State of Iowa v. Colby Davis Laub

IN THE SUPREME COURT OF IOWA

No. 22–1530

Submitted October 11, 2023—Filed February 9, 2024

STATE OF IOWA,

Appellant,

vs.

COLBY DAVIS LAUB,

Appellee.

Appeal from the Iowa District Court for Boone County, Stephen A. Owen,

Judge.

Discretionary review of a district court order granting a defendant’s motion

to suppress evidence of a chemical breath test obtained via search warrant.

REVERSED AND REMANDED.
McDonald, J., delivered the opinion of the court in which all justices join.

Brenna Bird, Attorney General, and Timothy M. Hau (argued) and

Thomas E. Bakke, Assistant Attorneys General, for appellant.
Matthew T. Lindholm (argued) of Gourley, Rehkemper, & Lindholm, P.L.C.,

West Des Moines, for appellee.

Nina Forcier, Waterloo, and Mary K. Spellman, West Des Moines, for

amicus curiae Iowa Association for Justice.
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MCDONALD, Justice.
The question presented in this appeal is whether a peace officer

investigating a suspected offense of operating a motor vehicle while intoxicated

can use a search warrant to obtain from the driver a breath specimen for

chemical testing rather than invoking the statutory implied consent procedure

set forth in Iowa Code chapter 321J (2022). The district court answered that

question in the negative, and it granted the defendant’s motion to suppress

evidence of the results of the chemical breath test obtained pursuant to a search

warrant as well as statements the suspect made to the investigating peace officer.

We granted the State’s application for discretionary review, and we reverse the

district court’s suppression ruling.

I.

Driving while intoxicated has posed a significant public health problem

since the beginning of the mass production and adoption of the automobile. In

1911, the general assembly addressed the problem when it passed Iowa’s first

law prohibiting the operation of a motor vehicle while intoxicated. See 1911 Iowa

Acts ch. 72, § 24 (codified at Iowa Code § 1571-m23 (Supp. 1913)). That law

provided that “[w]hoever operates a motor vehicle while in an intoxicated
condition shall be guilty of a misdemeanor.” Iowa Code § 1571-m23 (Supp.

1913). The law further provided that a conviction under the statute “shall be

reported . . . to the secretary of state, who shall upon recommendation of the

trial court suspend the certificate of registration of the motor vehicle operated by

the person violating this section.” Id.

Since the passage of that first law in 1911, the legislature has repeatedly

revised the law criminalizing the operation of a motor vehicle while intoxicated.

The amendments are numerous, and we need not discuss them all, but we
highlight several significant changes. In 1937, the legislature specifically
 3

addressed for the first time the operation of a motor vehicle while under the

influence of narcotic drugs. See 1937 Iowa Acts ch. 134, § 312 (codified at Iowa

Code § 5022.02 (1939)) (making it a criminal offense to operate a motor vehicle

“while in an intoxicated condition or under influence of narcotic drugs”). In 1969,

the legislature amended the statute again to address other types of drugs,

making it a crime to operate a motor vehicle “while under the influence of an

alcoholic beverage, a narcotic, hypnotic or other drug, or any combination of

such substances.” 1969 Iowa Acts ch. 205, § 1 (codified at Iowa Code § 321.281

(1971)). The 1969 amendment also created an evidentiary presumption in

criminal OWI cases. See id. It provided that “evidence that there was, at the time,

more than ten hundredths of one percentum by weight of alcohol in [a motorist’s]

blood shall be admitted as presumptive evidence that the defendant was under

the influence of an alcoholic beverage.” Id. In 1982, the legislature created the

now familiar per se alcohol offense. See 1982 Iowa Acts ch. 1167, § 5 (codified at

Iowa Code § 321.281 (1983)). That amendment made it unlawful to operate a

motor vehicle “[w]hile having thirteen hundredths or more of one percent by

weight of alcohol in the blood.” Id. The legislature lowered the blood alcohol limit

for a per se offense to .10 in 1986 and the current standard of .08 in 2003. See
1986 Iowa Acts ch. 1220, § 2 (codified at Iowa Code § 321J.2 (1987)); 2003 Iowa

Acts ch. 60, § 1 (codified at Iowa Code § 321J.2(1)(b) (2005)).

The implied consent law at issue in this case was adopted in 1963. See

1963 Iowa Acts ch. 114, §§ 37–50 (originally codified at Iowa Code chapter 321B

(1966), now codified as amended at Iowa Code chapter 321J (2022)). The implied

consent law created a legal fiction of consent. The law provided that where there

were “reasonable grounds to believe” a person to be “operating a motor vehicle

while in an intoxicated condition,” the person “shall be deemed to have given
consent to the withdrawal from his body of specimens of his blood, breath, saliva,
 4

or urine, and to a chemical test or tests thereof.” Iowa Code § 321B.3 (1966).

Upon arrest of the suspect, a peace officer could demand a specimen for chemical

testing. Id. The law gave the arrestee a statutory right to withdraw consent and

refuse to provide a sample for chemical testing. Id. To incent compliance and

disincent refusal, the law provided that refusal would result in revocation of the

arrestee’s license to drive, id. § 321B.7, and that evidence of refusal was

admissible in any action, id. § 321B.11. The stated purpose of the implied

consent law was to “aid the enforcement of laws prohibiting operation of a motor

vehicle while in an intoxicated condition.” 1963 Iowa Acts ch. 114, § 37.

Additional enforcement was necessary to “reduce the holocaust on our highways

part of which [was] due to the driver who imbibe[d] too freely of intoxicating

liquor.” State v. Charlson, 154 N.W.2d 829, 832 (Iowa 1967) (quoting Severson v.

Sueppel, 152 N.W.2d 281, 284 (Iowa 1967)).

Until 1986, the statutory implied consent law remained codified in

chapter 321B of the Iowa Code separate and distinct from the criminal

prohibition contained in section 321.281. In 1986, the legislature combined the

implied consent law and the criminal prohibition into a new chapter of the Iowa

Code, chapter 321J. See 1986 Iowa Acts ch. 1220.
II.

