Adult's (N=240) identification abilities were examined under conditions where the suspect's general appearance resembled that of the perpetrator at the time of the crime or was different from the appearance of the perpetrator as a result of a significant change in hairstyle. Simultaneous and sequential lineup procedures were examined across appearance manipulations. A videotaped, staged theft depicting a perpetrator with one of two hairstyles was viewed by participants. Witnesses attempted an identification from a target-present or -absent lineup. The correct identification rate (target-present lineups) was somewhat higher with a simultaneous versus sequential procedure when the perpetrator did not change his appearance. Correct identifications rates were significantly lower when the perpetrator changed his hairstyle across both lineup procedures. Thus, the guilty suspect was likely to elude identification when he changed his appearance following the crime. Correct rejection rates (target-absent lineups) did not differ significantly as a function of lineup procedure or appearance.