Publix managers and shoppers chased and caught a teen suspected of snatching the purse of an 80-year-old woman, Tampa police said. Store video shows a youth grabbing the purse and running as the woman held on. She grabbed her 81-year-old brother and both fell to the ground. The suspect left the store at 2427 W Hillsborough Ave. and got on a bike, but a customer dislodged him. Yoandry Perez, 17, of 4211 N Coolidge Ave. was arrested on a charge of armed robbery. Police say he had a knife in his pocket. Perez, who was supposed to have been on house arrest, was taken to the Juvenile Assessment Center.