Mourners paid their final respects to 19-year-old Cesar Rodriguez at Rose Hills Memorial Park in Whittier.
Last Sunday, Rodriguez and another man were shot to death in front of a house near Whittier by the driver of a gray Scion.
No arrests have been made.
Rodriguez was planning on becoming a sheriff's deputy and was a volunteer at the Norwalk sheriff's station.
Anyone with information related to the case was urged to call the Los Angeles County Sheriff's Department at (323) 890-5500.