Sergeant McManus
Background
McManus is a Sergeant in the police department assigned to Scotland Yard.
During the events of An American Werewolf in London (1981) played by Paul Kember
Inspector Villiers and Sergeant McManus enter Doctor Hirsch's office. They ask him what David Kessler may have told him and Dr. Hirsch brings them to speak with David. David tells them he and Jack Goodman weren't attacked by a man, which at first Sergeant McManus agrees with him as being unlikely. Inspector Villiers tells David they have the autopsy report and two witnesses which disagree with him and tells him the case is closed. Dr. Hirsch has a meeting with Alex Price, Inspector Villiers and Sergeant McManus, but Inspector Villiers does not believe David was involved in the murders. A group of Assorted Police arrive along with Inspector Villiers and Sergeant McManus at the pornography theater. David breaks out of the theater and bites off Inspector Villiers' head, before running off.