John David Guise Cannan is a British murderer, serial rapist, serial abductor and suspected serial killer. He was convicted in July 1988 and given three life sentences for the murder of Shirley Banks in Bristol in October 1987; the attempted kidnapping of Julia Holman on the previous night; the rape of a woman in Reading, Berkshire, in 1986; the rape of his girlfriend in December 1980; and several other abductions, attempted abductions and sexual offences. He became eligible for parole in September 2023, which was refused in October 2023.