OPINION
This is the second appearance of defendant Mark Joseph Baker before this court appealing his convictions for rape of a child, a first degree felony, in violation of Utah Code Ann. § 76-5-402.1 (1990), and sodomy on a child, a first degree felony, in violation of Utah Code Ann. § 76-5^103.1 (1990). Defendant claims numerous errors by the trial court, as well as ineffective assistance of counsel. We affirm.
BACKGROUND 1
Between July and October, 1987, defendant was married to C.P. The couple lived in Salt Lake County with C.P.’s three sons and *803 her daughter, H.H. H.H. was five or six years old at the time.
During that period, C.P. worked nights as a bartender and defendant watched her children while she was gone. Although the boys often slept outside in a backyard tent, defendant never allowed H.H. to sleep outside with them.
Numerous times while the boys were outside, defendant went into H.H.’s room, undressed himself, and told H.H. to put on her mother’s nightgown. After then tying H.H.’s hands and feet and placing a bandanna in her mouth, defendant had vaginal or anal intercourse with her. At times, he also forced H.H. to perform oral sex.
Defendant was charged with rape and sodomy of a child, and a two day trial began on May 29, 1991. In his opening argument, defense counsel conceded that H.H. had been sexually abused. The only disputed issue was whether defendant was the perpetrator of that abuse. The State produced evidence that H.H. had identified the perpetrator as her stepfather, “Mark,” who had curly hair and “fuzz” on his face, that H.H. never deviated from that identification, and that, in fact, defendant did have facial hair during the time he lived with C.P. and her family. 2 The State also produced evidence that defendant’s sexual activities with C.P. included binding her in the same manner described by H.H. Finally, the State produced evidence that, in 1990, H.H. tested positive for chlamydia in both the vagina and the rectum. The jury returned guilty verdicts on both counts. The court sentenced defendant to two concurrent terms of five years to life, each with a minimum mandatory term of fifteen years.
Defendant filed an appeal on June 28, 1991. On November 2, 1994, this court reversed defendant’s convictions, finding prejudicial error in the trial court’s refusal to dismiss a juror for cause.
See State v. Baker,
ISSUES
Defendant raises several issues on appeal. First, he argues that the trial court improperly admitted expert testimony premised on the victim’s credibility in violation of
State v. Rimmasch,
ANALYSIS
Expert Testimony
Defendant claims the trial court erred in allowing the State’s primary expert to comment on H.H.’s credibility, in violation of
State v. Rimmasch,
*804 The State’s primary expert on child sexual abuse was Dr. Karen Hansen, a pediatrician at Primary Children’s Medical Center, who examined H.H. on December 20,1990. Hansen both interviewed H.H. and performed a physical examination of her. The examination produced “no findings that would have been corroborative of sexual abuse”; however, H.H. did test positive for chlamydia. After meeting with H.H., Hansen concluded that H.H. had been sexually abused. At trial, Hansen testified: “[T]he basis was the fact about the way [H.H.] told her story with explicit details, what, you know, she had to say. And then the [cjhlamydia cultures were very convincing about the sexual abuse.”
In
Rimmasch,
our supreme court held that, absent foundation demonstrating the “inherent reliability” of the scientific basis for an expert’s conclusion that a particular person was telling the truth on a particular occasion, an expert’s opinion “based largely upon ... the expert[’s] subjective appraisals of the [victim’s] truthfulness during interviews” is not admissible.
Rimmasch,
Under
Rimmasch,
the trial court’s admission of Hansen’s bolstering testimony was obvious error. However, Hansen’s testimony went only to whether H.H. had in fact been sexually abused.
4
Defense counsel had already conceded that fact in opening argument. Thus, Hansen’s testimony was essentially cumulative. Because of this, we do not believe that “absent the error, there is a reasonable likelihood of a more favorable outcome” for defendant.
Dunn,
Closing Argument
Defendant’s second claim is that the trial court improperly allowed the State to invoke juror sympathy for H.H. in its closing argument. Because defendant did not object, we review the State’s comments for plain error.
See State v. Dunn,
“Counsel is afforded considerable latitude in closing argument to the jury and may fully recount the evidence adduced and the reasonable inferences to be drawn therefrom.”
State v. Hopkins,
The standard to be applied in determining whether improper argument merits reversal is twofold: (1) was the argument directed toward matters the jury would not be justified in considering, and (2) was the error substantial and prejudicial such that in its absence there is a reasonable likelihood of a more favorable result for the defendant?
