By DEANNA BOYD FORT WORTH -- Police say the tables were turned on two men who robbed a towing business Sunday night when employees gave chase, exchanged gunfire with the suspects and hit one man with their car, police say.One of the suspects, 26-year-old Christopher Aaron Shun Mayo, was arrested on suspicion of aggravated robbery after he was tackled and held down until police arrived.A second suspect fled in a white Chevrolet Caprice and was still at large Monday morning.The robbery occurred at 8:50 p.m.