An analysis of police officers' decisions about whether to refer cases of child abuse for prosecution

Facial composite research has mainly focused on their investigative value. No. comparable attention was drawn to their probative value – the extent to which a composite image may serve as incriminating or exonerating evidence against a defendant. The existing data resulting from mock-juror research allow only cautious conclusions and applies solely to the common law system. Therefore an experiment was conducted involving laypeople (N = 74) and prosecutor apprentices (N = 72). All participants received case materials of a robbery committed by a young male, including the victim's and defendant's testimonies and other evidence. In both samples, the facial composite evidence was manipulated so that participants viewed a composite image that was either a good or a poor match to the defendant. A facial composite that bore a strong resemblance to the defendant influenced the assessment of the eyewitness' credibility in the apprentices sample, but failed to affect other dependent variables. Surprisingly, laypeople ignored the facial composite no matter how well it resembled the defendant. Significant differences in the assessment of eyewitness' credibility, the strength of the defense case, the credibility of the defendant's alibi, and his culpability were found between the prosecutor apprentices and laypeople. The practical implications of these findings are discussed.