Whether the Due Process Clause requires automatic exclusion of pretrial identification evidence obtained through an unnecessarily suggestive police procedure, without considering the identification's reliability.
Holding
No. Reliability is the linchpin of admissibility, even when the pretrial procedure was both suggestive and unnecessary.
Reasoning
The Court read Stovall v. Denno and Neil v. Biggers as establishing a totality-of-the-circumstances inquiry rather than a rigid rule of exclusion. Stovall recognized that suggestive confrontations may offend due process, but its governing language focused on all the circumstances. Biggers made reliability the central question: whether, despite suggestion, there is a substantial likelihood of misidentification.
The Court rejected the Second Circuit's per se rule. Automatic exclusion would deter police from using unnecessarily suggestive procedures, but it would also withhold reliable and relevant evidence from juries and could result in guilty defendants going free. The totality approach still gives police an incentive to use fair procedures, because a suggestive procedure can cause a resulting identification to be excluded as unreliable.
Due process protects against the danger that unreliable identification evidence will distort the truth-seeking process; it does not establish an automatic sanction for every avoidable police error in arranging an identification. Suggestiveness remains important, but it must be weighed against evidence showing the witness could identify the perpetrator accurately.
The Court held that courts must assess the Biggers factors: the witness's opportunity to view the criminal, degree of attention, accuracy of any prior description, level of certainty at the confrontation, and the time between the crime and the confrontation. Those indicators must be weighed against the corrupting effect of the suggestive procedure itself.