4 Women Killed In The 1970s Linked To Dead Serial Sex Offender HuffPostMurders of 2 girls and 2 young women in Canada in the 1970s linked to American serial rapist CBS NewsCanada police say dead US rapist was a serial killer Yahoo! VoicesMore victims sought as RCMP say serial killer linked to four Calgary slayings in 1970s Calgary HeraldA Serial Killer from the U.S. Preyed on Young Women in Canada The New York Times