise and
opinions regarding perceived flaws in the random match probability methodology that
was used in this case. We decline to address these issues in light of the fact that Mueller
did not appear as an expert in this case.

25
 The Frohner court reversed appellant’s drug conviction because it found his case
was severely prejudiced by (1) the prosecutor’s failure to make a reasonable effort to
locate the state’s informant and (2) the trial court’s refusal to reopen the case after jury
deliberations commenced once the informant was located. (Frohner, supra, 65
Cal.App.3d at p. 110.) The court also noted that other trial errors had occurred including
that the prosecutor committed misconduct during closing argument by telling the jury
that, if the defense had wanted the jury to see the People’s informant, he could have used
a subpoena to bring him in. (Id. at p. 108.) This comment was inexcusable, the court
found, because the prosecutor knew that a subpoena could not be served on the informant
and “[t]he only apparent reason for the comment” was to improperly “suggest to the jury
that defendant had purposely failed to call [the informant] as a witness.” (Id. at p. 109.)
Davis contends that the prosecutor in this case made the same type of comment
that the Frohner court characterized as misconduct. We disagree. The Frohner
prosecutor’s comment was improper because he erroneously blamed the defendant for
failing to produce a witness who was unavailable because the prosecutor had failed his
duty to make a reasonable effort to locate that witness. In this case, by contrast, the
prosecutor did not violate any duty by objecting to defense efforts to admit the Arizona
Report via its cross-examination of the prosecution’s expert witness. Thus, there was
nothing erroneous or misleading about the prosecutor’s observation to the jury that the
defense challenged the prosecutor’s statistics but failed to produce contrary statistical
evidence.
Davis insists that the prosecutor’s comment was erroneous because she “urged a
conclusion–that there was no contrary statistical evidence–which was wrong, and which
the prosecutor knew was wrong.” This contention hinges on the premise that the Arizona
Report constituted competent contrary statistical evidence, a premise that the prosecutor
rejected and that the defense failed to substantiate in the trial court. Our review of the
record before us confirms that there was no contrary statistical evidence presented at trial
and the prosecutor’s remark to that effect was fair comment.

26
 Davis intimates that a prosecutor commits misconduct by commenting on the
absence of evidence to which he or she successfully objected even if that objection was
sound. Case law holds otherwise. (People v. Lawley (2002) 27 Cal.4th 102, 152-156
(Lawley).) Misconduct means “the use of deception or reprehensible methods to
persuade the jury. [Citation.]” (Id. at p. 156.) Thus, a prosecutor may commit
misconduct by improperly capitalizing on erroneous evidentiary rulings during closing
argument. However, when “the prosecutor’s argument constituted fair comment on the
evidence, following evidentiary rulings we have upheld, there was no misconduct.”
(Ibid.)
D. Miranda/Doyle Error
As reflected in our factual summary above, the jury heard an audiotape recording
of Spillane’s December 2002 interview of Davis which concluded with the following
statement by Davis: “I ain’t got no more to say to you ‘til I can get an attorney you
know. This is fucked up.” On appeal, Davis objects to the admission of this quoted
statement, contending that the fact that he implicitly invoked his right to silence by
requesting an attorney should not have been used against him. (Citing Miranda, supra,
384 U.S. at p. 468 and Doyle v. Ohio (1976) 426 U.S. 610 (Doyle).)
Davis forfeited this claim of error by failing to raise it in the trial court. (People v.
Huggins (2006) 38 Cal.4th 175, 198-199 (Huggins); People v. Ramos (1997) 15 Cal.4th
1133, 1171.) Although Davis’s trial counsel did move to exclude the entire December 22
interview on the ground that his Miranda rights were violated, the defense never objected
that the specific comment quoted above was inadmissible. Nevertheless, we will address
the merits of this argument because Davis contends that, if this issue was not properly
preserved, he was denied the effective assistance of counsel.
In Doyle, supra, 426 U.S. at page 618, the United States Supreme Court held that
“it would be fundamentally unfair and a deprivation of due process to allow the arrested
person’s silence to be used to impeach an explanation subsequently offered at trial.” As
the court explained, “while it is true that the Miranda warnings contain no express

