Local media said Jenkins hung himself, but Canadian police refused to confirm details of his death after finding his body in the motel room on Sunday.
Authorities in California had charged Jenkins, 32, with the murder of Jasmine Fiore, whose mutilated body was found in a suitcase stuffed into a trash bin just over a week ago in the town of Buena Park outside Los Angeles.
Police said Fiore's fingers and teeth had been removed to make it harder to identify her body, but investigators were able to determine who she was by using the serial number on her breast implants.
Jenkins appeared in the television show "Megan Wants A Millionaire" on VH1, which premiered after completing production in March. Airing of the program has been suspended because of Fiore's death.
Jenkins, who is from Calgary, Alberta, was among 17 men described as millionaires who competed for the affections of former Playboy model Megan Hauserman. When introduced on the show, he was said to have a net worth of $2.5 million.