Police are searching for Elbert Kyung Ma (pictured left). Detectives say the victim, 22-year-old Brian H. Lee, was attacked over an unpaid debt.
Lee was stabbed several times on his upper body at about 10 p.m. on May 10 in the parking lot of the 24 Hour Fitness at the Buena Park Downtown Mall.
Hall was transported to UC Irvine Medical Center in critical condition, where he died.
Authorities say Ma is 5 feet 6 inches tall, 153 pounds, with black hair and brown eyes. He is currently wanted on a parole violation.
If you have any information, call the Buena Park Police Department at 714-562-3847.