This is an appeal by the State from an order of the trial court suppressing certain evidence in a prosecution for second-degree murder and manslaughter. We affirm in part and reverse in part.
During the early morning hours of July 23, 1981, twenty-three-month old Joseph Lange (Joseph) was taken to the emergency room of an Aberdeen, South Dakota, hospital by David Holland (defendant). After several resuscitation attempts by hospital staff, Joseph was declared dead. Death was attributed to anoxia, although bruises to Joseph’s face, back, and chest were also present. At the time of this incident, defendant was living with Joseph and Joseph’s mother in an Aberdeen apartment.
While at the hospital, defendant was questioned by Aberdeen Police Captain L.C. Thompson (Thompson). Defendant told Thompson this version of what had happened: Defendant was awakened in the night by the sounds of choking, so he took Joseph into the bathroom to help him; in doing so, he bumped Joseph’s head on the bathroom door. Defendant forced open Joseph’s mouth and removed a piece of foam rubber that was choking the child, but defendant could not resuscitate him.
Defendant twice went back to the apartment with Thompson in an attempt to find the item upon which Joseph had been choking. On the second trip, Thompson gave defendant his Miranda warning and informed him that the case was being treated as a homicide. After the warning, while they were at the apartment, defendant demonstrated to Thompson what had occurred that evening. Defendant then told Thompson that he would say nothing more unless an attorney was present. The Aberdeen police detective, Glenn Imberi, who later assumed responsibility for the case, was told of defendant’s request to remain silent unless an attorney was present and he arranged to conduct all interviews with defendant through defendant’s attorney.
Before any charges were brought against him in South Dakota, defendant moved to Oregon. While there, defendant was charged with child abuse and was incarcerated in the Clatsop County Jail. During his time in the Oregon jail, defend*305ant was interviewed twice about the death of Joseph — once by Rick Lyle, a Clatsop County investigator, and once by Detective Imberi and South Dakota Assistant Attorney General Jon Erickson. Before both of these interviews, defendant was read the Miranda warning, but he did not speak with his South Dakota attorney.
Following these interviews, defendant was indicted by a Brown County, South Dakota, grand jury on two counts of second-degree murder, one count of first-degree manslaughter, and one count of second-degree manslaughter for the death of Joseph. A hearing was held before the trial court to determine the admissibility of certain evidence to be offered by the State. The trial court entered an order suppressing much of the evidence and State appeals that order.
State raises five issues on appeal: 1) Did the trial court err in suppressing statements made by defendant to investigators? 2) Did the trial court err in suppressing photographs of Joseph’s body? 3) Did the trial court err by refusing to allow testimony concerning “battered child syndrome”? 4) Did the trial court err by suppressing evidence of prior acts by defendant? 5) Did the trial court err by failing to reopen the suppression hearing after making its ruling?
I
State’s first contention is that defendant’s statements to investigators should not have been suppressed by the trial court. State claims that before making the statements, defendant voluntarily waived his constitutional privilege against self-incrimination. U.S. Const, amend. V, XIV; S.D. Const, art. VI, § 9. Statements made by defendant in three separate interviews are at issue here: 1) the interview with Rick Lyle, an investigator with the Clatsop County District Attorney, in the Clatsop County Jail on November 17, 1982; 2) the interview with Aberdeen Police Detective Glenn Imberi and Assistant Attorney General Jon Erickson at the Clatsop County Jail on November 21, 1982; and 3) the conversation with Thompson on the night of Joseph’s death. State concedes that the two interviews in the Clatsop County Jail were custodial interrogations.
The United States Supreme Court, in Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694 (1966), set forth the rule that the prosecution may not use statements stemming from a custodial interrogation of a defendant unless it demonstrates the use of procedural safeguards effective to secure the privilege against self-incrimination. One of these safeguards is the right to have an attorney present. A defendant can waive his privilege against self-incrimination and the rights that go along with it, provided that the waiver is made voluntarily, knowingly, and intelligently. Miranda, supra. To determine whether the waiver was made voluntarily, knowingly, and intelligently, we must look to the particular facts and circumstances surrounding the case, including the background, experience, and conduct of the accused. Edwards v. Arizona, 451 U.S. 477, 101 S.Ct. 1880, 68 L.Ed.2d 378 (1981); State v. Hartley, 326 N.W.2d 226 (S.D.1982); State v. Cody, 293 N.W.2d 440 (S.D.1980). We must also consider whether the defendant knew of the nature of the offense for which he was charged or suspected. Cody, supra. State has a heavy burden of demonstrating beyond a reasonable doubt that defendant voluntarily and knowingly waived his rights, and the courts must indulge in every reasonable presumption against waiver. Brewer v. Williams, 430 U.S. 387, 97 S.Ct. 1232, 51 L.Ed.2d 424 (1977); Cody, supra.
