That was AFTER he was in the police car and arrested. Did you watch the Wash Post guy's video? According to the local news, people are being arrested just for being outside. One guy and his family had tear gas thrown at them because they would not get out of their own backyard (they videoed it). The police have gone totally nuts.
Someone asked what the police need to do. Tone down the riot gear for God's sake. Stop pointing guns at unarmed protesters with their arms in the air. Stop trying to close air space to keep the media out of the area. Allow the media in. Hire a new PR firm (their press releases are are pretty stupid). Ask for help from the FBI. Be more transparent about the investigation. The governor of MO and the local city officials are strangely silent about all of this. They need to stop ignoring it, and hope it all goes away. At this point, the police are inciting violence. They need to stand down.
Anonymous hacked the police computers and released the dispatch tapes, and if they are true, there has been some very serious misconduct here. The cop who shot the victim immediately called for crowd control, but did not report the shooting or call paramedics. What if he was still alive? He didn't call for aid. The 911 Dispatchers heard about the shooting from the local news. Paramedics was not called for over 4 hours. At the very least, this is some serious police misconduct.