The NYPD's Internal Affairs Bureau is investigating allegations that just hours after the not guilty verdict was issued in the Sean Bell shooting trial, a number of crank calls were made to the home of Nicole Paultre Bell's parents by someone connected to a police union. The calls were both hang-ups or someone laughing--"Ha ha ha"--on the other end of the line. Caller ID identified their source as a line at the Sergeants Benevolent Association's......