I have 2 disagree here. The parents are not really at fault. There are some kids, no matter how well they are raised, they will get into trouble. The only person to blame is the thirteen year old himself. I don't know the exact details for this case but I seriously doubt that the parents rewarded the kid for killing somebody. And if you're going to blame the parents because the kid used their gun to kill somebody the parents could've just had a gun for protection. No matter how much you hide something the kids will know where and how to get it.