The Honolulu Medical Examiner's office has identified the man who was killed in a three-car crash in Nanakuli yesterday, as 39-year-old Aaron Collins of Waianae. A 24-year-old Kalihi man was arrested on suspicion of third degree negligent homicide and second-degree negligent injury, then he was released pending further   investigation.  The crash happened at 2:44 p.m. on Farrington Highway near Auyong Homestead Road. Three others were injured. Police say speed and alcohol don't appear to have been factors in the crash.