CHENNAI, Sept 20: A nurse who was relieved of her three-sovereign gold chain caught the culprit, thrashed him and handed him over to the police on Saturday evening. According to withnesses, the victim, Shymala (40) of Ayanavaram was standing at the crowded Taylors Road bus-stop when a youth snatched her chian. She screamed for help, but seeing poor response, she chased the culprit who boarded an MTC bus.