In my opinion, leave him alone. He was dangerous enough once to set you up in a situation where you could have been killed. What might he do now? He may be a changed person, but what if he has changed for the worse? Some jerks get more evil with age. Plus, now you have kids. What if he set you up again and this time your kids were there or were threatened? It's not worth it. Everything has to be different when you are a parent and your kids' safety has to be top of the priority list.
Again, this is just my opinion. I won't blame you if you choose another option. I wasn't there and have never lived through that kind of situation.
My son made this for me: