Police followed Sonia's trail from the CCTV near Pal’s house and traced her to the building in Rohini. (Special Arrangement) On Wednesday, seven policemen from Shalimar Bagh police station reached a four-floor house in Rohini Sector 11 in Delhi. It was owned by a woman named Sonia, 45, who lived there with her mother and sister Sonia, police claimed, was a ‘master thief’, accused of at least four cases of gold theft. Her latest was a Rs 1.5 crore heist from a house in Shalimar Bagh. “Since her first house theft in 2008 in West Delhi , she has never been arrested. No one has ever come close,” said a police officer involved in the case. Back at the house, police expected some resistance: family members getting in their way, hi-tech security locks, and even hired muscle. The last thing they expected was four-legged guards — dogs. There were 15 of them: three Pitbulls, four American Bullies and the rest were hybrid breeds. “They were guarding all four floors.…