People really need to research into a case before you debate it. The question and answer time was over and he got pissed and started yelling and screaming and got on a mic and was being threatening. The organizers of the event wanted him out because he was causing a huge scene. The people in charge told the cops to escort him out. The cops followed suit.
Why don't you read the police report that was covered by several eye witnesses
The video Dante posted was cut and scenes were put together so that is not an accurate representation of what happened.