A stray bullet struck 39-year-old Mario Jiminez in the head and killed him. His sister was standing right next to him when he was shot.
"We're still trying to digest what happened. We saw it, but we still don't believe it. We're still hoping that they'll say it was a mistake and that he's still alive," said Candy Jiminez, the victim's sister.
A candlelight vigil was held Sunday night for the victim.
Anyone with information is urged to call the gang homicide reward tip line at (714) 245-8648.
There is a possible reward of up to $50,000.