Hopkins,
The State’s closing argument in this case, including rebuttal, spans twenty-nine pages of trial transcript. Defendant takes issue with essentially six paragraphs. 6 A review of the State’s argument as a whole indicates that it consisted primarily of a review of the evidence. That review focused not only on H.H.’s vulnerability at the time of the sexual abuse, but also on evidence corroborating H.H.’s story, as well as evidence explaining why H.H.’s testimony might at times have been inconsistent. All of this is proper closing argument. So too is the State’s focusing on this evidence to support a conclusion that H.H. was telling the truth.
To the extent some of the State’s comments exceeded the bounds of permissible argument, we do not believe they rose to the level of obvious error. Most of the comments challenged by defendant are in fact ambiguous as to whether they urge the jury to feel sympathy for the victim or merely urge the jury to believe the victim based on the evidence. This ambiguity, combined with the fact that there was no settled ease law in this state directly addressing comments evoking victim sympathy, indicates the inappropriateness of applying the plain error doctrine to these comments.
See State v. Ross,
Finally, the evidence against defendant in this case was considerable.
See Andreason,
Right to Silence
Defendant also claims the trial court improperly allowed the State to elicit testimony concerning defendant’s invocation of his right to remain silent. “ ‘[W]e will not disturb the trial court’s rulings regarding the admissibility of evidence unless it clearly appears that the lower court was in error.’ ”
State v. Braun,
The Due Process Clause of the Fourteenth Amendment prohibits use of a defendant’s
post-Miranda
silence for impeachment purposes.
See State v. Harmon,
In this case, nothing in the record indicates that the prosecutor used the reference to undermine defendant’s constitutional right to remain silent. The comment came during Detective Cazier’s testimony concerning his investigation;
7
it was isolated and no further reference was made to it during the course of defendant’s trial.
See id.
at 269 (finding no
Doyle
violation where comment was “merely incidentally and inadvertently elicited” and “prosecutor did not make reference to or inquire further into [the defendant’s] silence ..., nor ... attempt to use [the defendant’s] silence to cast an inference of his guilt”);
State v. Singleton,
Furthermore, defendant testified at trial, “thereby offsetting or even dispelling any negative inference regarding [his] silence.”
State v. Lairby,
Ineffective Assistance
Defendant asserts that his counsel’s repeated errors at trial denied him the effective assistance of counsel guaranteed under the Sixth Amendment to the United States Constitution. “When, as in this case, the claim of ineffective assistance of counsel is raised for the first time on appeal, we resolve the issue as a matter of law.”
State v. Strain,
To bring a successful ineffective assistance of counsel claim, “a defendant must show that trial counsel’s performance was deficient in that it ‘fell below an objective
*807
standard of reasonableness,’ and that the deficient performance prejudiced the outcome of the trial.”
State v. Garrett,
1. Admitting sexual assault occurred
Defendant argues that trial counsel was deficient in conceding during opening argument that H.H. had been sexually abused. We disagree.
Although defense counsel must vigorously represent his or her client, “counsel [is] not required to develop every conceivable defense that [is] available.”
State v. Miller,
In this case, the State had substantial evidence that H.H. had in fact been sexually abused. In light of that evidence, it was not unreasonable for defense counsel to concede that issue. Indeed, in doing so, defense counsel could then align himself with any outrage felt by the jury toward the perpetrator and still credibly argue that his client was not that person. We thus conclude that defense counsel’s decision to concede H.H.’s sexual abuse was not deficient, but rather, in light of the circumstances of this case, could be considered sound tidal strategy.
2. Failing to move to exclude evidence of similar sex acts
Defendant also argues that trial counsel was deficient in failing to move to exclude C.P.’s testimony concerning how defendant used to bind her before engaging in sexual activity. Here, too, we disagree.
“ ‘The failure of counsel to make motions or objections which would be futile if raised does not constitute ineffective assistance.’ ”
Parsons,
At the time of defendant’s trial, Rule 404(b) of the Utah Rules of Evidence excluded evidence of prior bad acts if the purpose was to establish a propensity to commit the crime charged.
See
Utah R. Evid. 404(b) (1991). However, such evidence was admissible to establish some other material element of the crime, such as identity.
See State v. Featherson,
In this case, the disputed issue at trial was the identity of H.H.’s abuser. Defendant’s prior sexual conduct with his wife was strikingly similar to the conduct to which H.H. testified she was subjected; this evidence was highly probative on the identity issue and, thus, admissible under Rule 404(b). Trial counsel’s failure to pursue his initial objection to this evidence, therefore, was not deficient.
3. Miscellaneous claims of ineffective assistance
Defendant also claims his trial counsel was deficient in failing to adequately participate in jury voir dire, in failing to investigate and present additional medical evidence on chlamydia, in conducting several off the record discussions with the court, and in placing potentially damaging transcripts into the record. 9 However, for none of these claims does defendant demonstrate prejudice.
