After a distinguished 33-year career with the Salem Police Department, Chief Mary Butler moves to a new position in the communitySALEM, Mass.—Salem Police Chief Mary Butler today announced that she will retire from the Salem Police Department on July 31, after 33 years of service to the community as a police officer, including the last five years as Chief.“Throughout her career, Chief Butler has demonstrated the utmost professionalism in her approach to policing and true leadership in the department,” said Mayor Kim Driscoll. “Salem and our police department have been well served by Chief Butler.