Barrett Michael Shirley was 23 when he was fatally shot on September 5, 2014, in the Elm Grove subdivision in Humble, Texas. He ran into a residence on Garden Village Drive after being shot outside, collapsed, and was pronounced dead at the scene. Neighbors heard a sound they thought was fireworks and saw a car speed away.

Barrett was born May 1, 1991, in Houston and lived in Kingwood. He attended Kingwood High School and worked as a lab technician at Geo Science in Houston. The Houston Police Department identified 18-year-old Hunter Ryan Hamilton Woods of Kingwood as a suspect; he was arrested September 19, 2014, and charged with Barrett’s murder. The motive has not been released.

What details about that night or the people involved might help explain why Barrett was shot?