On the night of February 12, 2022, Boone County Deputy Sheriff Seth

McCrea observed a vehicle driving over the speed limit and swaying within a

traffic lane. Suspecting the driver was operating under the influence, Deputy

McCrea initiated a traffic stop. Deputy McCrea asked the driver, Colby Laub,

how much he had been drinking, and Laub replied, “[A] couple beers.” Deputy

McCrea asked Laub to step out of the vehicle. When Laub stepped out of the

vehicle, Deputy McCrea observed an open container of beer in the panel of the
driver’s side door. Deputy McCrea asked Laub whether he would participate in
 5

field sobriety testing. Laub refused. Deputy McCrea handcuffed Laub, placed

him in his vehicle, and transported him to the local law enforcement center.

While on the way to the law enforcement center or while at the law

enforcement center, Deputy McCrea obtained a search warrant under a pilot

program that authorized the application for and issuance of search warrants by

electronic means. See Iowa Sup. Ct. Supervisory Order, In the Matter of

Establishment of the Electronic Search Warrant Pilot Project (Sept. 1, 2022); Iowa

Sup. Ct. Supervisory Order, In the Matter of Establishment of the Electronic

Search Warrant Pilot Project (Apr. 27, 2020). Deputy McCrea informed Laub that

he had a search warrant authorizing him to collect Laub’s breath or blood.

Deputy McCrea informed Laub that the least intrusive means of testing was a

breath test and that if Laub refused to provide a breath specimen, then

Deputy McCrea would transport Laub to the hospital for a blood test. Laub

agreed to provide a breath specimen for chemical testing. Chemical testing of

that specimen showed Laub had a blood alcohol content of .168. Deputy McCrea

placed Laub under arrest after receiving the results of the chemical test. At the

suppression hearing, Deputy McCrea testified that he exercised his “choice and

discretion” to obtain a search warrant rather than invoke the statutory implied
consent procedure because it was the “simplest, most straightforward option in

this case.”

Laub, who was age twenty at the time of the offense, was charged with

operating a motor vehicle while intoxicated (OWI), first offense, in violation of

Iowa Code section 321J.2(2)(a) (2022). Laub moved to suppress evidence of the

chemical breath test as well as statements he made to Deputy McCrea during

the course of the investigation. He argued that Deputy McCrea’s use of a search

warrant to obtain and test a breath specimen was illegal. Specifically, Laub
argued that Deputy McCrea was required to invoke the statutory implied consent
 6

procedure and afford Laub the opportunity to refuse to provide a bodily specimen

rather than proceed with a search warrant. Laub also argued that Iowa Code

chapter 808, governing the issuance of search warrants, does not authorize the

issuance of search warrants for the collection of bodily specimens. Finally, Laub

argued that collection and testing of a breath specimen in lieu of invocation of

the statutory implied consent procedure violated Laub’s federal and state

constitutional rights to equal protection of the laws and due process of law.

The district court granted Laub’s motion on all three grounds. The district

court held Deputy McCrea was not authorized to obtain a search warrant to

collect and test Laub’s breath specimen. The district court first reasoned that

Deputy McCrea was required to invoke the statutory implied consent procedure.

Obtaining a warrant, the district court stated, “eviscerate[d] the statutory right

to refuse testing under implied consent and arbitrarily and summarily

dispense[d] with the rights of citizens to withhold their implied consent.” The

district court also held that Deputy McCrea had no statutory authority to obtain

a search warrant to collect and test bodily specimens. The district court reasoned

that chapter 808 “limits search authority to the search of persons and places

and seizure of property.” Chapter 808, the district court stated, “provides no
express language for taking body samples, even breath samples.” Finally, the

district court held that Deputy McCrea’s decision to apply for and execute a

search warrant violated Laub’s right to equal protection of the laws and Laub’s

right to due process of law under the United States and Iowa Constitutions.

III.

“[T]he implied consent statute is not the exclusive means by which law

enforcement may obtain chemical testing.” State v. Frescoln, 911 N.W.2d 450,

454 (Iowa Ct. App. 2017). The statutory implied consent procedure set forth in
chapter 321J does “not limit the State’s authority to obtain a search warrant
 7

under the general search warrant provisions of Iowa Code chapter 808.” State v.

Oakley, 469 N.W.2d 681, 682–83 (Iowa 1991). The district court erred in holding

otherwise.

A.

This is not the first time this court or the court of appeals has addressed

the issue of whether the statutory implied consent law is the exclusive means by

which a law enforcement officer can obtain a bodily specimen and conduct

chemical testing of the same in investigating an OWI case. In State v. Oakley, a

driver was accused of OWI and refused to submit to a blood test. Id. at 682. The

driver “did allow withdrawal of blood with the intention of submitting it for

independent analysis.” Id. The sheriff retained the sample without having it

analyzed. Id. Three months later, “the county attorney obtained a search

warrant, seized the sample from the sheriff and had it tested. The test showed

an alcohol concentration of .213.” Id. The district court suppressed the test result

on the ground that chapter 321J limited the state’s authority to obtain a search

warrant. Id. This court reversed the suppression ruling. “The legislature

obviously did not intend for chapter 321J to preempt chapter 808.” Id. at 683.

“The provision for a search warrant in section 321J.10 does not limit the State’s
authority to obtain a search warrant under the general search warrant

provisions of Iowa Code chapter 808.” Id. at 682–83.

Later, in State v. Rains, this court stated, “a person cannot be required to

submit a blood, urine or breath specimen via a warrant except in strictly

circumscribed situations such as under section 321J.10.” 574 N.W.2d 904, 913

(Iowa 1998), overruled on other grounds by State v. Williams, 895 N.W.2d 856

(Iowa 2017). This statement in Rains was based on dicta contained in a footnote

in State v. Stanford. Id. (citing Stanford, 474 N.W.2d 573, 575 n.1 (Iowa 1991)).
The dicta in Rains and Stanford are not binding on this court as precedent. See
 8

Judy v. Nat’l State Bank, 110 N.W. 605, 607 (Iowa 1907) (stating “pure dicta, not

necessary to the decision,” is “not binding as a precedent”). This is particularly

true given that subsequent decisions have made clear that the dicta in Rains and

Stanford were incorrect statements of law. See Rathje v. Mercy Hosp., 745 N.W.2d

443, 447 (Iowa 2008) (“We adhere to precedent, but also remain committed to

clarifying the law as we work with our precedent.”).