Defendant argues, for example, that trial counsel should have conducted additional voir dire on two jurors who he claims, because of their occupations, evidenced a possible bias. However, the trial court questioned the jury pool concerning any biases they had toward law enforcement officers, about any personal experiences with sex-related crimes, and about their ability to decide the case on the evidence. Neither of the two jurors now challenged indicated any inability to approach the case impartially.
See State v. Lafferty,
Defendant also claims trial counsel was deficient for failing to investigate and present additional medical evidence on chlamydia. This evidence, defendant argues, would have aided in his defense because defendant tested negative for chlamydia prior to trial. To demonstrate prejudice from counsel’s failure to investigate, a defendant “must demonstrate a reasonable probability that further investigation would have yielded sufficient information to alter the outcome” of his trial. Id. at 523-24. In this case, numerous witnesses testified concerning how a child could contract chlamydia, whether a suspect’s negative test for chlamydia excludes him as one who could have passed the disease, and the extent to which treatment is required to overcome the disease. Defendant has failed to demonstrate how further investigation would have produced evidence other than that already presented at trial. Thus, defendant has failed to demonstrate how additional investigation would have provided him with “sufficient information to alter the outcome” of his trial. Id.
Defendant also claims trial counsel was ineffective because he failed to make an adequate record of the objections and mo
*809
tions which he made off the record. However, although defendant appears to suggest that his right to appeal has thus been prejudiced,
see State v. Rawlings,
Defendant lastly claims trial counsel was deficient in placing documents into the record that contained damaging hearsay from interviews with H.H. and her mother. However, many witnesses, including both H.H. and her mother, testified at trial as to what H.H. had told others concerning the sexual abuse. Defendant fails on appeal to highlight anything in the documents which is other than cumulative of that testimony. Once again, he has failed to establish prejudice.
Based on the foregoing, we conclude defendant has failed to demonstrate that he was denied effective assistance of counsel at trial.
Sufficiency of the Evidence
Next, defendant claims there was insufficient evidence to support his convictions. In a jury trial, “the jury serves as the exclusive judge of both the credibility of witnesses and the weight to be given particular evidence.”
State v. Workman,
In this case, H.H. never varied in her description of the perpetrator — a man with curly hair and fuzz on his face — or in her identification of that man as her stepfather, Mark. H.H. was also consistent in her testimony concerning the circumstances under which the abuse occurred — the house H.H. lived in at the time, the location of H.H.’s mother and brothers during the abuse, and the method in which the perpetrator bound her. On many of these facts, H.H.’s testimony was corroborated by the testimony of her mother, her half-brothers, defendant himself, and Detective Cazier. Indeed, H.H.’s mother testified that defendant used to bind her in the same manner to which H.H. testified.
Despite this evidence, defendant argues that his convictions must be reversed because H.H.’s testimony was sometimes inconsistent and confused, and because H.H. had failed to pick defendant out of a lineup that occurred just prior to trial. Although we agree that H.H.’s testimony on peripheral issues was not always consistent, none of that testimony undermines the sufficiency of the evidence against defendant.
See State v. Gentry,
Similarly, the fact that H.H. could not pick defendant out of a lineup is not determinative. The abuse occurred in 1987, when H.H. was approximately five year’s old. The lineup took place in 1991. Between 1987 and 1991, H.H. had no contact with defendant. Defendant looked different in 1991 than he did in 1987. The fact that H.H., at age nine or ten, could not pick out a man that she had known four years prior and who looked different at the time she knew him is insufficient to upset defendant’s convictions.
*810 We thus conclude there was sufficient evidence presented at trial to support defendant’s convictions.
Sentencing
Finally, defendant argues that the trial court abused its discretion in finding sufficient aggravating circumstances under section 76-3-201 of the Utah Code
10
to support minimum mandatory sentences of fifteen years on each of defendant’s counts. This court “ ‘does not disturb a sentence unless it exceeds that prescribed by law or unless the trial court has abused its discretion.’ ”
State v. Russell,
On appeal, defendant challenges only two of the four aggravating circumstances upon which the trial court based its sentencing determination. Specifically, defendant challenges the trial court’s findings of “substantial bodily harm” and of a “non-familial relationship of trust.” However, because defendant does not challenge the trial court’s findings that the crime perpetrated “was a very cruel type of crime” and that the victim was “unusually vulnerable,” we need not determine whether the trial court erred in considering the two disputed bases.
