Someone should have gotten behind him early on and yelled BOO! Police could have gone home for dinner.

DNC didn't want to address this at the time... because this is how they operate normally.

What a crock... The light was assault, they were asked to stop and wouldn't, force can be used to stop an assault.
Then they assault the woman to say stop filming.
Then the police arrest the protester because he wanted the police to do their job. The cop said he would arrest him if he pressed the issue. What so if I attempt to file a complaint with the police I am breaking the law? And then the cop says the other guy has a witness. WTF? The protestor has multiple witnesses and a videotape.