Brockton has a new interim police chief, after Mayor Bill Carpenter came out on top of an injunction filed by the police union on Friday. The police union was looking to stop Robert Hayden from becoming interim chief, citing his age. Hayden is 71, but the mandatory retirement age for police officers in Massachusetts is 65. The Plymouth County Superior Court judge denied the injunction, based on a statute that allows an exception on an interim basis. A half hour later, Hayden was introduced as Interim Chief at Brockton City Hall, promising widespread reforms in the next year, from motorcycle patrols around the city to a wholesale “rounding up” of 50-100 of the “worst gangsters” in the city, as well as permanent partnerships with federal and state agencies. WATD’s Steve Burns has more from Brockton City Hall.