Paul Bernardo & Karla Homolka were the Ken & Barbie of serial killers. Their first murder together was of Karla's little sister, Tammy, whom Paul deflowered while Karla held a halothane-soaked rag over her sister's face to make sure she stayed unconscious. Karla helped Paul kidnap, rape, murder, dismember & then dump 3 other teen girls. When Paul began to beat Karla, she turned on him & went to the police. Paul was sent to prison for life, while Karla received a lenient sentence.