See State v. Strunk,
CONCLUSION
We conclude that the trial court did not commit plain error in allowing expert testimony as to H.H.’s truthfulness concerning the fact that she had been sexually abused where defendant conceded in oral argument that such abuse had occurred. We also conclude that the trial court did not commit plain error in allowing the State to emphasize H.H.’s honesty during closing argument where the State’s argument focused primarily on the evidence presented at trial and that evidence was substantial in identifying defendant as the perpetrator. We further conclude that the State did not improperly elicit •testimony concerning defendant’s post-arrest silence where the comment was isolated and the State did not use the comment to undermine defendant’s right to silence. 12 In addition, we conclude that defendant was not denied effective assistance at trial and that *811 there was sufficient identification evidence to support defendant’s convictions. Finally, we conclude that the trial court did not abuse its discretion in sentencing defendant to a minimum mandatory term of fifteen years for each conviction. We thus affirm both defendant’s convictions and his sentences.
WILKINS, Associate P.J., concurs.
BENCH, J., concurs in result.
Notes
. We recite the evidence and all reasonable inferences drawn therefrom in a manner most favorable to the jury verdict.
See State v. Dunn,
. Although H.H. could not recall Mark's last name, evidence at trial indicated H.H. suffers from a learning disability that makes it easier for her to recall experiences than to recall factual information told to her by others.
. The remand was pursuant to an order amending the supreme court’s opinion.
. Hansen was never asked to identify H.H.'s abuser, and Hansen offered no opinion on that issue.
. Plain error is determined under the legal standards applicable at the time of trial,
see Dunn,
. In his brief, Defendant cites specifically to the following portions of the State's closing argument:
[H.H.j's only weapon that she had then and she has now is the truth. And if you don’t believe her, you take away the only weapon that she has. And if you acquit Mr. Baker, then you send the message to [H.H.], Don't come in and tell us you were hurt because we are not going to believe you.
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Our constitution proclaims justice for all. And that includes the little ones, even the children. And when a child's cry is hard to hear, we still have to try and listen. Children in our society deserve justice just like the rest of us, and that includes the right to be believed by eight adults.
[H.H.] can’t vote. We can’t elect legislatures that are supposed to protect her. She can’t even sit on a jury in child sexual abuse cases. But she still has the right to justice, and she still has the right to be believed.
When you retire to the jury room, you have to decide what the truth is in this case. Please do not send a message to [H.H.] and all the other children, Don't come to us when you have been hurt because we won’t believe you, we won’t listen to what you have to say.
I think when you retire to the jury room, you will know what's in your hearts. And you will know the truth about what happened, and that this man, this stepfather of [H.H.], raped her and sodomized her.
Defendant also cites to a portion of the State’s rebuttal:
And as I said earlier, I know that when you retire to the jury room and you look in your hearts for the truth, you will see the weapon that [H.HJ is trying to use so that it doesn’t happen again or to anyone else, and that is the weapon of truth. Please send her the message that you believe her and let her come forward and tell you about what has happened to her. And please find this man guilty of what he did to her.
. During the State’s examination of Detective Larry Cazier, the following dialogue took place:
Q. Did you ever attempt to speak with Mark Baker?
A. Yes, I did.
Q. Did you speak with him?
A. Just briefly.
Q. All right. Did you have any discussion with him about the case?
A. Our only conversation was—
DEFENSE: I’ll object to this, your Honor. I have a feeling that he is going to discuss the exercise of Mr. Baker's constitutional rights.
STATE: I am just trying to establish if he ever talked with him or what he did as part of his investigation.
COURT: I would overrule the objection at this point.
Q. Did you have a conversation with Mr. Baker?
A. I asked him if he would speak to me and he declined to speak to me.
Q. Now, Detective Cazier, did you screen this case with the County Attorney's Office?
. Defendant's reliance on
State v. Doporto,
. Defendant's ineffectiveness claims based on counsel’s delay in invoking the exclusionary rule, his failure to object to cumulative hearsay, his failure to move for dismissal, and his failure to provide mitigating evidence at sentencing are without merit; thus, we do not address them further.
See State v. Carter,
.Section 76-3-201 sets forth the procedures which govern imposition of a minimum mandatory sentence.
See
Utah Code Ann. § 76-3-201 (Supp.1991);
State v. Gibbons,
(5) (a) If a statute under which the defendant was convicted mandates that one of three stated minimum terms shall be imposed, the court shall order imposition of the term of middle severity unless there are circumstances in aggravation or mitigation of the crime.
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(e) The court in determining a just sentence shall consider sentencing guidelines regarding aggravation and mitigation promulgated by the Commission on Criminal and Juvenile Justice.
Utah Code Ann. § 76-3-201 (Supp.1991).
. Defendant also claims his sentences are disproportionately harsh. We do not address this claim because we find it to be without merit.
See State v. Carter,
. Because no substantial errors were committed in this case, we do not reach defendant's claim under the cumulative error doctrine.
See State v. Rammel,
