Marlon Jones was added Thursday to the FBI list as a suspect in the killing of four people at a West Adams party last month.
Police say he was caught following a tip. A $100,000 reward was offered for his capture and is expected to be paid, officials said.
Police stopped the vehicle he was in Friday on the the 110 freeway. Officers pulled over the vehicle near the Adams Boulevard exit and a male passenger fled on foot, jumping down off the freeway onto 33rd Street but was caught within 20 minutes.
After his arrest, he was seen limping and was loaded into an ambulance, possibly from jumping off the freeway as he fled officers.