On August 2, 2017, 15-year-old Derek Cosme was killed inside a Williams Street home in Glen Cove, New York, when a legally owned revolver discharged while he and two friends were handling it. The single shot struck Derek in the temple; he was pronounced dead at the scene. The gun belonged to a resident of the house, a retired Nassau County corrections officer who is the grandmother of one of the teens.

Derek, known as Go-Go, was the youngest of five children and was about to start his junior year at Glen Cove High School. His two friends ran to a neighbor’s home rather than calling 911 directly; the neighbor contacted police, and the teens cooperated with investigators and led them to Derek. Detectives focused on how the boys accessed the loaded firearm and on the timeline between the shooting and the emergency call. No charges had been filed at the time of the initial reports and the investigation was ongoing.

If anyone knew Derek or has information about where the firearm was stored that night, please share what you know.