One of those subsequent decisions is State v. Demaray, 704 N.W.2d 60

(Iowa 2005). In that case, this court addressed the issue of “whether blood test

evidence obtained by the State pursuant to a written release of medical records,

independent of the implied consent statute, may be admissible at trial in an

operating while intoxicated (OWI) case.” Id. at 61. The defendant was involved in

a car crash resulting in injury. Id. An investigating deputy went to the hospital

where the defendant was being treated for his injuries. Id. Rather than invoking

the implied consent procedure, the deputy asked the defendant to authorize the

release of his medical records, which included the results of a blood test the

hospital had just performed. Id. The defendant consented to the release of his

records, which showed blood alcohol concentration of .10. Id. at 62. On the

defendant’s motion, the district court suppressed evidence of the blood test. Id.
This court concluded the district court erred and reversed the order

granting the motion to suppress. Id. at 67. The central question was “whether

section 321J.11 is the exclusive means by which law enforcement may obtain a

blood sample from a defendant in an OWI case.” Id. at 63. This court concluded

that it was not. Id. at 64. “[T]he statutory implied consent procedure must be

followed, but only when the implied consent procedures are invoked.” Id. When

the statutory implied consent procedure is not invoked, a peace officer may use

other methods to obtain evidence in an OWI investigation. See id. (“We now
 9

reiterate that the implied consent law is not the exclusive means by which the

State may obtain blood test evidence from a defendant in an OWI proceeding.”).

In State v. Frescoln, 911 N.W.2d 450, the court of appeals addressed the

exact question presented in this case. In that case, a police officer transferred a

motorist to the police department on suspicion the motorist was operating a

motor vehicle while intoxicated. Id. at 452. Rather than invoking the implied

consent procedure, the officer “secured a search warrant to seize a sample of

Frescoln’s blood for chemical testing, which showed Frescoln’s blood alcohol

content was .093.” Id. The defendant was found guilty of OWI second offense. Id.

On appeal, the defendant contended the evidence of the blood test should have

been suppressed. Id. He argued “the Iowa legislature removed the option of

obtaining a chemical sample by warrant when it enacted our implied consent

laws. . . . [A]n officer may only obtain a sample for chemical testing by following

the procedure established by our implied consent statute.” Id. at 452–53.

The court of appeals rejected the defendant’s argument. The court of

appeals reasoned that “nothing in the statute” makes it “the exclusive means by

which law enforcement can obtain chemical testing of persons suspected of

OWI.” Id. at 454. To the contrary, “the explicit language of chapter 321J . . .
indicate[s] the implied consent statute is not the exclusive means by which law

enforcement may obtain chemical testing.” Id. Specifically, section 321J.18

provides that chapter 321J “does not limit the introduction of any competent

evidence bearing on the question of whether a person was under the influence

of an alcoholic beverage or a controlled substance or other drug.” Id. (quoting

Iowa Code § 321J.18). Relying on the statutory text and this court’s decisions in

Oakley and Demaray, the court of appeals concluded “the State’s ability to obtain

chemical testing is not limited to the provisions of chapter 321J so long as the
procedure utilized conforms to constitutional requirements.” Id. at 454–55.
 10

The district court erred in failing to adhere to Frescoln. Frescoln was a

published decision of the court of appeals, and the district court was duty-bound

to apply it. See Kersten Co. v. Dep’t of Soc. Servs., 207 N.W.2d 117, 121–22 (Iowa

1973) (en banc) (explaining that trial courts are duty bound to follow controlling

precedent); Randy J. Kozel, Settled Versus Right: A Theory of Precedent 19 (2017)

[hereinafter Kozel, Settled Versus Right] (explaining that “vertical precedents are

conclusive wherever they apply[:] . . . [t]he lower courts have no authority to

depart from [vertical precedents],” and that lower courts are not “allowed to make

predictions” about whether a higher court will overturn its precedent (emphasis

omitted)).

B.

While the district court was required to apply Frescoln, this court is not.

See Kozel, Settled Versus Right at 20 (stating that higher courts are “not bound

by the decisions of lower court judges” and that “[l]ower courts influence higher

courts by being persuasive”). Laub argues this court should overrule Oakley and

Frescoln, and he argues that Demaray should be limited to its facts. We are

disinclined to overrule these decisions or artificially limit them. “Stare decisis

alone dictates continued adherence to our precedent absent a compelling reason
to change the law.” Book v. Doublestar Dongfeng Tyre Co., 860 N.W.2d 576, 594

(Iowa 2015). There is no compelling reason to overrule or artificially limit these

decisions because, in our view, Oakley, Demaray, and Frescoln were correctly

decided.

Laub makes numerous statutory arguments in support of his contention

that chapter 321J is the exclusive means by which a peace officer can collect a

bodily specimen from a motorist. Laub’s statutory arguments mostly beg the

question—they assume that chapter 321J applies. For example, Iowa Code
section 321J.9(1) provides that “[i]f a person refuses to submit to the chemical
 11

testing, a test shall not be given.” Laub assumes that this provision applies here

and precludes the officer from obtaining a search warrant or at least gives Laub

the right to refuse execution of the search warrant. In State v. Hitchens, we

explained that this statutory provision prohibits an officer from using a warrant

to obtain a bodily specimen after the officer had invoked the statutory implied

consent procedure and after the motorist had refused consent. 294 N.W.2d 686,

687 (Iowa 1980). But the statutory right of refusal applies “only when the implied

consent procedures are invoked.” Demaray, 704 N.W.2d at 64; see also Frescoln,

911 N.W.2d at 453–54 (“[I]f a driver refuses a chemical test after being offered

one under the implied consent law, the officer cannot then go ‘outside the statute’

to obtain a warrant for chemical testing.” (quoting Hitchens, 294 N.W.2d at 687)).

