Kristin was killed by her ex-boyfriend Robert Cartier on May 30, 1991. The document provides a timeline of Cartier's escalating violent behavior towards Kristin and others dating back to 1976, including torturing animals, assaulting Kristin and her new boyfriend with weapons, and violating restraining orders taken out against him, leading up to him murdering Kristin and then killing himself on May 30, 1991.