Police lineups in which the eyewitness picks out a suspect from a group of people in the police station are often grossly suggestive, and they give the false impression that the witness remembered the suspect. In another study, students watched a staged crime. An hour later they looked through photos. A week later they were asked to pick the suspect out of lineups. 8% of the people in the lineups were mistakenly identified as criminals. 20% of the innocent people whose photographs were included were mistakenly identified (University of Nebraska 1977).