Here, Deputy McCrea did not invoke the statutory implied consent procedures,

and section 321J.9 is thus inapplicable. See Frescoln, 911 N.W.2d at 453–54

(stating the right of refusal under chapter 321J was inapplicable because the

officer “never invoked the implied consent procedures”).

The Minnesota Court of Appeals reached a similar conclusion regarding

its implied consent law. See State v. Wood, 922 N.W.2d 209, 216 (Minn. Ct. App.

2019). It reasoned that the implied consent law and the right to refuse testing
apply only when the statute is invoked. Id. When a peace officer does not invoke

implied consent, nothing precludes an officer from obtaining and executing a

search warrant for bodily specimens:

Furthermore, nothing in the implied-consent law requires an officer
to invoke the implied-consent law in any particular arrest. . . .
Moreover, nothing in the implied-consent law prevents an officer
from obtaining and executing a search warrant that will yield a
sample of bodily fluid that may be tested. Accordingly, the structure
of [the implied consent statute] and the context in which the implied-
consent law operates make clear that the statutory provision on
which Wood relies applies only if the implied-consent law has been
invoked, which occurs only if an officer reads the implied-consent
advisory to a driver who has been arrested for [OWI].
 12

Id.

Laub’s other statutory arguments that an officer is required to invoke

implied consent in all circumstances as the exclusive means of criminal

investigation runs headlong into the text of the statute. The legislature has not

vested the state with “unfettered ability to invoke the implied consent law.”

State v. Palmer, 554 N.W.2d 859, 861 (Iowa 1996). Instead, the legislature has

“placed limitations on the circumstances under which” an investigating officer

can invoke the statutory implied consent procedure. Id. Laub concedes this is

correct, recognizing that “[t]here are prerequisites that must be met before a

sample can be legally requested.”

An investigating peace officer can invoke the implied consent law only

when the officer has “reasonable grounds to believe that the person was

operating a motor vehicle in violation of section 321J.2 or 321J.2A” and when at

least one of seven specific conditions exist:

a. A peace officer has lawfully placed the person under arrest
for violation of section 321J.2.

b. The person has been involved in a motor vehicle accident
or collision resulting in personal injury or death.

c. The person has refused to take a preliminary breath
screening test provided by this chapter.

d. The preliminary breath screening test was administered
and it indicated an alcohol concentration equal to or in excess of the
level prohibited by section 321J.2.

e. The preliminary breath screening test was administered to
a person operating a commercial motor vehicle as defined in section
321.1 and it indicated an alcohol concentration of 0.04 or more.

f. The preliminary breath screening test was administered and
it indicated an alcohol concentration less than the level prohibited
by section 321J.2, and the peace officer has reasonable grounds to
believe that the person was under the influence of a controlled
substance, a drug other than alcohol, or a combination of alcohol
and another drug.
 13

g. The preliminary breath screening test was administered
and it indicated an alcohol concentration of .02 or more but less
than .08 and the person is under the age of twenty-one.

Iowa Code § 321J.6(1). These restrictions “serve three purposes: (1) to protect

the health of the person submitting to the test; (2) to guarantee the accuracy of

the test; and (3) to protect citizens from indiscriminate testing or harassment.”

Palmer, 554 N.W.2d at 861. The restrictions are necessary when chemical testing

is done “without the protection of a search warrant.” Id.

Laub’s interpretation of the statute upends the statutory limitation on a

peace officer’s statutory authority to invoke the implied consent procedure and

instead imposes a duty on a peace officer to invoke implied consent as the

exclusive means of investigation even when the requisite conditions are not met.

This is contrary to the statutory text, which was meant to restrain an officer from

invoking the statutory implied consent procedure rather than to compel the

officer to do so. Just consider the facts of this case. None of the seven conditions

authorizing Deputy McCrea to invoke the implied consent procedure were

triggered in this case. Of note, Deputy McCrea did not arrest Laub for a violation

of section 321J.2 until after obtaining the result of the chemical breath test. Cf.

Iowa Code § 321J.6(1)(a). Even though Deputy McCrea was not statutorily
authorized to invoke the statutory implied consent procedure prior to obtaining

a warrant, Laub contends he was statutorily required to do so. Laub’s position

is untenable.

Posing a further textual problem for Laub is section 321J.18. That

provision provides that chapter 321J “does not limit the introduction of any

competent evidence bearing on the question of whether a person was under the

influence of an alcoholic beverage or a controlled substance or other drug,

including the results of chemical tests of specimens of blood, breath, or urine.”
Id. § 321J.18. This provision demonstrates “the implied consent statute is not
 14

the exclusive means by which law enforcement may obtain chemical testing.”

Frescoln, 911 N.W.2d at 454.

Laub’s interpretation of the statute is also at odds with constitutional

search and seizure jurisprudence. The relevant cases show a strong preference

for a peace officer conducting a criminal investigation to obtain a search warrant

for the collection of evidence. See Illinois v. Gates, 462 U.S. 213, 236 (1983)

(explaining the “Fourth Amendment’s strong preference for searches conducted

pursuant to a warrant”); State v. Ingram, 914 N.W.2d 794, 816 (Iowa 2018) (“Our

recent cases repeatedly embrace what can only be characterized as a strong

warrant preference interpretation of article I, section 8.”). Despite this

preference, our caselaw also has approved of the warrantless collection of

evidence based on, among other things, “exigent circumstances, searches

incident to arrest, automobile searches, and consent.” State v. McGee, 959

N.W.2d 432, 445 (Iowa 2021). “Consent to chemical testing obtained under the

implied consent statute falls under the voluntary consent exception to the

warrant requirement.” Frescoln, 911 N.W.2d at 453. Properly understood,

chapter 321J is a comprehensive statutory scheme to implement the consent

exception to the constitutional preference for search warrants and not a
mechanism to displace the constitutional use of search warrants. See State v.

Smith, 134 S.W.3d 35, 40 (Mo. Ct. App. 2003) (“The Missouri Implied Consent

Law was enacted to codify the procedures under which a law enforcement officer

could obtain bodily fluids for testing by consent without a search warrant. . . .

