Vatsala Mary visited the Koyambedu police station to lodge a complaint after she lost her purse. As she was walking on the police station's verandah towards the crime wing, Mary accidentally stepped on a stray dog sleeping there. Post this, the stray dog allegedly bit Vatsala Mary on her leg and ran away from the spot. Stray Dog Menace in Chennai: Elderly Woman Gets Bitten by Stray Dog After She 'Accidentally' Steps on Canine at Koyambedu Police Station.