GM Monday, February 4, 2013 9:35 p.m. It was always an unnerving thing when police sirens pierced the night air, blue and red lights washing over everything with a sudden sense of danger and urgency. The West End was no stranger to violent interludes, but somehow tonight seemed different. The overcast and starless sky only made the scene unfolding on the streets worse. It began with a 911 call, two blocks away from an out of the way sports bar, someone heard something that sounded like gun