Study finds revised lineup procedures boost eyewitness accuracy to 68%

A new study published this week shows that eyewitness memory can be used reliably in court, challenging the long‑standing view that it is too malleable to trust. Researchers at the University of Illinois tested a revised lineup procedure that reduces suggestion and found that witnesses identified the correct suspect 68 % of the time, compared with 42 % under standard protocols.

For decades, courts have struggled with the reliability of eyewitness testimony. Wrongful convictions have often hinged on misidentification, and a 2014 report by the Innocence Project linked 25 % of overturned cases to faulty eyewitness accounts. In response, some states introduced double‑blind lineups and mandatory police training. Yet the evidence for these reforms has been uneven, and many jurors still view eyewitness evidence as decisive. The new research offers a clearer picture of how memory can be preserved and accessed with fewer errors.

The study used a cognitive interview that prompts witnesses to describe the event in detail before any lineup is shown. Participants were asked to recall sensory details, emotions, and the context of the crime, then later identify the suspect. The researchers found that the richer the initial description, the higher the accuracy of the subsequent identification. They also measured physiological responses during recall and found that heightened arousal correlated with more accurate memory retrieval. Legal scholars say that these findings could inform new guidelines for police and courts, potentially reducing the number of false identifications that lead to wrongful convictions.

If the federal court system adopts these techniques, it could change how eyewitness testimony is treated nationwide. The National Institute of Justice is already funding pilot programs that train law enforcement in the cognitive interview method. Judges may begin to require this protocol before allowing a lineup, and prosecutors may use the richer memory data to support or challenge witness statements. The broader implication is a more reliable judicial process that balances the weight of eyewitness evidence with proven methods to safeguard against its notorious fallibility.