27
assurance that silence will carry no penalty, such assurance is implicit to any person who
receives the warnings.” (Ibid.)9
The Doyle rule rests “on the fundamental unfairness presented by a breach of the
implicit promise that the prosecution will not use at trial a defendant’s silence: ‘The
point of the Doyle holding is that it is fundamentally unfair to promise an arrested person
that his silence will not be used against him and thereafter to breach that promise by
using the silence to impeach his trial testimony.’ [Citations.]” (People v. Quartermain
(1997) 16 Cal.4th 600, 619.) Our Supreme Court has acknowledged that the rationale of
the Doyle rule applies with equal force to comments which penalize the exercise of the
right to counsel. (Huggins, supra, 38 Cal.4th at pp. 198-199.)
In the present case, evidence of Davis’s invocation of his right to counsel was
admitted as part of the December 22 interview. However, it does not appear to us that the
prosecutor ever made any reference to that invocation during the trial itself. Indeed, it
appears the comment was included simply to signify when the interview ended.
Nevertheless, Davis is adamant that introducing any evidence that he invoked his right to
counsel or silence constituted automatic error. Evidence of the invocation all by itself,
Davis reasons, could lead the jury to infer that the defendant has something to hide.
We reject this proposed automatic error rule for several reasons. First, Davis fails
to cite authority which either articulates or applies such a per se rule. Second, Davis
ignores authority holding that it is not always “error to permit evidence that a defendant
exercised his right to counsel.” (Huggins, supra, 38 Cal.4th at p. 198.) Indeed, claims of
Doyle error have repeatedly been rejected when, as here, “ ‘the prosecutor did not invite
the jury to draw any adverse inference from either the fact or the timing of defendant’s

9
The Doyle rule was foreshadowed in Miranda itself, where the Court stated: “In
accord with our decision today, it is impermissible to penalize an individual for
exercising his Fifth Amendment privilege when he is under police custodial interrogation.
The prosecution may not, therefore, use at trial the fact that he stood mute, or claimed his
privilege in the face of accusation.” (Miranda, supra, 384 U.S. at p. 468, fn. 37.)

28
exercise of his constitutional right.” (Id. at p. 199; see also People v. Crandell (1988) 46
Cal.3d 833, 878; People v. Hughes (2002) 27 Cal.4th 287, 332, fn. 4.)
There may be a case in which the circumstances raise a legitimate concern that the
jury may have drawn an improper inference from evidence that the defendant invoked his
Miranda rights even though the prosecutor did not comment on that invocation. But
Davis does not identify any such circumstance in the present case.
Under the circumstances presented here, where the invocation of the right to
counsel was admitted as part of a recorded statement that was otherwise admissible,
where there was no objection raised in the trial court, and where the prosecutor did not
use the invocation to invite the jury to draw an adverse inference or, indeed, make any
reference to the comment at all, we conclude there was no Doyle error.
E. Confrontation Clause Rights
1. Issues Presented
Davis contends that the trial court violated his constitutional right to confront
witnesses against him by admitting evidence of statements made by two non-testifying
witnesses: Dr. Duazo, the pathologist who prepared the Martz autopsy report, and
Bonnie Cheng, the criminalist who performed a significant portion of the DNA testing
and analysis that was used to link Davis to these crimes.
As noted in our Introduction to this opinion, the California Supreme Court transfer
order directs us to consider four Confrontation Clause cases that were decided in 2012:
Williams, supra, 132 S.Ct. 2221; Lopez, supra, 55 Cal.4th 569; Dungo, supra, 55 Cal.4th
608 and Rutterschmidt, supra, 55 Cal.4th 650. To put these cases in perspective, we
begin with a summary of the core principles elucidated in federal cases that were decided
prior to 2012. We then explore how these principles were applied in the four cases
referenced in the transfer order. Finally, with the guidance of these recent decisions, we
will reconsider the confrontation claims that Davis advances in this appeal.
2. Guiding Principles
The Sixth Amendment to the United States Constitution, made applicable to the
states via the Fourteenth Amendment, states: “In all criminal prosecutions, the accused

29
shall enjoy the right . . . to be confronted with the witnesses against him . . . .” In
Crawford v. Washington (2004) 541 U.S. 36, 68 (Crawford), the United States Supreme
Court held that a defendant’s Sixth Amendment right of confrontation is violated by the
admission of testimonial statements of a witness who was not subject to cross-
examination at trial, unless the witness was unavailable to testify and the defendant had a
prior opportunity for cross-examination.
Crawford overruled Ohio v. Roberts (1980) 448 U.S. 56, 57, which previously
held that evidence with “particularized guarantees of trustworthiness” was admissible
without confrontation. As the Crawford court explained, “[t]o be sure, the Clause’s
ultimate goal is to ensure reliability of evidence, but it is a procedural rather than a
substantive guarantee. It commands, not that evidence be reliable, but that reliability be
assessed in a particular manner: by testing in the crucible of cross-examination. . . .
[¶] Dispensing with confrontation because testimony is obviously reliable is akin to
dispensing with jury trial because a defendant is obviously guilty. This is not what the
Sixth Amendment prescribes.” (Crawford, supra, 541 U.S. at pp. 61-62.)
The Crawford court declined to “spell out a comprehensive definition of
‘testimonial.’ ” The court anticipated (correctly) that its refusal to do so would cause
interim uncertainty. (Crawford, supra, 541 U.S. at p. 68.) In 2009, the high court
revisited the question of what constitutes a testimonial statement in Melendez-Diaz v.
Massachusetts (2009) 557 U.S. 305 (Melendez-Diaz). The Melendez-Diaz defendant was
convicted of distributing and trafficking cocaine based, in part, on “ ‘certificates of
analysis’ ” that were introduced into evidence at trial. (Id. at p. 308.) These certificates,
which were mandated by and prepared in accordance with state law, reported that the
results of forensic analysis showed that material the police had seized from the defendant
was cocaine. (Ibid.) The Melendez-Diaz court held that the certificates were testimonial
statements because they were declarations made for the purpose of establishing a fact
made under circumstances which would lead the affiant to believe or in fact know that
the statements would later be used at trial. (Id. at pp. 310-311.) Therefore, the analysts

