PHOTO COURTESY THE CITY OF ROCHESTER Rochester Police Department officers don helmets and batons during the riots of 1964, the same year the Rochester Police Locust Club negotiated its first labor pact with the city. Around the time that a Rochester police officer pulled out her pepper spray to use on a 9-year-old-girl, Mike Mazzeo, the president of the Rochester Police Locust Club union, pulled out a pen to sign a lawsuit contesting recent appointments by the police chief to the Rochester Police Department’s top brass. Two days later, Mazzeo stood at a podium at the union’s headquarters on Lexington Avenue in blue jeans and a black sweater facing a firing squad of news reporters and stumbled through an explanation of the “psychological trauma” experienced by officers at the scene and blamed the girl’s mother for escalating the incident.