A 16-year-old named Angel Sierra was fatally shot inside an apartment in Pomona, California, on Sunday, November 23, 2025. First responders from the Pomona Police Department and the Los Angeles County Fire Department were called just after 5:20–5:30 p.m. to reports of gunfire at a building in the 1300 block of East Pasadena Street/Avenue. Officers found Angel with gunshot wounds; he was pronounced dead at the scene. The county medical examiner listed gunshot wounds to the neck and abdomen as the cause of death.

Detectives from Pomona’s Major Crimes Unit concentrated their investigation on people inside the apartment. Early reports said family members and others were present and investigators were determining whether the shooting was intentional or accidental. Within days, police identified a 13-year-old girl from Long Beach as the person suspected of firing the fatal shot; she was taken into custody and transported to Juvenile Hall and was reported arrested on suspicion of involuntary manslaughter. Authorities have not released her name because of her age, and the motive and precise circumstances leading to the shooting have not been disclosed.

Angel’s mother, Michelle Sardaneta, identified him as Angel Jeremiah Sierra, born February 12, 2009, and a fundraiser was started to cover memorial and funeral costs. If anyone has information about what happened that evening inside the apartment, please share what is known with Pomona police.