Steve Messham
Steve Messham was in Bryn Estyn.
BBC reports "He said police had shown him a picture of his abuser in the early 1990s but incorrectly told him the man was Lord McAlpine".
Steve apologised publicly to Lord McAlpine for the misidentification. It is not known whether the police apologised for their mistake.
A Mail on Sunday piece suggests that Steve may not be a reliable witness.