After nearly a week and a half of peaceful protests, the first arrests occurred as thousands of protestors marched through lower Manhattan on September 25th, 2011. This is the when the first reports of police brutality began as protestors were maced, tased, and assaulted. The accompanying video shows the now infamous video of NYPD Officer Anthony Bologna macing non-violent protestors. He was docked 10 vacation days as a disciplinary action for his brutality.
This was the first clash of many between Occupy protestors and an aggressive police force.