Los Angeles County Sheriffs Department Homicide Investigators are announcing they have identified...

Los Angeles County Sheriffs Department Homicide Investigators are announcing they have identified the suspect in the murder of a 34-year-old Oscar Medina-Partida in the Unincorporated Los Angeles Area of Sun Village in the Antelope Valley. A 34-year-old Hispanic female was also shot and injured during the incident. Andres Mateos, a 31-year-old male Hispanic, has been identified as the suspect in the murder and attempted murder. A four-million-dollar arrest warrant has been issued for his arrest. Detectives have exhausted all leads and are seeking the public’s assistance in locating Suspect Mateos. Suspect Mateos is considered to be armed and dangerous and his whereabouts are unknown at this time.

On May 12, 2025, at approximately 9:30 pm, deputies from Lancaster Sheriff’s Station responded to in the intersection of 150th Street East and East Avenue R in the Unincorporated Los Angeles Area of Sun Village in the Antelope Valley regarding an assault with a deadly weapon, gunshot victim at the location. Upon arrival, deputies located Oscar Medina-Partida lying unresponsive in a nearby dirt lot, suffering from gunshot wounds. The female victim had walked to a nearby fire station and alerted authorities of the incident. Los Angeles County Fire Department personnel treated and transported the female victim to a local hospital. They also responded to the location where Oscar was located and pronounced him deceased at the scene.

Homicide investigators learned Suspect Mateos, and the victims were involved in an argument when Suspect Mateos armed himself with a rifle and shot the victims. Suspect Mateos fled the location in an unknown direction.

Homicide investigators presented the case to the Los Angeles County District Attorney’s Office for filing consideration. One count of murder and a count of attempted murder was filed against Andres Mateos. A four-million-dollar arrest warrant was issued.

The case is still being actively investigated and no further details about the case will be shared in. order to maintain the integrity of the investigation.