30
who made the statements were witnesses for purposes of the Sixth Amendment. (Id. at p.
311.)
In reaching its decision, the Melendez-Diaz court made several important points
regarding the nature of a testimonial statement requiring confrontation. First, a statement
need not be “ ‘accusatory’ ” for the Confrontation Clause to apply; if the statement is
being used against the defendant, it is adverse testimony even if the individual who
prepared it is not a direct accuser. (Melenzez-Diaz, supra, 557 U.S. at pp. 313-314.)
Second, the confrontation requirement is not limited to statements made by
“ ‘conventional’ ” witnesses. (Id. at p. 315.) Thus, statements are not exempt simply
because they (a) recount “ ‘near contemporaneous’ ” observations as opposed to recalling
events observed in the past, (b) do not pertain to observations of the crime or any human
action related to it, or (c) were not provided in response to interrogation. (Id. at pp. 315-
317.) Third, statements pertaining to allegedly “ ‘neutral’ ” scientific tests are not
excepted from the requirements of the Confrontation Clause. (Id. at p. 317.) Carving out
an exception for scientific testing would, the court explained, resurrect an overruled line
of authority which previously held that evidence with “ ‘particularized guarantees of
trustworthiness’ ” was admissible without confrontation. (Ibid.) Fourth, “business
records” are subject to the Confrontation Clause if they are testimonial statements, i.e.,
statements made for the purpose of establishing or proving some fact at trial. (Id. at pp.
321-324.) In this regard, the court expressly declined to approve a purported common
law rule that coroner’s reports are admissible without confrontation. (Id. at p. 322.)10

10
The Melendez-Diaz court also clarified the relationship between the business
records exception to the hearsay rule and the Confrontation Clause, as follows:
“Business and public records are generally admissible absent confrontation not because
they qualify under an exception to the hearsay rules, but because—having been created
for the administration of an entity’s affairs and not for the purpose of establishing or
proving some fact at trial—they are not testimonial. Whether or not they qualify as
business or official records, the analysts’ statements here—prepared specifically for use
at petitioner’s trial—were testimony against petitioner, and the analysts were subject to
confrontation under the Sixth Amendment.” (Melendez-Diaz, supra, 557 U.S. at p. 324.)

31
 Finally, the Melendez-Diaz court cautioned that the requirements of the
Confrontation Clause cannot be relaxed to accommodate the “ ‘ “necessities of trial and
the adversary process.” ’ ” (Melendez-Diaz, supra, 557 U.S. at p. 325.) As the court
explained, notwithstanding the fact that it may make the prosecution of criminal trials
more burdensome, the Confrontation Clause “is binding, and we may not disregard it at
our convenience.” (Ibid.)
In 2011, the United States Supreme Court affirmed the principles it previously
elucidated in Melendez-Diaz in Bullcoming v. New Mexico (2011) 564 U.S. ___ [131
S.Ct. 2705] (Bullcoming). In that case, the defendant was convicted of driving while
intoxicated (DWI) based in part on “a forensic laboratory report certifying that [his]
blood-alcohol concentration was well above the threshold for aggravated DWI.” (Ibid.)
At trial, the prosecutor did not call the analyst who prepared and signed the lab report as a
witness. Instead, evidence of the report was admitted through the testimony of another
analyst who was familiar with the blood test procedure but who did not participate in or
observe the test of the defendant’s blood.
The Bullcoming court held that the defendant was denied his right to
confrontation. (131 S.Ct. at p. 2705.) The court reasoned that the blood alcohol report
was a testimonial statement (id. at pp. 2716-2717) and that the defendant’s right to
confront the analyst who generated that report was not satisfied by the live testimony of a
surrogate analyst who did not prepare the report or certify that it was accurate. (Id. at pp.
2714-2716.) In reaching this conclusion, the court rejected the contention that the blood-
alcohol report was distinguishable from the Melendez-Diaz certificates because it was an
“unsworn” report and was not certified under oath. (Bullcoming at p. 2717.) Finding that
the lab report resembled the Melendez-Diaz certificates in “all material respects,” the
court refused to adopt or approve “any construction of the Confrontation Clause that
would render inadmissible only sworn ex parte affidavits, while leaving admission of
formal, but unsworn statements ‘perfectly OK.’ [Citation.]” (Ibid.)

