TORONTO (Reuters) - A Canadian sex killer was freed after 12 years behind bars on Monday for her involvement in the rape, torture and murder of two schoolgirls, in a case that horrified Canada in the 1990s. Karla Homolka, 35, was released from prison in Ste-Anne-des-Plaines, Quebec, near Montreal, the Correctional Service of Canada said in a release. Homolka and her then-husband, Paul Bernardo, kidnapped, sexually assaulted, tortured and killed two teenaged girls in the early 1990s in southern Ontario. Homolka, who videotaped the assaults, also drugged her 15-year-old sister so Bernardo could rape her in the basement of her...