We deal first with defendant’s interview with Rick Lyle in the Clatsop County Jail, where defendant was being held on Oregon child abuse charges. Lyle began the interview by reading the Miranda warning to defendant, followed by a short discussion of the Oregon charges. At the time of the warning, defendant stated he did not want an attorney present because he thought the Oregon charges were ridiculous and no attorney was needed. However, not long into the interview, Lyle ab*306ruptly and without warning changed the focus of the questioning from the Oregon child abuse charges to the , South Dakota incident involving the death of Joseph. Lyle never restated the Miranda warning or asked defendant if he had an attorney in the South Dakota matter.
Under the circumstances of the abrupt change in focus of the interview, we find no voluntary or intelligent waiver by defendant of his rights. The record is clear that defendant waived his right to an attorney only for purposes of discussing the Oregon charges. When he waived his rights at that time, he never knew that the South Dakota incident would be raised. It is difficult to conceive how one can intelligently waive his right to counsel when he does not know the nature of the offense with which the major part of the interview will be concerned. Cody, supra. This finding is further buttressed by the fact that defendant had at all prior times chosen to speak about the South Dakota incident only in the presence of his attorney. State has failed to meet the heavy burden of showing an intelligent and knowing waiver of rights by defendant in the interview with Lyle concerning the death of Joseph.
We next consider defendant’s interview with Imberi and Erickson, who were in Oregon ostensibly to interview defendant’s wife. While there, they stopped at the Clatsop County Jail to speak with defendant. They advised defendant of his rights under Miranda, and defendant said he wanted to speak with his attorney. Erickson then proceeded to call the Oregon attorney who represented defendant on the Oregon child abuse charges. Defendant was allowed to speak with the attorney, but the attorney did not come to the jail to take part in the conversation. The South Dakota officers proceeded to question defendant.
We find that under the facts and circumstances of this second conversation, defendant did not knowingly or intelligently waive his rights. It is true that the officers afforded defendant an opportunity to speak with the Oregon attorney before they proceeded with the questioning, but this attorney later stated that he knew nothing of the South Dakota charges or that defendant had a South Dakota attorney. Thus it would have been impossible for the Oregon attorney to properly advise defendant concerning the death of Joseph. In addition, Imberi and Erickson knew that defendant had a South Dakota attorney, they knew there was a prior agreement that defendant would not speak unless his South Dakota attorney was present, they knew defendant had maintained silence before a South Dakota grand jury, and they knew that defendant is a man of “less than average intelligence.” Still, they made no attempt to contact his South Dakota attorney, the one person who could adequately advise defendant with respect to the South Dakota proceedings. In light of these facts, State has failed to meet its heavy burden of showing a waiver of rights.
The third conversation at issue, which involved defendant and Thompson, occurred in Aberdeen on the night of Joseph’s death. After receiving the Miranda warning, defendant demonstrated to Thompson what he had done to Joseph during the events of the evening. Unlike its findings as to the other two interviews, the trial court ruled, in its findings of fact and conclusions of law, that the conversation was admissible, since defendant had knowingly, intelligently, and voluntarily waived his rights. Defendant now maintains that the conversation and demonstration should be suppressed.
We refuse to consider defendant’s claim, however, since he never raised the issue on notice of review as required by SDCL 15-26A-22. Failure to comply with the requirements of SDCL 15-26A-22 precludes this court from considering the issue. Application of Northwestern Bell Tel Co., 326 N.W.2d 100 (S.D.1982). In regard to this third conversation, we also note that any discrepancies between the trial court’s memorandum decision (which said evidence of this conversation should be suppressed) and the findings of fact and conclusions of law must be resolved in fa*307vor of the latter. A memorandum decision is merely an expression of the trial court’s opinion of the facts and law which has no binding effect on the judge or anyone else; the trial court can therefore rethink its memorandum decision. This court’s review is limited to the findings of fact and conclusions of law. Jones v. Jones, 334 N.W.2d 492 (S.D.1983); Hitzel v. Clark, 334 N.W.2d 37 (S.D.1983).
