If he was as bad a$$ as the reports suggest it could be justified. If he’s on top of an FBI agent pounding his face I’d put a couple of rounds in him.
There is always the remote possibility they wanted him shut up for good.
Waterboarding was anathematized, at least for moslems, by the kenyan because the information so gleaned was detrimental to the policies of the Administraton.
I would have too, but poor George Zimmerman is going through hell because he did exactly that. I doubt we'll ever really know the truth about what happened in that apartment.