Biggie Slim is a character portrayed by Omar J. Dorsey in the ABC crime series Castle. Biggie Slim was the driver and boyfriend of rapper Nicky Jay. He was also the murderer of Naomi Allen. Biggie Slim had a cousin who worked in an armory. That connection, along with one to Nigel Wyndham, Deputy General at the New York British Consulate, who once lobbied on Biggie Slim's behalf when he started up Internet start-up, for which he was never charged for, meant he saw an opportunity with the diplomatic pouch.