Lineup Methods

Executive Summary

The significant role that mistaken eyewitness identifications have played in convictions of the innocent has led to a strong interest in finding ways to reduce eyewitness identification errors. Psychological scientists have been conducting laboratory studies on this problem for over 30 years and have proposed a number of possible reforms to the procedures used in conducting lineups. Most of the proposed reforms, including the critical requirement of double-blind administration (the administrator does not know the identity of the suspect), have not been considered controversial in principle and many jurisdictions across the United States have adopted them. The use of a double-blind (DB) sequential rather than a DB simultaneous lineup procedure, however, has engendered controversy, a controversy that has unnecessarily held back the adoption of non-controversial reforms in many jurisdictions. The sequential lineup shows lineup members to the witness one at a time and asks the witness to make a...