There's a whatsapp video doing the rounds of a young guy named Willem Petzer explaining what he witnessed regarding the shots fired and why the Nyala (Casspir?) was being pushed around and the cop car turned over.
According to the video , the cops shot 3 rounds towards the protesters after the boere forced their way into the courthouse after the peaceful protests were finished. A police Nyala then came crashing into the wall of the court house, apparently aimed at some of the protesters. The protesters then pushed the Nyala back towards the gate. A police car then made its way into the court-yard aimed at the protesters at which point the protesters overturned the vehicle. The police Nyalas fled and the roads were blocked off by tractors afterwards to stop any further action by the cops.