Who fired the gun that killed Michelle O'Connell? (Pt. 3) 05/23/2016 1:09 pm PDT Facebook Twitter Comments Michelle O'Connell, a 24-year-old Florida mother, was shot and killed at home. Her death was ruled suicide, but her family insists it was murder. #DailyMystery #Exclusive Related Stories Who fired the gun that killed Michelle O'Connell? Waiting for your permission to load facebook comments.