Thinking that they know that he should be dead. Like they set up the fight near the end. Possibly drugged him. I mean our cameras now can catch some really good detail. I imagine that in this world they are even better. That tied in with a mental analysis they could determine that he has some kind of amnesia. Scans would tell them that he isn't himself nor will he revert. The person they were trying to punish died. Thus they could try to recruit him for something. Either that or the general holding a grudge will want to do something to him. It could be both. Give him some kind of insane mission with a limited crew/team. State that he served his time and welcome back to the military fold. Here is a massive house somewhere in the middle of who knows. More like a bunker and yeah. I don't really know how the military on this world works but those were a few thoughts I had on the situation.