Looks like these people obviously know what they are doing, and aren't afraid to be held accountable. Most of you guys are focused on why this man was detained without charge, what I find interesting, and very thankful for, is that they didn't arrest the surrounding witnesses, and allow themselves to be filmed (if they're not going to justify their actions, why spare innocent witnesses and let them talk about it). My speculation is, the story isn't as simple as "he posted on facebook, they came for him for that".