32
 3. Recent Developments (Cases Referenced in the Transfer Order)
In June 2012, a divided United States Supreme Court decided Williams, supra,
132 S.Ct. 2221. The Williams defendant was convicted of rape based in part on expert
testimony that the defendant’s DNA profile matched a DNA profile which had previously
been developed for semen recovered from the victim’s body. (Id. at pp. 2227-2228.)
Before the defendant was identified as a suspect, that semen sample had been sent to
Cellmark Diagnostic Laboratory, a private company that generated the DNA profile for
the donor sample. At trial, the analyst who developed the defendant’s DNA profile and
the scientist who confirmed the presence of semen on vaginal swabs taken from the
victim appeared and were subject to confrontation. (Id. at pp. 2229-2230.) However, the
Cellmark analyst who developed the DNA donor profile did not testify at trial and the
analyst’s report was not admitted into evidence. (Id. at pp. 2230-2231.) Instead,
evidence about the content of the Cellmark report was admitted through the testimony of
the People’s DNA expert.
The Williams court held that expert testimony about the content of the Cellmark
report did not violate the defendant’s right to confrontation. (132 S.Ct. 2221.) Four
justices approved a plurality opinion which offered two independent justifications for this
conclusion: (1) the expert’s testimony about the Cellmark report was not admitted for its
truth, but solely to explain assumptions underlying the testifying expert’s opinion (id. at
p. 2228); and (2) the Cellmark report was not “testimonial” because it was not prepared
“for the primary purpose of accusing a targeted individual.” (Id. at p. 2243.) Justice
Thomas wrote a separate opinion pursuant to which he concurred in the judgment.
(Williams, supra, 132 S.Ct at pp. 2255-2264 [conc. & dis. opn. of Thomas, J.].) Justice
Thomas agreed with the conclusion of the plurality opinion that there was no violation of
the Confrontation Clause, but rejected its reasoning. (Id. at p. 2255.) Instead, Justice
Thomas found that the Cellmark report did not require confrontation “solely because

33
Cellmark’s statements lacked the requisite ‘formality and solemnity’ to be considered ‘
“testimonial” for purposes of the Confrontation Clause.” (Ibid.)11
In October 2012, the California Supreme Court decided three cases addressing
“the constitutionality of a prosecution expert’s testimony about certain information in a
report prepared by someone who did not testify at trial.” (Lopez, supra, 55 Cal.4th at p.
573; see also Dungo, supra, 55 Cal.4th 608; Rutterschmidt, supra, 55 Cal.4th 650.) In all
three cases, the pivotal issue for the court was whether information in a report constituted
a “testimonial statement” for purposes of the Confrontation Clause. In Lopez, supra, 55
Cal.4th at pages 581-583, the first of this trio of decisions, the court acknowledged that
the federal high court had not agreed on a definition of “testimonial,” but nevertheless
concluded that federal cases indicate that there are at least “two critical components”
which make a statement testimonial, and it used those components to formulate this test:
An out of court statement is testimonial if (1) it is made with “some degree of formality
or solemnity” and (2) its “primary purpose pertains in some fashion to a criminal
prosecution . . . .” (Id. at pp. 581-582.)12

11
The plurality opinion in Williams, supra, 132 S.Ct. 2221, was authored by
Justice Alito and joined by Chief Justice Roberts and Justices Kennedy and Breyer. (Id.
at p. 2227.) Justice Kagen filed a dissenting opinion which was joined by Justices Scalia,
Ginsburg, and Sotomayor. (Id. at p. 2264.)
12
In adopting this test, the Lopez court acknowledged that its prior decision in
People v. Geier (2007) 41 Cal.4th 555 (Geier) is no longer controlling precedent. (Lopez,
supra, 55 Cal.4th at p. 581.) In Geier, supra, 41 Cal.4th 555, an analyst who compared
DNA recovered from inside a rape victim with the defendant’s DNA prepared a report of
her findings but did not testify at trial. Instead, the substance of the DNA report was
conveyed to the jury through the testimony of the People’s expert. The Geier court held
that the DNA report was not a testimonial statement under Crawford, supra, 541 U.S. 36,
because it was a contemporaneous recordation of observable events rather than
documentation of past events relating to criminal activity. (Geier at pp. 605-606.) As the
Lopez court acknowledged, two years after Geier was decided, “the high court in
Melendez-Diaz said that a laboratory report may be testimonial, and thus inadmissible
even if it ‘ “contains near contemporaneous observations of [a scientific] test.” ’
[Citations.]” (Lopez, supra, 55 Cal.4th at p. 581.)

