| William Patrick Fyfe | |
| Birthname: | William Patrick Fyfe |
| Alias: | "The Killer Handyman" |
| Birth Date: | 1955 2, mf=yes |
| Birth Place: | Toronto, Ontario, Canada |
| Victims: | 5–9+ |
| Country: | Canada |
| States: | Quebec |
| Beginyear: | 17 October 1979 |
| Endyear: | 15 December 1999 |
| Apprehended: | 22 December 1999 |
| Sentence: | Life imprisonment |
William Patrick Fyfe (born February 27, 1955) is a Canadian serial killer convicted of killing five women in the Montreal area of Quebec, although he claims to have killed four others. He allegedly killed his first victim in 1979 at the age of 24.
Billy Fyfe was born in Toronto, Ontario. He was raised by an aunt and in 1958 moved from central Canada to the Parc Extension area of Montreal. He lived as a normal child, although friends did have suspicions about the boy as he grew up. As an adult, he worked as a handyman.
DNA evidence on the door frame at Mary Glen's house led police to charge Fyfe for the murders. The Ontario Provincial Police (OPP) arrested him on 22 December 1999, while he was returning to his pick-up truck after eating at a Husky Truck Stop near Barrie, Ontario. He has confessed to only a portion of the crimes that he is suspected of committing.
Fyfe's preliminary hearing began on 6 November 2000. Jean Lecours was the crown prosecutor heading up the case against Fyfe. He is now serving a life sentence in a maximum facility in Saskatchewan. The four last victims he admitted to only after being incarcerated.
He is also suspected by Montreal Police of being the serial rapist commonly known as "The Plumber" who was responsible for a string of violent rapes during the 1980s in downtown Montreal.