Teenager out of control and violent

Posted about him many times I'm sure....
15 now, big lad. Got a diagnosis of Aspergers.

Not sure if its related to Aspergers or just general bad teenager behaviour. Like most he doesn't listen, makes a mess, is moody and stroppy. Normal I guess. One thing is he generally believes hes so hard done by and thinks we pick on him. In all honestly, he gets away with murder.

We try not to get into arguments with him. We warn him then we remove PC priveleges. But he wont take and gets VERY aggressive. He just cannot control himself. In the past, hes been violent towards me.

Today, after some typical lazy behaviour that he'd been warned for, he got a 1 day ban. Then he got in my wifes face in a very threatening way. Thing is he would have been back on there by tommorow but hes made it 1000x times worse now.

Hes a big lad. What do I do here? Yes understand teenagers can be a nightmare but surely being aggressive towards your mother is just a bit too far.
Ultimately, I can see me calling the Police one day and getting him arrested.

How to deal?