I am sorry M was not "Christianized"
I am sorry his life went off the rails because he didn't realize how bad it is to LIE and steal. Yes, you could say all people have a conscience. But I don't know about that. A conscience has to be developed. That's where the Catholic faith comes in. I have a conscience largely because of the Catholic faith. God knows where I'd be if I had not been raised Catholic, even though I kind of wasn't.. we just went to Mass on Sunday (and it was a novus ordo Mass!). The rest of the week it was like Jesus never existed... or something. But still, I learned about Jesus from being Catholic and then later I had this interesting conversion experience.
I am sorry M didn't have that, apparently. I still don't know this for sure but no one has mentioned him going to church as a kid or whatever..
Just the same, he is right where he belongs. Society has to be protected from lawless people