A consolidated appeal, Abney and Allen, taken by defendants who sought to introduce, at trial, expert testimony regarding the reliability of eye witness identification. The issue before the New York Court of Appeals was whether the trial judges had abused their discretion in disallowing the testimony.
The Court of Appeals reviewed a trio of controlling cases; Lee, Young and LeGrand. In Lee the Court held that rather than such testimony being admissible per se, the trial court had discretion to admit or exclude expert evidence on the reliability of eyewitness identification. In Young the Court held that such discretion was bounded by whether the expert could tell the jury something significant they would not ordinarily be expected to know already. Most recently, in LeGrand, the Court held that "where [a] case turns on the accuracy of eyewitness identification and there is little or no corroborating evidence connecting the defendant to the crime, it is an abuse of discretion for a trial court to exclude expert testimony on the reliability of eyewitness identifications if that testimony is:
(1) relevant to the witness's identification of defendant,
(2) based on principles that are generally accepted within the relevant scientific community,
(3) proffered by a qualified expert and
(4) on a topic beyond the ken of the average juror"
The Court applied these principles to conclude that the Abney trial judge had abused his discretion while the Allen judge had not.
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