Of the 22 police captains in the Boston Police Department, all are male, and all but one are white. For years, minority law enforcement officers' groups have called upon Mayor Menino to change a controversial promotion exam that has been criticized for contributing to the lack of diversity among the Boston police ranks. Recently, Mayor Menino said he'd sink $2.2 million into changing the promotion system. Callie Crossley talks with law enforcement experts about what needs to change in order to have a more diverse leadership in the police force.