II
State’s second contention is that the trial court abused its discretion by denying admission of photographs of Joseph’s body. Specifically, the trial court suppressed photos of the deceased child’s buttocks, right mid-section, and the right side of his face. The trial court stated that the photographs would merely tend to arouse the passion and prejudice of the jury. The trial court did not, however, suppress photographs of the upper torso and face or testimony from physicians describing bruises on the child’s body.
It is well settled that photographs are admissible into evidence where they accurately portray anything which is competent for a witness to describe in words, or where they are helpful as an aid to a verbal description of objects and conditions, provided they are relevant to some material issue. The photographs are not rendered inadmissible merely because they incidentally tend to arouse passion or prejudice. State v. Huth, 334 N.W.2d 485 (S.D.1983); State v. Rash, 294 N.W.2d 416 (S.D.1980); State v. Disbrow, 266 N.W.2d 246 (S.D.1978). Since the trial court ruled that medical testimony on the condition of the body is admissible, and since bruising is relevant to the issue of child abuse, we find that the trial court abused its discretion by suppressing the photographs.
III
State’s third contention is that the trial court erred by refusing to admit testimony of “battered child syndrome.” Both physicians who performed autopsies on Joseph’s body stated that they did not believe Joseph’s death was intentionally caused or was a result of “battered child syndrome”; they did, however, report numerous bruises and abrasions which appeared to have occurred over a period of time. Dr. Thomas Henry noted approximately seventeen bruises on Joseph’s body, not including those caused by medical cutdowns and resuscitation attempts. He concluded that the number of bruises cause “definite concerns that this child was in fact an abused child,” and that failure to find evidence of a traumatic death does not mean Joseph was not an abused child. Because of this evidence, State intended to have Dr. Robert ten Bensel, a child abuse expert, testify concerning “battered child syndrome.” The trial court rejected this testimony solely on the basis that there was no evidence of bone injury or of subdural hematomas with or without skull fractures; it stated that without such evidence, the six elements of “battered child syndrome” were not present.
In State v. Best, 89 S.D. 227, 232 N.W.2d 447 (1975), this court held that testimony concerning “battered child syndrome” was properly admissible in trial courts. “Battered child syndrome” is a conclusion, based on extensive study by medical science, that a child found with certain types of injuries has not suffered those injuries by accidental means. In Best we stated:
There are several elements that are the criteria for the “battered child syndrome.” They are (1) the child is usually under three years of age; (2) there is evidence of bone injury at different times; (3) there are subdural hematomas with or without skull fractures; (4) there is a seriously injured child who does not have a history given that fits the injuries;
(5) there is evidence of soft tissue injury;
(6) there is evidence of neglect.
89 S.D. at 246, 232 N.W.2d at 458 (citation omitted). The question to be decided is whether all six of these “elements” must be present before testimony of “battered child syndrome” is admissible in trial court. We conclude that not all six need to be present.
*308First, we did not state in Best that all six elements are absolutely required before testimony of “battered child syndrome” is admissible. We did note in Best, as the court did in People v. Jackson, 18 Cal.App.3d 504, 95 Cal.Rptr. 919 (1971), that the six enumerated elements happened to be present in those cases.
Second, we find no authority from other jurisdictions requiring all six elements to be present before allowing testimony of “battered child syndrome.” Of particular importance is authority from New York, California, and Minnesota, the three jurisdictions upon which we relied in Best. In People v. Henson, 33 N.Y.2d 63, 349 N.Y.S.2d 657, 665, 304 N.E.2d 358, 364 (1973), the court stated that “battered child syndrome” testimony is admissible when there is a finding that a child "exhibits evidence ... of subdural hematoma, multiple fractures in various stages of healing, soft tissue swellings or skin bruising.” (Emphasis added.) The court in People v. Ewing, 72 Cal.App.3d 714, 140 Cal.Rptr. 299 (1977), ruled that “battered child syndrome” denotes repeated, sometimes serious, injuries inflicted over a span of time, with their nature, severity, and number being such as to preclude an inference of accident.
The Supreme Court of Minnesota has dealt with an entire series of battered child cases and provides guidance on this question. In Schleret v. State, 311 N.W.2d 843 (Minn.1981), the court held that symptoms needed to support a diagnosis of “battered child syndrome” are multiple, non-accidental injuries done to a child which are in various stages of healing.
Examples of such successive injuries include bruises, burns, and fractures. The child need not have suffered more than one of those successive injuries to permit the diagnosis. The absence of burns and fractures, for example, does not mean that a repeatedly bruised child is any less a victim of “battered child syndrome.”
