Harvey Romero Jr., a 20-year-old from Garden Grove, left a graduation and birthday party in a car with four other people inside Friday night.
At about 10 p.m., the car stopped on Santa Catalina Avenue in Stanton and the people inside started looking for a friend in the area. They talked to a group of six to eight men on the street. One of the men on the street pulled out a gun and fired three or so shots into the car.
Romero was hit in the face. He later died.
The car's occupants flagged deputies at Chapman Avenue and Santa Paula Street to get help for Romero.
The murder victim has no known ties to gangs, according to sheriff's investigators.
Later that night, an SUV believed connected with the shooting was pulled over, but two men inside bolted, running into a nearby apartment complex. They got away.
On Saturday night, SWAT team members searched homes in Anaheim and Westminster for two possible suspects.
Sheriff's officials then announced they are looking for Jorge Rafael Huante for questioning.
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He is described as 19, Hispanic, 5 feet 9, 180 pounds, with black hair and brown eyes.
Anyone with information about Huante or the shooting is asked to contact the Orange County Sheriff's Department Homicide unit at (714) 647-7055 or (714) 628-7170 after hours.