either the NA or the new government when it is formed. His alleged crimes took place in Afghanistan. He should be subject to their justice. Since he's a fan of Islamic law, he shouldn't mind being subject to it.

Walker wouldn't be the first American to get into trouble by breaking the laws of a foreign country. There are quite a few Americans serving time in foreign jails for things like drug smuggling, theft, rape, etc. There's even one idiot serving time in Peru for helping the Shining Path terrorist group. She should've known better.

If he does somehow get a pass and is allowed to return to America, it'll be interesting to see if he's charged with breaking US laws. It's normally considered treason to engage in hostility against our military in time of war.