34
 The Lopez court applied this test to a statement in a laboratory report regarding the
percentage of alcohol in a defendant’s blood. (Lopez, supra, 55 Cal.4th at pp. 583-584.)
At the Lopez defendant’s trial for vehicular manslaughter while intoxicated, the lab report
was admitted into evidence and its content was described to the jury by an expert who did
not conduct the test or prepare the report. (Id. at pp. 573-574.) Following her conviction,
the Lopez defendant claimed that she was denied her constitutional right to confront the
author of the lab report. Preliminarily, the Lopez court determined that most of the
information in the lab report did not implicate the Confrontation Clause at all because it
consisted of machine-generated printouts of data. (Id. at p. 583.) The Lopez court held
that computer data does not, by itself, implicate the Confrontation Clause because a
machine cannot be subject to cross-examination. Secondarily, the court declined to
decide whether the non-testifying analyst’s conclusion regarding the blood alcohol
concentration in the defendant’s blood was a testimonial statement because it found that
the prosecutor’s trial expert gave his independent opinion on that subject based on his
direct review of the computer data. (Id. at p. 584.)
Thus, the Lopez court found that the only “statement” in the lab report that raised a
confrontation concern was a notation by a lab assistant that linked the defendant to
certain machine generated results. (Lopez, supra, 55 Cal.4th at pp. 583-584.) The court
held that this notation, though indisputably admitted for its truth, did not constitute a
testimonial statement because it was “not prepared with the formality required by the
high court for testimonial statements.” (Id. at p. 584.) The Lopez court reasoned that,
although both the non-testifying analyst and his non-testifying assistant had placed their
initials near the notation, neither of them “signed, certified, or swore to the truth” of the
statement. (Ibid.)
In Dungo, supra, 55 Cal.4th 608, the court addressed whether a specific type of
information in an autopsy report is a testimonial statement requiring confrontation. At
the Dungo defendant’s murder trial, a forensic pathologist opined that the victim was
strangled. (Id. at p. 614.) The expert testified that his opinion was based on information
gleaned from an autopsy report prepared by a different pathologist who did not testify at

35
trial. The expert used the autopsy report to describe the condition of the victim’s body to
the jury and then gave his independent opinion regarding the victim’s cause of death. (Id.
at pp. 613-614.)
The Dungo court found that two “significant points” limited the constitutional
inquiry regarding the defendant’s right to confrontation in that case: (1) the autopsy
report was not admitted into evidence; and (2) the testifying expert did not relay to the
jury the opinion of the non-testifying pathologist regarding the victim’s cause of death.
(Dungo, supra, 55 Cal.4th at pp. 618-619.) Thus, the sole issue before the Dungo court
was whether the expert’s testimony about “objective facts” recorded in the autopsy report
entitled the defendant to confront and cross-examine the author of that report. To answer
this question, the court employed the test it announced in Lopez, supra, 55 Cal.4th at
page 581, for determining whether a statement is testimonial.
The Dungo court concluded that statements in an autopsy report describing the
“pathologist’s anatomical and physiological observations about the condition of the
body” are not testimonial under either prong of the Lopez test. (Dungo, supra, 55 Cal.4th
at p. 619.) The court reasoned that “statements, which merely record objective facts, are
less formal than statements setting forth a pathologist’s expert conclusions. They are
comparable to observations of objective fact in a report by a physician who, after
examining a patient, diagnoses a particular injury or ailment and determines the
appropriate treatment.” (Id. at p. 619.) In addition, the court found that the primary
purpose of recording such objective facts did not pertain to a criminal investigation. (Id.
at pp. 619-621.)
Rutterschmidt, supra, 55 Cal.4th 650, the third of the trio of Confrontation Clause
cases that our Supreme Court decided in October 2012, pertained to expert testimony
regarding the test results of a sample of a murder victim’s blood. The Rutterschmidt
defendants were convicted of murdering two men by running them over with a car. The
evidence showed that each victim held life insurance policies naming the defendants as
beneficiaries. (Id. at pp. 652-653.) To support the prosecution theory that one of the
victims was drugged before he was killed, the prosecutor elicited testimony from a lab

