Based on the accounts of several girls whom Surinder Singh, one of the prime suspects in the Noida murders, approached are revealing fresh details of his modus operandi. Thirteen-year-old Ashtmi says that she still remembers the day when Surinder, alias Satish, working at house no D-5 in Sector 31 called her in to work there on the pretext that their regular maid hadn't turned up that day.