Because it is directed only to warrantless tests authorized by law enforcement

officers, it does not restrict the state’s ability to apply for a search warrant to

obtain evidence in criminal cases . . .”).
 15

As the Colorado Supreme Court recently explained in a similar case, use

of a search warrant to collect and test bodily specimens is an additional

investigative tool wholly outside the implied consent law:

Therefore, the Expressed Consent Statute’s silence does not reveal
ambiguity. Instead, it simply reflects the limited scope of the statute,
which by its terms applies to drivers who have impliedly consented
(and then in some cases refused to cooperate). While warrants are
typically a requirement for a reasonable search under the Fourth
Amendment, statutory consent functions as a distinct way to collect
blood samples under the consent exception to that requirement,
Conversely, because consent is an exception to the warrant
requirement, when police have a warrant, consent is immaterial. . . .
[W]arrants are irrelevant to the statutory issue of consent; by
definition, a valid warrant functions as an entirely independent
constitutional ground for conducting a search.

People v. Raider, 516 P.3d 911, 917–18 (Colo. 2022) (en banc) (citations omitted).

Finally, Laub’s interpretation of section 321J is wholly at odds with the

purpose of the statute. The stated purpose of the implied consent law was to “aid

the enforcement of laws prohibiting operation of a motor vehicle while in an

intoxicated condition.” 1963 Iowa Acts ch. 114, § 37. The law expanded the tools

available to peace officers to investigate and enforce drunk driving laws. “To

interpret the provisions of the chapter as limitations on the admissibility of

evidence in a prosecution for [OWI], as [the] defendant would have us, would
create a new handicap to the law enforcement the chapter was designed to aid.”

Charlson, 154 N.W.2d at 832. “[P]roscribing the use of a search warrant as a

means of obtaining evidence of a driver’s intoxication ‘would be to place allegedly

drunken drivers in an exalted class of criminal defendants, protected by the law

from every means of obtaining the most important evidence against them.’ ”

Metzner v. State, 462 S.W.3d 650, 657 (Ark. 2015) (quoting Brown v. State, 774

N.E.2d 1001, 1007 (Ind. Ct. App. 2002)). “We conclude that the implied consent
law is designed to facilitate, not impede, the gathering of chemical test evidence
 16

in order to remove drunk drivers from the roads. It is not designed to give greater

fourth amendment rights to an alleged drunk driver than those afforded any

other criminal defendant.” State v. Zielke, 403 N.W.2d 427, 428 (Wis. 1987).

C.

We have considered each of Laub’s statutory arguments, whether or not

explicitly discussed herein, and find them without merit. Every state has a

statutory implied consent law. See Birchfield v. North Dakota, 579 U.S. 438, 444

(2016). Most states interpreting similar laws have considered the same or similar

statutory arguments Laub advances here and have concluded that the statutory

implied consent procedure does not preclude peace officers from obtaining a

search warrant to collect and test bodily specimens. See State v. Evans, 378 P.3d

413, 420 (Alaska Ct. App. 2016); Metzner, 462 S.W.3d at 656–57; State v. Geiss,

70 So. 3d 642, 647 (Fla. Dist. Ct. App. 2011); Brown, 774 N.E.2d at 1003; State v.

Green, 91 So. 3d 315, 316–17 (La. Ct. App. 2012); Smith, 134 S.W.3d at 40;

State v. Minett, 332 P.3d 235, 238 (Mont. 2014); State v. Garnenez, 344 P.3d

1054, 1058 (N.M. Ct. App. 2014); State v. Chavez, 767 S.E.2d 581, 585 (N.C. Ct.

App. 2014); Beeman v. State, 86 S.W.3d 613, 615–16 (Tex. Crim. App. 2002)

(en banc); State v. Stone, 728 S.E.2d 155, 168 (W. Va. 2012); Zielke, 403 N.W.2d
at 428. We find these decisions persuasive on the questions presented in this

case and in accord with this court’s and the court of appeals’ prior decisions on

this issue. We conclude the district court erred in holding that chapter 321J is

the exclusive means of investigating a suspected OWI and precludes a peace

officer from obtaining and executing a search warrant for the collection of bodily

specimens.

IV.

“[T]here is no common-law right to issue a search warrant . . . .” Meier v.
Sulhoff, 360 N.W.2d 722, 726 (Iowa 1985) (en banc) (citations omitted). Search
 17

warrants must be authorized, issued, and executed pursuant to statute. The

district court held that Iowa Code chapter 808, which governs the application,

issuance, and execution of search warrants, does not authorize search warrants

to collect and test bodily specimens. For the reasons expressed below, we

disagree.

We begin with the language of the statute at issue. See Doe v. State, 943

N.W.2d 608, 610 (Iowa 2020) (“Any interpretive inquiry thus begins with the

language of the statute at issue.”). The Code defines a “search warrant” to be “an

order in writing, in the name of the state, signed by a magistrate, and directed

to a peace officer commanding the officer to search a person.” Iowa Code

§ 808.1(2). The search warrant must describe “the person . . . to be searched.”

Id. § 808.3(1). The warrant must command “that peace officer forthwith to search

the named person.” Id. § 808.4. In addition to authorizing search warrants to

search persons, the Code authorizes the seizure of “any other property relevant

and material as evidence in a criminal prosecution.” Id. § 808.2(4). “Property”

“includes personal and real property.” Id. § 4.1(24). “Personal property”

“include[s] money, goods, chattels, evidences of debt, and things in action.” Id.

§ 4.1(21). Section 4.1(21)’s use of the word “includes” in the definition of
“personal property” shows the enumerated list of personal property is illustrative

and not exhaustive. See Am. Eyecare v. Dep’t of Hum. Servs., 770 N.W.2d 832,

837 (Iowa 2009) (“Generally, the ‘verb “includes” imports a general class, some

of whose particular instances are those specified in the definition.’ ” (quoting

Helvering v. Morgan’s, Inc., 293 U.S. 121, 125 n.1 (1934))).