311 N.W.2d at 844 (emphasis added).
We must agree with the Minnesota Court that “battered child syndrome” can be present when any one of a number of injuries is inflicted upon a child. It would be absurd to hold that a child cannot suffer from battering merely because he has no bone fractures. Testimony concerning “battered child syndrome” should be admitted by a trial court when there is evidence of injuries inflicted upon a child over a span of time, when the nature of the injuries is such as to preclude accidental injury, and when the story given does not explain the injury. See People v. Ewing, supra, and State v. Durfee, 322 N.W.2d 778 (Minn.1982).
IY
State’s fourth contention is that the trial court erred by refusing to admit evidence of prior acts of defendant. The acts in question occurred sometime during the years of 1976-1978 in Billings, Montana, and involved the following circumstances: 1) defendant grabbed a two and one-half month old baby by the throat; 2) defendant intentionally choked his child and then hit him on the back, causing a bruise; and 3) defendant hit a one-week-old baby with his fists. State wants to offer evidence of these prior acts, pursuant to SDCL 19-12-5,1 to prove absence of mistake or accident, opportunity, and identity of defendant as perpetrator of the alleged criminal act. The trial court excluded the evidence, stating that the probative value of the evidence is outweighed by the considerations of SDCL 19-12-3.2
*309The question of balancing the probative value of evidence admissible under SDCL 19-12-5 against the risk of unfair prejudice and the other SDCL 19-12-3 considerations is one for the trial judge to resolve in the sound exercise of his discretion. It is the duty of this court to determine whether there has been an abuse of that discretion. State v. Johnson, 316 N.W.2d 652 (S.D.1982); State v. Houghton, 272 N.W.2d 788 (S.D.1978). We agree with State that there has been an abuse of discretion in the present case.
The admissibility of evidence of other acts to establish intent and absence of mistake or accident is well established in child abuse cases. United States v. Harris, 661 F.2d 138 (10th Cir.1981), citing United States v. Colvin, 614 F.2d 44 (5th Cir.1980), cert. denied 446 U.S. 945, 100 S.Ct. 2174, 64 L.Ed.2d 802 (1980) and United States v. Woods, 484 F.2d 127 (4th Cir.1973), cert. denied 415 U.S. 979, 94 S.Ct. 1566, 39 L.Ed.2d 875 (1974); United States v. Grady, 481 F.2d 1106 (D.C.Cir.1973).
In addition, we recently stated that “prejudice” in SDCL 19-2-3 does not mean damage to the opponent’s case that results from the legitimate probative force of the evidence; rather, it refers to the unfair advantage that results from the capacity of the evidence to persuade by illegitimate means. State v. Iron Shell, 336 N.W.2d 372 (S.D.1983); 22 C. Wright & K. Graham, Federal Practice and Procedure § 5215 (1978). Here, the evidence of prior abuse is not some collateral matter offered solely for prejudicial purposes. The evidence is directed at the vital issues of whether the injuries to Joseph could have happened by accident, as defendant maintains, and whether defendant can be identified as one who may have harmed the child. As such, the evidence may have an adverse impact on defendant’s case, as does most evidence offered by State, but it does not persuade by illegitimate means. Therefore, we find that the value of the evidence is not outweighed by the considerations of SDCL 19-12-3.
V
State’s fifth contention is that the trial court should have reopened the suppression hearing after making its rulings. Having carefully examined the record, we find no abuse of discretion by the trial court in this regard.
The order of the trial court is affirmed on the issues of waiver of rights under Miranda and reopening of the hearing; we reverse on the questions of admissibility of photographs, “battered child syndrome,” and prior acts of the defendant.
FOSHEIM, C.J., and WOLLMAN and MORGAN, JJ., concur. HENDERSON, J., specially concurs in part and dissents in part.. SDCL 19-12-5 (Rule 404(b)) states:
Evidence of other crimes, wrongs, or acts is not admissible to prove the character of a person in order to show that he acted in conformity therewith. It may, however, be admissible for other purposes, such as proof of motive, opportunity, intent, preparation, plan, knowledge, identity, or absence of mistake or accident.
. SDCL 19-12-3 (Rule 403) provides:
Although relevant, evidence may be excluded if its probative value is substantially outweighed by the danger of unfair prejudice, confusion of the issues, or misleading the jury, or by consid*309erations of undue delay, waste of time, or needless presentation of cumulative evidence.