[5] The perpetrator, 20-year-old Tyler James Peterson (March 6, 1987 – October 7, 2007), who was a full-time deputy in the Forest County Sheriff's Department and a part-time officer with the Crandon Police Department, shot and killed six people and critically injured a seventh before committing suicide.
[6] One of the victims, 18-year-old Jordanne Michele Murray, was Peterson's former girlfriend, and it was believed that a dispute within the apartment motivated the shooting.
[1][2] [a] Peterson, who was not on duty at the time of the shooting, entered an apartment complex where a homecoming party was held at approximately 2:45 a.m. CDT.
Peterson fled the scene and was confronted by authorities at a cabin later that day.
All victims were either students or recent graduates of Crandon High School.