<human>: On Mayday 2013 in Seattle, my friend (16) participated in the protests non-violently, flashbangs or some sort of concussion grenades were thrown near where my friend was standing, disorientating him and causing him to be unable to respond to the officers' commands to disperse. He was arrested for "Failure to disperse," and held in juvie for three days before being released. No charges were pressed.

Now, more than a month later, they've come back and given him a court date saying that they've got evidence now that he "failed to disperse" and they're pressing charges against him. The people around him were vandalizing property, but he was not participating in that.

Is there any hope for him to get out of this one? He wasn't one of the people breaking things, nor was he violent towards anyone else, including the police. He already served three days in juvie without being charged (I don't understand how they were allowed to do that).

Can you give me the gist of the text in a nutshell?
<bot>: Minor friend was not violent at Mayday protests, but "failed to disperse" when told to by police, got sent to juvie for three days and released without being charged, now he's being charged.