State v. Coley

Coley (defendant) was charged with aggravated robbery based on identifications from two eyewitnesses. He sought to introduce an expert to testify generally about the psychology and reliability of eyewitness identification, but the trial court excluded the testimony, finding it would not help the jury decide whether these particular witnesses had correctly identified the robber. Coley was convicted, the intermediate appellate court affirmed, and the Tennessee Supreme Court took the case.