John David Guise Cannan (born 20 February 1954) is a British murderer, serial rapist, serial abductor and suspected serial killer. A former car salesman, Cannan was convicted in July 1988 of murder and multiple sexual offences, abductions and attempted abductions. He was 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 is eligible for parole in October 2022.