The Code’s authorization to issue search warrants commanding the search

of persons and the collection of personal property and evidence material to

criminal prosecutions implies the authority to seize anything of evidentiary value
from the person searched, including bodily specimens. See, e.g., United States v.
 18

Kriesel, 720 F.3d 1137, 1144–45 (9th Cir. 2013) (holding that “the blood sample

itself . . . and the genetic code contained within the blood sample” is property);

United States v. Comprehensive Drug Testing, Inc., 621 F.3d 1162, 1173 (9th Cir.

2010) (holding urine samples were property), overruled in part on other grounds

by Demaree v. Pederson, 887 F.3d 870 (9th Cir. 2018) (per curiam); Geiss, 70

So. 3d at 649 (“First, Geiss argues that blood is not ‘property’ within the meaning

of the statute. We reject this argument, . . . ‘property’ does not exclude those

substances that are naturally produced by the human body.”); People v.

Marshall, 244 N.W.2d 451, 457 n.23 (Mich. Ct. App. 1976) (stating that blood

and hair samples were property or things that could be seized under warrant);

State v. Emerson, 981 N.E.2d 787, 792 (Ohio 2012) (“[A] blood sample is not

unlike other tangible property . . . .” (quoting Wilson v. State, 752 A.2d 1250,

1269 (Md. Ct. Spec. App. 2000))); Gentry v. State, 640 S.W.2d 899, 902–03 (Tex.

Crim. App. 1982) (en banc) (“We are thus constrained to hold that, though ‘blood’

is not specifically itemized in Article 18.02, it is nonetheless an item of evidence

to search for and to seize which a search warrant may issue . . . .”). “It only

makes sense that the legislature would intend the term ‘property’ to broadly

include the types of physical items that would routinely be seized in connection
with a criminal investigation.” Geiss, 70 So. 3d at 650.

The district court’s contrary interpretation and construction of

chapter 808 runs afoul of the general rule that when more than one statute bears

on an issue, courts must attempt to harmonize the relevant statutes and not

interpret or construe them to render one or more of the statutes inoperative. See

Kolzow v. State, 813 N.W.2d 731, 736 (Iowa 2012) (“If more than one statute

relating to the subject matter at issue is relevant to the inquiry, we consider all

the statutes together in an effort to harmonize them.” (quoting State v. Carpenter,
616 N.W.2d 540, 542 (Iowa 2000) (en banc))); Saydel Educ. Ass’n v. Pub. Emp.
 19

Rels. Bd., 333 N.W.2d 486, 489 (Iowa 1983) (stating that courts should interpret

statutes so that “no part will be inoperative or superfluous, void or insignificant”

(quoting City of Fort Dodge v. Iowa Pub. Emp. Rels. Bd., 275 N.W.2d 393, 397

(Iowa 1979))). Section 321J.10 provides that a refusal to consent “does not

prohibit the withdrawal of a specimen for chemical testing pursuant to a search

warrant” issued in an investigation of cases where “[a] traffic accident has

resulted in a death or personal injury reasonably likely to cause death,” and

“[t]here are reasonable grounds to believe that one or more of the persons whose

driving may have been the proximate cause of the accident was violating

section 321J.2 at the time of the accident.” Iowa Code § 321J.10(1). That section

further provides that “[s]earch warrants may be issued under this section in full

compliance with chapter 808.” Id. § 321J.10(2). Under the district court’s

interpretation of the statute, however, chapter 808 cannot be used to obtain

search warrants for bodily specimens. The district court’s interpretation and

construction of chapter 808 thus renders section 321J.10 wholly inoperative.

The district court’s interpretation and construction of chapter 808 is also

inconsistent with Iowa’s precedents and the established practice of law

enforcement officers in this state. Iowa’s precedents have implicitly approved
(and some have required) the use of search warrants to collect and test bodily

specimens in criminal investigation of OWI cases. See, e.g., State v. Pettijohn, 899

N.W.2d 1, 38–39 (Iowa 2017) (holding that implied consent could not be invoked

because the Iowa Constitution required a search warrant for chemical testing of

breath in investigation of operating a boat while intoxicated), overruled by

State v. Kilby, 961 N.W.2d 374 (Iowa 2021); State v. Johnson, 744 N.W.2d 340,

342 (Iowa 2008) (“[W]ithdrawal of a specimen of blood, breath, or urine for

chemical testing is permitted over the individual’s objection pursuant to a search
warrant when a traffic accident has resulted in death or injury reasonably likely
 20

to cause death . . . .”); Stanford, 474 N.W.2d at 576 (stating a bodily specimen

“is subject to a search warrant”); Hitchens, 294 N.W.2d at 687 (“[B]lood samples

taken pursuant to a valid warrant meet the reasonableness requirement of the

fourth amendment.”); State v. Dewbre, 987 N.W.2d 861, 867 (Iowa Ct. App. 2022)

(affirming use of a search warrant to collect bodily specimens); State v. Wenzel,

987 N.W.2d 473, 482 (Iowa Ct. App. 2022) (affirming use of warrant authorizing

collection of “blood, urine, and/or breath specimen”).

We will not upset settled law and established practice with a novel

interpretation of chapter 808. We conclude the district court erred in holding

that chapter 808 does not authorize the issuance of search warrants for the

collection of bodily specimens.

V.

The district court concluded there was an equal protection violation here,

but its rationale was underdeveloped and unclear. The district court held that

“[c]hoosing personal extra-legal routes for the sake of simplicity under color of

law deprived Mr. Laub of . . . equal protection of the law under the Iowa and

United States Constitutions.” The district court further held that “[e]xclusion of

evidence obtained upon such intentional violations is the legal, appropriate and
just remedy via the exclusionary rule.” We interpret the district court’s order to

encompass a ruling on the constitutionality of the implied consent statute and a

ruling on Deputy McCrea’s investigative decision to obtain and execute a search

warrant.

