On February 2, 2023, 15-year-old Omar Espinoza Rivera of Chino, California, was shot during an altercation in the northeast parking lot of Montclair Place mall near the Target store. Officers found Omar with gunshot wounds to the chest around 8:10 p.m.; he was taken to a local trauma center and died of his injuries. The confrontation reportedly began inside the mall when a group of youths exchanged words and then moved outside.

A 17-year-old boy suffered stab wounds in the same incident, was hospitalized in critical condition, later recovered, and was arrested on February 4 on suspicion of murder, being a felon in possession of a firearm, and gang enhancements. Searches and arrests on February 14 in Pomona led to three more suspects being charged with crimes including murder with gang enhancements and accessory after the fact; multiple firearms were seized during that operation. Authorities say neither Omar nor his friends were suspected of gang affiliation. Omar attended Diamond Ranch High School in Pomona and was remembered for his love of soccer and dance.

The motive remains unclear and the investigation is ongoing. If anyone witnessed the altercation at Montclair Place that evening or has information, please come forward.