William B. Castillo, 21, was fatally shot on May 16, 2012, in San Francisco’s Mission District. He was found with multiple gunshot wounds and died at the scene. The shooting occurred during a period when the Mission District and the city overall were experiencing a spike in homicides and increased gang-related violence; Castillo’s death was believed to be connected to those ongoing disputes, though motive and suspects were not immediately established.

The San Francisco Police Department continues to list the case as unsolved and has urged anyone with information to come forward, offering rewards for tips that might lead to an arrest. If anyone knew William, witnessed the shooting, or has information about tensions or incidents in the Mission District around May 16, 2012, please contact investigators.?