He would be in NH:
629:2 Criminal Solicitation. –
I. A person is guilty of criminal solicitation if, with a purpose that another engage in conduct constituting a crime, he commands, solicits or requests such other person to engage in such conduct.
You could maybe make a defense that while attempted suicide is illegal, actually committing suicide is not. Problem is, you can't actually do it without the attempt, and you can't argue that he was soliciting them to kill themselves but not attempt to kill themselves. But oddly enough, there is an argument there that he wasn't encouraging them to try to kill themselves, but to actually kill themselves. If it is an actual successful suicide, there is no crime of attempt.
While you could shoehorn a weird legal argument that way, it is one that you'd have to make to a jury, and the chances that they buy that are almost precisely zero.