36
director regarding the results of testing of the victim’s blood sample. The witness based
his testimony on two reports prepared by non-testifying analysts at his lab. (Id. at pp. 652
& 659.) Defendants maintained they had been denied the constitutional right to confront
and cross-examine the analysts who prepared the two toxicology reports. The
Rutterschmidt court declined to decide whether the trial court erred by allowing the lab
director to testify about the content of the toxicology reports. (Id. at p. 661.) The court
reasoned that any error associated with that testimony was harmless beyond a reasonable
doubt in light of the overwhelming evidence of guilt. (Ibid.)
In our opinion, these recent cases regarding the Confrontation Clause do not
establish new or fundamentally different legal principles. Instead, the cases referenced in
the Supreme Court transfer order guide our analysis by highlighting the crucial inquiry,
i.e., whether evidence of a testimonial statement has been admitted into evidence without
affording an opportunity for confrontation, and by establishing the Lopez test for
determining whether a given statement is testimonial and requires confrontation. With
this guidance, we turn to the two sets of statements that gave rise to Davis’s claim of
confrontation error.
4. Dr. Duazo
The first category of statements were made by Dr. Duazo. As reflected in our
factual summary, Dr. Duazo conducted the Martz autopsy and prepared the autopsy
report. Although Dr. Duazo did not testify at trial, her statements were admitted into
evidence through two distinct avenues. First, the Martz autopsy report was admitted into
evidence as a business record. Second, Dr. Amy Hart testified about the content of the
Martz autopsy report.
a. The Autopsy Report
If the Martz autopsy report was a testimonial statement, Davis was denied his right
to confrontation as there is no contention on appeal that Dr. Duazo was unavailable or
subject to prior cross-examination. (Crawford, supra, 541 U.S. at p. 68.) Under Lopez, a
statement is testimonial if (1) it is made with “some degree of formality or solemnity”

37
and (2) its “primary purpose pertains in some fashion to a criminal prosecution . . . .”
(Lopez, supra, 55 Cal.4th at pp. 581-582.)
Under Dungo, supra, 55 Cal.4th 608, statements in an autopsy report describing
the “pathologist’s anatomical and physiological observations about the condition of the
body” are not testimonial statements because they do not satisfy either prong of the Lopez
test. According to the Dungo court, statements of this nature which merely record
objective facts are not sufficiently solemn or formal because they (1) “are less formal
than statements setting forth a pathologist’s expert conclusions” and (2) “are comparable
to observations of objective fact in a report by a physician who, after examining a patient,
diagnoses a particular injury or ailment and determines the appropriate treatment.” (Id. at
p. 619.) Furthermore, the primary purpose of recording these types of observations is not
criminal investigation.
However, the statements at issue in this case are not limited to Dr. Duazo’s
observations about the condition of the victim’s body. An autopsy report “typically
contains two types of statements: (1) statements describing the pathologist’s anatomical
and physiological observations about the condition of the body, and (2) statements setting
forth the pathologists conclusions as to the cause of the victim’s death.” (Dungo, supra,
55 Cal.4th at p. 619.) Here, Dr. Duazo made both types of statements in the Martz
autopsy report. Importantly, that entire report was admitted into evidence at trial; Dr.
Duazo’s findings and conclusions, including her findings regarding the manner and cause
of death, were admitted into evidence without affording the defendant the opportunity to
cross-examine the doctor about the basis for those conclusions.
Dungo, supra, 55 Cal.4th at page 619, supports the conclusion that statements in
an autopsy report setting forth a pathologist’s expert conclusions are sufficiently formal
to satisfy the Lopez test. As the Dungo court found, such statements are substantively
more formal than recorded physiological observations. (Ibid.) Furthermore, such
findings are clearly not analogous to a medical record generated for the purpose of
facilitating medical treatment of a live person especially when, as here, those expert
findings pertain to the circumstances and cause of a murder victim’s death. In the present

38
case, there can be no doubt that Dr. Duazo understood that she was performing an
autopsy on a murder victim and that a primary function of her expert conclusions was to
generate evidence for use at a criminal trial. Thus, applying the test announced by our
Supreme Court in Lopez, supra, 55 Cal.4th at pages 581-582, we conclude that Davis was
denied his constitutional right to confront Dr. Duazo because the autopsy report contains
statements that Duazo made (1) with “some degree of formality or solemnity” and (2) for
a “primary purpose” which pertained “in some fashion to a criminal prosecution . . . .”
(Lopez, supra, 55 Cal.4th at pp. 581-582.)
In a Supplemental Respondent’s Brief, the People contend that Dungo, supra, 55
Cal.4th 608, “squarely substantiates” arguments the People have previously advanced in
this case that an autopsy report is admissible “as a nontestimonial business record.” We
strongly disagree. As reflected above, the autopsy report at issue in Dungo was not
admitted into evidence at trial and the People’s expert in that case did not repeat the
conclusions of the non-testifying pathologist who prepared the report. (Id. at pp. 618-
619.) Therefore, the Dungo court expressly declined to decide the issue presented here,
i.e., whether an entire autopsy report is testimonial in nature. (Ibid.)13
Furthermore, neither Dungo nor any of the other cases we have been instructed to
consider supports the People’s persistent contention that business records are exempt
from the requirements of the Confrontation Clause. As reflected in our factual summary,
the autopsy report was admitted into evidence at Davis’s trial as a business record.
Evidence Code sections 1271 and 1280 provide that business records are not made
inadmissible by the hearsay rule, but they do not and, indeed, could not except a
testimonial statement from the requirements of the Confrontation Clause. (Melendez-
Diaz, supra, 557 U.S. at pp. 321-324.) The Melendez-Diaz court acknowledged that

