Valente Casas, a 23-year-old resident of Pico Rivera, California, was shot and killed during a Halloween gathering on November 1, 2015. The party, held in the 9600 block of Par Place, attracted 70 to 80 people. An argument between Casas and another man began in the backyard, moved to the front yard, and ended when the assailant fired multiple shots at Casas. Casas was pronounced dead at 12:40 a.m. at the scene.

The Los Angeles County Sheriff’s Department says both Casas and the shooter were uninvited guests who did not know each other before the confrontation. The suspect was described as a Latino male in his early 20s with a shaved head; he was last seen running north from the house. A black vehicle was observed leaving the party around the same time, though its connection to the shooting is unclear. Investigators believe the killing may have been gang-related, but no arrests have been announced and the homicide remains under investigation.

If anyone attended that Halloween party or has information about the suspect, the black vehicle, or other details, please contact the Los Angeles County Sheriff’s Department Homicide Bureau or submit an anonymous tip to Crime Stoppers.