Diosado Gumbayan, 73, was found dead early on June 3, 2025, on the 4600 block of Olive Street at the edge of the Swan Canyon area in City Heights. A witness heard a single gunshot around 3:23 a.m., looked outside and saw a man lying in the street with another figure dressed in all black standing over him before that person fled on foot. Officers found Gumbayan between two parked vehicles and pronounced him dead at the scene.

Detectives canvassed the canyon and surrounding streets, collected surveillance footage and witness statements, and developed leads pointing to a teenage suspect. On June 5, officers arrested a 17-year-old near Euclid Avenue and El Cajon Boulevard; the youth was booked into San Diego Juvenile Hall on suspicion of murder. Authorities did not disclose a motive.

Anyone with information about the shooting, the person seen in all black, or movements in the area that night is asked to contact investigators or Crime Stoppers.