Alberta RCMP investigators suspect a deceased serial sexual offender and killer may be connected to the unsolved murders of four young women in the 1970s. The historical homicide unit is investigating the potential link and believes there may be additional unsolved homicides related to the individual. Police plan to hold a news conference on Friday in Edmonton to discuss their investigation. Meanwhile, the Calgary Police Service will hold a separate news conference at 1 p.m. local time in Calgary. This breaking news highlights the ongoing efforts of law enforcement to solve cold cases and bring closure to families of victims.