Mario Ramirez was 18 when he was fatally shot in Los Angeles on October 2, 2018. The shooting happened late at night in a neighborhood described as having high crime rates; emergency responders pronounced him dead at the scene.

Witnesses reported hearing gunfire and seeing a vehicle speed away, and investigators treated the incident as a targeted attack. Multiple law enforcement agencies conducted interviews and gathered evidence. In the weeks after the killing several suspects were questioned, and a key witness later provided information that led to the arrest of a suspect believed to have been involved. Reports linked that suspect to a gang and to prior violent offenses.

The trial over the charge of first-degree murder featured forensic evidence, witness testimony, and surveillance footage, with the defense challenging witness reliability and investigative integrity. If anyone knew Mario, saw activity in that neighborhood on October 2, 2018, or has information about the vehicle described by witnesses, please come forward.