Yes, they are being expected to be disciplined and moderate in their dealing while carrying out their duties.
You can imagine, after being punched. What warrant them to blindfold him? They are becoming more of a dictator in the society. We have just few good cops
I think the blind fold was their make shift attempt at trying to give medical attention or hid the injury.
But they never knew there was a camera there, if they knew they would have destroyed all evidence