That is a famous picture, the guy in the center is an undercover cop, forget his name, but the location is in one of the two hot gathering spots for Hamilton mobsters. I am leaning towards the corner of the espresso shop, but I am not completely sure.

"I have this Nightmare. I'm on 5th avenue watching the St. Patrick's Day parade and I have a coronary and nine thousand cops march happily over my body." Chief Sidney Green