How Would The Legal System Handle Jason Vorhees If He Was Apprehended?

Jason Vorhees has never spoken or really responded to people (other than his dead mother). How would handle when asked to plead guilty/not guilty since wouldn't respond? Also, does he even understand his rights?

What defense, if any, could be used for Jason Vorhees?

How would he be held when assuming he attempts to constantly kill the guards and other inmates?

If in a death penalty state, with the current allowed methods, how do you execute someone who can't die?