 Examples include Tactical Officers assigned to the city of Boston during court ordered school desegregation, assignment as the primary security agency for the Department of State with the responsibility of providing security and escorts for visiting dignitaries and annual assignments to assist cities and towns during the Boston Marathon.The Metro Police also maintained a full service detective unit to investigate crimes on its primary jurisdiction as well as providing Detectives and undercover agents to area cities and towns, area Drug Task Forces, the (state) Governor's Auto Theft Strike Force, the DEA Boston Drug Task Force, the Secret Service and the FBI.The last chief of the MDC Police was former Boston Police Commissioner William J. Bratton, who later was NYPD Commissioner and Los Angeles Police Department chief.