Boden then returned to Montreal to face trial, where he confessed to three murders of Shirley Audette, Marielle Archambault, and Jean Way, and was sentenced to three additional life terms. Boden was sent to the Kingston Penitentiary in Kingston, Ontario, where he began serving his sentence on 16 February 1972. Boden was initially believed to be involved in the death of Norma Vaillancourt, a 21-year-old student killed on 23 July 1968, but denied involvement. In 1994, Raymond Sauve was convicted of Vaillancourt's death and sentenced to ten years in prison.