Adrian Phillip Casas, 30, of Whittier, California, was fatally shot outside a family gathering on May 13, 2017, in the 10300 block of Lock Avon Drive in West Whittier-Los Nietos. The shooting happened just before 8 p.m.; despite efforts to save him, he died shortly after the attack. The Los Angeles County coroner listed gunshot wounds as the cause of death.

Investigators concluded Casas was targeted in a deliberate act of violence, though the motive remained unclear. Law enforcement conducted witness interviews and collected forensic evidence, but no arrests were immediately announced and the case remained under investigation. The death had a deep effect on his family and the local community.

Anyone who attended that gathering or has information about the shooting is asked to come forward to assist the ongoing investigation.