NYPD releases video of prostitute accused in $500G diamond heist NEW YORK - Catch her if you can! This is the savvy prostitute who allegedly swiped half a million dollars worth of uncut diamonds from a hapless gem trader - caught on surveillance video as she made her barefoot getaway from a Manhattan hotel, police say. Erika Cooper, 34 - a k a Bianca Williams - is now the target of an NYPD manhunt for allegedly pulling off the April 17 heist at the Cosmopolitan Hotel, where she waited until her john Kurt Kaiser fell asleep before she fled with his loot. Her big mistake was giving Kaiser her real phone number, which cops have used to identify her and dig up mug shots from an earlier prostitution bust, a police source said. When reached yesterday, Kaiser still sounded enamored of the woman who cleaned him out. He confirmed that she's the one in the NYPD photos and said, "She was young, hot, beautiful face, but flat-chested." The 5-foot-9, 120-pound Cooper, who has brown eyes, jet-black hair and pouty lips, first met Kaiser at the Whiskey Park bar on Central Park South.