The United States and Iowa Constitutions guarantee all persons the equal

protection of the laws. The Fourteenth Amendment to the United States

Constitution provides that “[n]o State shall . . . deny to any person within its

jurisdiction the equal protection of the laws.” U.S. Const. amend. XIV, § 1. The
Iowa Constitution provides that “[a]ll laws of a general nature shall have a
 21

uniform operation; the general assembly shall not grant to any citizen, or class

of citizens, privileges or immunities, which, upon the same terms shall not

equally belong to all citizens.” Iowa Const. art. I, § 6. This court’s precedents hold

that article I, section 6 means “similarly situated persons [should] be treated

alike under the law.” In re Det. of Williams, 628 N.W.2d 447, 452 (Iowa 2001) (en

banc). At its core, the federal and state constitutional guarantees are meant to

protect “against intentional and arbitrary discrimination, whether occasioned by

express terms of a statute or by its improper execution through duly constituted

agents.” Village of Willowbrook v. Olech, 528 U.S. 562, 564 (2000) (per curiam)

(quoting Sioux City Bridge Co. v. Dakota County, 260 U.S. 441, 445 (1923)).

When a litigant challenges a statute on equal protection grounds, “the first

step in our equal protection analysis is to determine whether the challenged law

makes a distinction between similarly situated individuals with respect to the

purposes of the law.” State v. Treptow, 960 N.W.2d 98, 104 (Iowa 2021). “This is

a threshold test.” Id. The threshold test was not satisfied in this case.

Chapter 321J makes no distinctions between persons, let alone distinctions

between similarly situated persons. The statutory implied consent procedure

gives peace officers an additional tool to investigate OWI cases by vesting them
with discretion to invoke the statutory implied consent procedure when the

statutory prerequisites are satisfied, but all motorists are subject to the same

law. Because the law makes no distinctions between classes of persons, the

district court erred to the extent it held the implied consent statute violates the

federal or state guarantee of equal protection of the laws.

To the extent the district court held that Deputy McCrea’s exercise of

discretion violated the federal or state guarantee of equal protection of the laws,

the district court erred. “There are some forms of state action . . . which by their
nature involve discretionary decisionmaking based on a vast array of subjective,
 22

individualized assessments.” Engquist v. Or. Dep’t of Agric., 553 U.S. 591, 603

(2008). A peace officer investigating a suspected case of OWI is an example. In

deciding whether to invoke the statutory implied consent procedure, obtain a

search warrant, or proceed without consent or a search warrant, a peace officer

must balance an array of individualized considerations in choosing how to

investigate each case, including the location of the traffic stop, the time of day,

the availability of a magistrate, the condition of the driver, the probability of

obtaining consent, etc.

A statutory scheme that allows a peace officer to exercise investigative

discretion, and a peace officer’s exercise of that discretion, in and of itself, does

not violate the federal or state constitutional guarantees of equal protection

under the law. See Pratt v. Helms, 73 F.4th 592, 595 (8th Cir. 2023)

(“[I]nvestigative decisions are generally left to the discretion of the executive

branch.”); Flowers v. City of Minneapolis, 558 F.3d 794, 799–800 (8th Cir. 2009)

(“[W]e conclude that while a police officer’s investigative decisions remain subject

to traditional class-based equal protection analysis, they may not be attacked in

a class-of-one equal protection claim.”); State ex rel. Miller v. DeCoster, 596

N.W.2d 898, 904 (Iowa 1999) (“An equal protection analysis affords governmental
bodies broad discretion in pursuing legitimate governmental interests.”).

Allowing an equal protection challenge to a peace officer’s exercise of legitimate

investigative choices, “even if for no discernible or articulable reason, would be

incompatible with the discretion inherent in the challenged action. It is no proper

challenge to what in its nature is a subjective, individualized decision that it was

subjective and individualized.” Engquist, 553 U.S. at 604. “In such cases the rule

that people should be ‘treated alike, under like circumstances and conditions’ is

not violated when one person is treated differently from others, because treating
 23

like individuals differently is an accepted consequence of the discretion granted.”

Id. at 603.

VI.

The district court also held that Laub’s federal and state rights to due

process were violated when Deputy McCrea obtained and executed a search

warrant to collect and test Laub’s breath specimen. The district court held that

“[c]hoosing personal extra-legal routes for the sake of simplicity under color of

law deprived Mr. Laub of substantive and procedural due process . . . under the

Iowa and United States Constitutions.” We conclude the district court erred in

holding that collection and testing of a breath specimen pursuant to a search

warrant violated Laub’s due process rights.

A.

The United States and Iowa Constitutions guarantee to all persons due

process of law. The Fourteenth Amendment provides that “nor shall any State

deprive any person of life, liberty, or property, without due process of law.” U.S.

Const. amend. XIV § 1. Article I, section 9 of the Iowa Constitution provides that

“no person shall be deprived of life, liberty, or property, without due process of

law.” Federal and state precedents hold that the entitlement to due process of
law has substantive and procedural aspects. See In re V.H., 996 N.W.2d 530,

539–42 (Iowa 2023) (discussing substantive and procedural due process claims).

B.

Under the relevant precedents, a party can raise a substantive due process

challenge to a statute. When a party raises a substantive due process challenge

to a statute, “[t]he first step [in the legal analysis] is to ‘identify the nature of the

individual right involved’ and determine whether that right is fundamental.”

State v. Groves, 742 N.W.2d 90, 92 (Iowa 2007) (quoting In re Det. of Cubbage,
671 N.W.2d 442, 446 (Iowa 2003)). “United States Supreme Court precedent
 24

demands we craft ‘a careful description of the asserted fundamental liberty

interest.’ ” Id. (quoting Chavez v. Martinez, 538 U.S. 760, 775 (2003)). “Once we

identify the nature of the right, the second step is to apply the appropriate test.

If we determine the right is fundamental, then we will apply strict scrutiny.” Id.

at 93. “If we determine a fundamental right is not implicated, we apply a rational

basis review.” Id.

Before proceeding, it is important to clarify Laub’s argument on appeal.

There is no doubt that Laub has an interest in his “bodily integrity.” Missouri v.

McNeely, 569 U.S. 141, 148 (2013). But that interest is not absolute, and the

use of a search warrant to obtain a bodily specimen to investigate a suspected

OWI offense is a constitutional means for a peace officer to overcome that

interest. See id. But Laub does not argue that the use of a search warrant, in

and of itself, violates his right to due process. Instead, he makes a more subtle

argument. He argues that due process requires an officer to invoke the statutory

implied consent procedure and precludes an officer from obtaining a search

warrant. Specifically, he argues that a due process concern arises “when

government officials preclude a citizen from exercising a statutory right.” The

district court’s suppression ruling rested on this same premise—that Laub had
a statutory right “to have the substantive provisions of 321J applied to him.”

