The report in the tele mentions a couple of times about how the incident started due to ST believing he was being filmed. The obvious interpretation of that is that ST has reacted aggressively and that was the cause of the scuffle. As the aggressor if anyone should have been charged it should be him (actually none of it was aggressive enough for either to be convicted of criminal behaviour). The police need to take a look at themselves here.
They were heavy handed and not interested in the truth.