About 9:10 p.m., Ruiz was sitting in the courtyard of an apartment complex with a group of friends when a male approached the group and fired multiple shots at them, according to a news release from the Los Angeles Police Department.
Ruiz was pronounced dead at the scene. Two others were injured by the gunfire; one declined medical treatment and the other was taken to a hospital, police said.
It's unclear if the gunman ran to a waiting vehicle.
Anyone with information is asked to call detectives at (310) 726-7879 or (310) 726-7889. Those who wish to remain anonymous can call Crime Stoppers at (800) 222-8477.
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