Right now, if the nation wants to get him to work for him, there might be 4 options :
1) Bringing his targets to whatever location they want him to attack, and bring them out when he's there. Sooner or later, he would find out they're using them as bait, and they might not actually survive each time, but it's not a guaranteed death either.
2) Literally handing them over, either all or some of them
3) Refusing from trying to protect them, giving him his own chances at doing it, but not helping him either
4) Ask that he does certain things, and he gets 'points' for doing so, which he can use to decide how to punish (eventually kill) them