SUMMARY OF ARGUMENT
Decades ago, this Court anticipated what the recent flood of DNA exonerations would ultimately confirm: eyewitness identifications infected by suggestion present a unique threat to the truth- finding function of the trial process. Despite the demonstrated unreliability of such identifications, lay jurors often nonetheless credit eyewitnesses who turn out to be wrong, resulting in miscarriages of justice. Responding to this unique threat, the Court imposed due process limitations on the use of such evidence, holding in a series of cases that eyewitness testimony infected by suggestion will not be admissible in criminal trials absent an independent showing of reliability.
The narrow question before the Court is whether these due process protections apply in cases where the suggestive circumstances were not intentionally orchestrated by police. Because suggestive circumstances pose the same threat to the fairness of trial regardless of who orchestrates them, the Court should answer with a resounding "yes." As this Court noted many years ago, it is not the source of the suggestive circumstance that creates the due process concern but rather "[i]t is the likelihood of misidentification which violates a defendant's right to due process." Neil v. Biggers, 409 U.S. 188, 198 (1972) (emphasis added)."[R]eliability," the Court later reiterated in Manson v. Brathwaite, 432 U.S. 98, 113-14 (1977), "is the linchpin in determining the admissibility of dentification testimony." 432 U.S. at 114 (emphasis added).
As we discuss below, the due processtouchstone should remain reliability, as the constitutional concern has always been that identifications that emanate from suggestivecircumstances undermine the accuracy and fairness of the trial process not whether police wrongdoing has occurred before trial. That is enough to resolve the narrow question presented. But because the Court has not addressed the issue recently, and because it will likely need to make some mention of the reliability analysis in remanding this case, amicus writes separately to alert the Court to an analytical problem in the lower courts that, when combined with recent advances in behavioral science research, has frequently distorted the due process reliability analysis in ways this Court never could have intended.
In its decision in Manson, the Court identified a set of reliability factors for courts to consider in deciding whether an eyewitness identification that was the product of suggestive circumstances should be admitted, including the witness's degree of attention, opportunity to view the perpetrator, level of certainty, and the timebetween the crime and the identification. Manson, 432 U.S. at 114. The Court expressly labeled these factors as illustrative and non-exclusive, and there is no indication the Court intended them to beapplied without regard to advances in scientific research.
Nonetheless, in the past decades, many courts have mistakenly treated the reliability factors discussed in Manson as if they were frozen in time. Those courts have forgotten that this Court's focus in Manson was on reliability, and they have ignored a host of significant scientific advances that have demonstrated flaws in some of the factors listed by Manson and identified other factors that could greatly aid the reliability analysis.
This Court did not intend such a result and should thus make clear that courts applying the Manson reliability factors must not lose sight of their fundamental purpose: to prevent the admission of an identification emanating from circumstances so suggestive as to create a substantial likelihood of a miscarriage of justice. On this point, overall reliability is the key, and courts should determine the admissibility of suggestive identifications against that standard.