Laub’s argument—and the district court’s holding—is predicated on a

misunderstanding of the statute. It is true that a motorist has a statutory right

to refuse testing once a peace officer invokes the statutory implied consent

procedure and requests permission to test. Hitchens, 294 N.W.2d at 687–88

However, the statutory right of refusal applies “only when the implied consent

procedures are invoked.” Demaray, 704 N.W.2d at 64. Here, Deputy McCrea did

not invoke the implied consent procedure, so no statutory right is even
implicated.
 25

Furthermore, it would be odd to characterize the statutory implied consent

procedure as creating a right in favor of a motorist suspected of OWI. The

statutory implied consent procedure was designed to provide law enforcement

with additional tools to investigate and enforce OWI laws and reduce traffic

fatalities. The law incents compliance with requests for chemical testing and

disincents refusal through the means of license revocation and allowing evidence

of refusal to be admitted at any trial. See Hitchens, 294 N.W.2d at 688 (“On the

one hand the state recognizes a driver’s ‘right’ to refuse testing, but on the other

hand it extracts a penalty for exercising the right revocation of the driver’s

license. By striking this balance, the statute motivates drivers to take the test,

but does so without resorting to physical compulsion. Loss of driving privileges

appears to be the sanction the General Assembly selected for refusing a test.”).

We are unaware of any constitutional right, fundamental or otherwise, affording

a motorist an opportunity to refuse consent to provide a bodily specimen for

chemical testing on penalty of having one’s license revoked or having one’s

refusal be admitted in a criminal trial. We decline to recognize such a

constitutional right.

To the extent the district court held that Deputy McCrea’s conduct—his
exercise of discretion to obtain and execute a search warrant—violated Laub’s

right to substantive due process, the district court erred. A party can raise a

substantive due process challenge to test the legality of government conduct.

“When specific government conduct (as opposed to legislation) is alleged to have

violated substantive due process, we typically apply the ‘shocks the conscience’

standard to assess the claim.” Lennette v. State, 975 N.W.2d 380, 393–94 (Iowa

2022). “A substantive due process violation is not easy to prove . . . .” Blumenthal

Inv. Trs. v. City of West Des Moines, 636 N.W.2d 255, 265 (Iowa 2001). The claim
“is reserved for the most egregious governmental abuses against liberty or
 26

property rights, abuses that ‘shock the conscience or otherwise offend . . .

judicial notions of fairness . . . [and that are] offensive to human dignity.’ ” Id.

(alteration and omissions in original) (quoting Rivkin v. Dover Twp. Rent Leveling

Bd., 671 A.2d 567, 575 (N.J. 1996)).

A peace officer obtaining a search warrant in compliance with federal and

state constitutional requirements to investigate suspected criminal activity in no

way shocks the conscience or offends human dignity. To the contrary, the

Supreme Court has explained that use of a search warrant to investigate OWI

offenses is the constitutionally preferred method of investigation. See McNeely,

569 U.S. at 148 (“The importance of requiring authorization by a ‘neutral and

detached magistrate’ before allowing a law enforcement officer to ‘invade

another’s body in search of evidence of guilt is indisputable and great.’ ” (quoting

Schmerber v. California, 384 U.S. 757, 770 (1966))).

C.

The district court also erred in holding that Deputy McCrea’s use of a

warrant to obtain and test a breath specimen violated Laub’s right to procedural

due process. Even if the statutory implied consent procedure was the exclusive

means of criminal investigation allowed in OWI cases, which it is not, “[t]he
government’s failure to comply with a statute or ordinance does not necessarily

establish a due process violation.” Stogdill v. City of Windsor Heights, 991 N.W.2d

719, 731 (Iowa, 2023); see also Womack v. Carroll County, 840 F. App’x 404, 407

(11th Cir. 2020) (per curiam) (“[T]he mere violation of a state statute outlining a

required procedure does not necessarily equate to a due process violation.”);

Behm v. City of Cedar Rapids, 922 N.W.2d 524, 568 (Iowa 2019) (“A mere

violation of a statute does not give rise to a due process violation . . . .”). Instead,

the party raising the challenge must show that the state failed to provide the
minimum process the Federal and State Constitutions require.
 27

Deputy McCrea’s decision to forego the statutory implied consent

procedure and obtain a search warrant did not violate Laub’s right to procedural

due process. This court has explained statutory implied consent procedures are

“not mandated by the due process . . . provisions of the United States

Constitution.” Kilby, 961 N.W.2d at 378 (quoting State v. Knous, 313 N.W.2d

510, 512 (Iowa 1981)). More recently, in State v. Baraki, this court explained that

while “[t]he implied consent law . . . gives the potentially intoxicated driver a

choice[,] . . . [t]he choice is not constitutionally required for a breath test.” 981

N.W.2d 693, 697 (Iowa 2022).

In State v. Dewbre, the court of appeals concluded it was “clear that

implied-consent procedures are not the exclusive means for testing.” 987 N.W.2d

at 865. The Dewbre court rejected the defendant’s argument that the officer’s

decision to obtain a warrant rather than invoke the implied consent procedure

violated the defendant’s right to due process: “By obtaining a warrant, the officer

provided more safeguards to Dewbre than if the officer had invoked implied

consent. Implied consent is invoked based on the judgment made by the officer.

In contrast, a warrant is issued based on probable cause findings of a neutral

and detached third party—the judicial officer issuing the warrant.” Id. at 865–66
(citation omitted). The court found “unpersuasive” the defendant’s argument that

her due process rights were violated by providing her with more process and

more judicial oversight than Iowa Code chapter 321J requires. Id. at 865–66. We

agree.

VII.

For the foregoing reasons, we reverse in all respects the district court’s

order granting Laub’s motion to suppress evidence, and we remand this matter

to the district court for further proceedings.
REVERSED AND REMANDED.