13
The court had another opportunity adopt the People’s position in People v.
Pearson (2013) 56 Cal.4th 393, 463, but declined to do so. In that case, which squarely
raised the question whether the admission of two autopsy reports authored by a non-
testifying witnesses violated the Confrontation Clause, the court found that any error in
the admission of the autopsy reports and expert testimony about them was harmless
beyond a reasonable doubt. (Ibid.)

39
many business records will be admissible absent confrontation because they were created
for the administration of an entity’s business affairs and not for the purpose of
establishing or proving a fact at trial. (Melendez-Diaz, supra, 557 U.S. at pp. 321-324.)
Furthermore, under the Lopez test, a statement is not testimonial unless its “primary
purpose pertains in some fashion to a criminal prosecution . . . .” (Lopez, supra, 55
Cal.4th at p. 582.) However, if a business record embodies the essential components of a
testimonial statement, it is subject to the requirements of the Confrontation Clause.
(Melendez-Diaz, supra, 557 U.S. at pp. 321-324.)
The People also continue to intimate that autopsy reports should fall outside the
scope of the Confrontation Clause because they are prepared pursuant to statutory
mandates and in accordance with standardized medical protocol which make them
particularly reliable. First, perceived guarantees of trustworthiness do not justify
violating the Confrontation Clause. (Crawford, supra, 541 U.S. at pp. 61-62; Melendez-
Diaz, supra, 557 U.S. at p. 318.) Second, the United States Supreme Court has expressly
rejected the contention that coroner’s reports are exempt from the requirements of the
Confrontation Clause. (Melendez-Diaz, supra, 557 U.S. at p. 322.) Third, the fact that
autopsy reports are prepared pursuant to statutory mandates and in accordance with
standardized protocol only reinforces that the expert conclusions contained in such
reports are sufficiently solemn and formal to satisfy the first prong of the Lopez test.
For all these reasons, we hold that the trial court erred by admitting the entire
autopsy report into evidence at Davis’s trial.
b. Dr. Hart’s Testimony
Dr. Duazo’s statements were also admitted into evidence through the expert
testimony of Dr. Hart. As reflected in our factual summary, Dr. Hart, the Chief Medical
Examiner at the time of trial, testified about the content of Martz autopsy report.
During the course of her testimony, Dr. Hart described Martz’s physical condition
and injuries based on her review of the autopsy report. For example, Hart testified that
the report disclosed that Martz was stabbed three times. Hart also answered questions
about the nature of those stab wounds by repeating statements in the autopsy report. For

40
example, Hart testified that Dr. Duazo concluded that the direction of one of the stab
wounds was from the decedent’s front to her back.
Dr. Hart also testified about Dr. Duazo’s conclusions regarding the manner and
cause of death. At one point during Hart’s testimony, the prosecutor asked whether Dr.
Duazo had ascertained which of the three stab wound was fatal. Dr. Hart responded that
the “mechanism of death” was exsanguination or bleeding to death, that the report
indicated that all three stab wounds had contributed to that bleeding, and that “I don’t
recall any specific stab wound that is singled out as lethal unless I missed something in
the report.” Near the end of her direct testimony, when Hart was asked to repeat the
cause and manner of death, she testified as follows: “The mechanism of death is
exsanguination or bleeding to death. The actual cause of death was certified as multiple
stab and incised wounds.”
Hart also testified about findings Dr. Duazo made during a rectal and vaginal
exam and about evidence samples collected from Martz’s body during that examination.
During this part of her testimony, Hart testified that the report indicated that several
“smears” were prepared during the autopsy. Dr. Hart did not personally review those
smears but she testified that the report indicated that Dr. Duazo reviewed them. Dr. Hart
then proceeded to testify about Dr. Duazo’s findings. For example, she testified that
“[a]ccording to the report” spermatozoa were found in the victim’s vagina. Based on her
review of the autopsy report as well as photos taken at the autopsy and at the crime scene,
Dr. Hart offered the opinion that the sexual penetration most likely occurred before the
injuries that produced the blood.
As discussed above, the expert pathologist who testified at the Dungo trial offered
his independent conclusions regarding the cause and manner of death and did not repeat
any of the conclusions of the non-testifying pathologist. (Dungo, supra, 55 Cal.4th at pp.
618-619.) Under those circumstances, the Dungo court held that expert testimony about
“objective facts” recorded in an autopsy report does not require confrontation of the
author of the report. (Ibid.)

