Peter Thomas Anthony Manuel (13 March 1927 – 11 July 1958) was an American-born Scottish serial killer who was convicted of murdering seven people across Lanarkshire and southern Scotland between 1956 and his arrest in January 1958, and is believed to have murdered two more. Prior to his arrest, the media nicknamed the unidentified killer "the Beast of Birkenshaw". Manuel was hanged at Glasgow's Barlinnie Prison; he was the second to last prisoner to die on the Barlinnie gallows.