4-year-old Gavin Thompson of Liberty, Pennsylvania, was at home with his father, a police officer, and two of his four siblings. Gavin found his father's service weapon which was being kept in a closet. Gavin fatally shot himself in the head.
The Allegheny County District Attorney's office will determine if charges will be filed against Officer Thompson. In 2009, the office brought charges of involuntary manslaughter and child endangerment against Michael Lanese after he left his twin 9-year-old sons alone with a rifle and told them to clean the gun and put it away. Instead, the boys took out ammunition, played with the loaded gun and while unloading the rifle one twin unintentionally shot and killed the other.