41
 In the present case, our summary of Dr. Hart’s testimony demonstrates that she did
offer some independent expert opinions, most notably the opinion that the victim was
raped before she was murdered. However, we are simply not convinced that Dr. Hart
offered her own independent opinion regarding the manner and cause of death. By
contrast, Dr. Hart clearly did repeat Dr. Duazo’s expert conclusions on that subject.
Thus, we hold that Dr. Hart’s testimony about Dr. Duazo’s conclusions deprived Davis of
his constitutional right to confront witnesses against him.
5. Bonnie Cheng
Applying the principles outlined above, we also find that the trial court admitted
evidence of at least one testimonial statement made by Bonnie Cheng and that Davis was
denied his constitutional right to confront and cross-examine Cheng about that statement
when the court permitted Dr. Cydne Holt to testify about Cheng’s conclusions.
As reflected in our factual summary, Ms. Cheng developed the 13-locus DNA
profiles that were used to link Davis to these crimes. Dr. Holt testified about how those
profiles were generated. Furthermore, it appears that Holt used data in Cheng’s reports to
explain Cheng’s conclusion that the DNA profile created for Davis matched the DNA
donor profile for the sperm sample recovered from Martz’s body. Recorded data in
Cheng’s various DNA reports was likely not testimonial in nature. Such data is
substantively analogous to the machine generated blood test data at issue in Lopez, supra,
55 Cal.4th at pages 538-584. Under the reasoning of Lopez, this type of data does not
implicate the Confrontation Clause because machines are not subject to cross-
examination. (Ibid.) Furthermore, although Dr. Holt’s trial testimony is not as clear as
we would like it to be, it does appear that she reached an independent conclusion
regarding the DNA match by conducting her own visual comparison of the pertinent
DNA data.
However, Dr. Holt also testified about the rarity of the DNA donor profile for the
sperm sample and the statistical “ ‘probability that a random unrelated person by chance
would possess the same DNA profile detected on the sperm fractions’ ” used to generate
the DNA donor profile. Our review of the trial record compels the conclusion that this

42
testimony was not Dr. Holt’s independent expert opinion, but was instead Bonnie
Cheng’s testimonial statement. Indeed, Dr. Holt expressly acknowledged that Cheng
performed the statistical analysis and, when asked to testify regarding the rarity of the
profile, Holt stated: “I would like to read from the report the way it was reported
officially in the record, if that’s okay, Your Honor.” The court granted that request and
Holt proceeded to quote directly from Bonnie Cheng’s report.
Bonnie Cheng’s conclusions regarding the rarity of a DNA match were testimonial
statements under the Lopez test. (Lopez, supra, 55 Cal.4th pp. 581-582.) First, Holt
herself treated those findings as formal conclusions and characterized them as part of the
official record. Second, there is no question those conclusions were made for the primary
if not sole purpose of use at trial to establish facts necessary to convict Davis. Further,
the record does not reflect that Cheng was unavailable at the time of trial or that she was
subject to prior cross-examination by Davis. Therefore, we hold that Davis’s
confrontation rights were violated when Dr. Holt was permitted to testify about the
content of testimonial statements made by Bonnie Cheng.
6. Prejudice
Violations of the Confrontation Clause require reversal of the judgment unless
they are harmless beyond a reasonable doubt. (See Delaware v. Van Arsdall (1986) 475
U.S. 673, 681; Rutterschmidt, supra, 55 Cal.4th at p. 661.) In the present case, we have
already concluded that the judgment must be reversed because of jury misconduct.
Therefore, we need not address whether evidence admitted in violation of Davis’s
confrontation rights was prejudicial. We do note, however, that the jury misconduct that
occurred in this case pertained to Bonnie Cheng’s conclusions regarding the rarity of the
DNA match, and that this testimonial evidence appears to us to have been crucial to the
People’s case against Davis.

43
 IV. DISPOSITION
The judgment is reversed and this case is remanded for further proceedings
consistent with this decision.

_________________________
Haerle, J.

We concur:

_________________________
Kline, P.J.

_________________________
Richman, J.

44