Of course they had to beat him! Their Psychopaths that are give a Badge and gun.
The man Surrendered so they wouldn't blow his eyes back into his Brain..... (sometime they still do)
But they Beat the Shit out of him BECAUSE
1.) They have to show that they are Gods
2.) They had to show him he was a Slave.
3.) All police are purposely trained to hate the public and treat the public as the enemy instead of the thing their suppose to protect.