New York Police Covertly Join In at Protest Rallies - New York Times

"Beyond collecting information, some of the undercover officers or their associates are seen on the tape having influence on events. At a demonstration last year during the Republican National Convention, the sham arrest of a man secretly working with the police led to a bruising confrontation between officers in riot gear and bystanders."

So the brownshirting of those sworn to serve us, protect us, and in fact FACILITATE our freedom of speech is official.