UCSB police arrested 20-year-old Lompoc resident Christopher Tyrese Maxwell on Friday after he allegedly fired a gun during an argument in Isla Vista. According to the police report, Maxwell was involved in a fight with several subjects close to midnight in the 6600 block of Del Playa Drive, when he pulled a gun from his waistband and fired a single shot. No one was injured, and the round appears to have struck a cement walkway nearby. Maxwell fled, but officers soon caught up with him. A search of his backpack turned up a revolver with one spent round and the serial number filed off. He was charged with four felonies and booked in Santa Barbara County Jail with bail set at $250,000.