Using her training and skills as a nurse, Elizabeth Wettlaufer used insulin to kill 8 elderly people in residential care facilities. Ridden by guilt after her first murder, she confessed to her girlfriend, who did nothing. Continuing her killing spree after struggling with obsessions of injecting her patients, she confessed again, and again, and again. Finally, after confessing for the 5th time, she was brought to justice. Listen as Coral and Dusty describe how OCD may have played a role in this nurses deadly obsessions.