BOSTON — A firefighter has been arrested for allegedly crashing into a police vehicle and fleeing the scene just one day before retiring.The Boston Globe reports 64-year-old Sean Ingram, of Quincy, was belligerent during his arrest Thursday night.Police say the longtime Boston firefighter allegedly left the scene of a crash on Interstate 93 and expressed his disdain for state troopers during his arrest, calling them "Nazis."