My boyfriend has killed someone

I have been with my partner for nearly three years, we're meant to be moving in together next month. The other day, he told me he killed a man. He saw a man attacking a woman, and she was nearly dead. So he intervened. This was before we started dating but when I knew him. I have no idea how to process this information at all, I don't know what to do.

Well it depends how you want to view your boyfriend; a criminal or a hero. Criminalistic in that yes, he did kill someone. Heroic in that, he did because he nearly killed a woman. So are you afraid? Or are you proud? If you're afraid and feel unsafe, then y'all should probably break up.

I think it depends on details. How did he kill him. I know ig sounds weird but was it in a mental aggressive way ie... punched the living daylight out of this man or was it a smack he hit his head etc.... I think only you can judge weather this man is a killer or a hero. Just remember this if he gets mad or his personality changes x