What's going on?

https://www.indybay.org/newsitems/2014/04/20/18754497.php

"After the speakout and before eating, people tried to leave the barbecue for a peaceful march to the police station and back, with young children holding a banner in the lead. A whole troop of police in riot gear came from out of nowhere, blocking any exit from the park from any side. After several attempts to get around them, people came back to eat the food, with the police still surrounding the park.

After everyone ate, the youth decided to try marching again. The police came right back and kettled everyone again. Then the youth started faking out the police directionally and found a hole in the police perimeter to get through. The march took off with the cops in hot pursuit. The police eventually chased everyone back to the park. But the youth kept playing cat and mouse with police, until the cops on foot got tired of running in their riot gear and brought out the motorcycle police.

After everyone left, the cops sent a story to the press saying that two youths caused a motorcycle cop to tip over, with the bike falling on his leg. They arrested two 19-year-olds for supposedly causing this. This didn’t have anything to do with the march or barbecue, but the police are trying to tie this to this event."