Well, first off, with Krampus being a supernatural being, and the opposite of Santa, I'd make sure his body is still in the attic. If yes, then bury it. But chances are on Christmas Eve, there'll be no grave. And If not, then I have no advice other than to worry. If either of these things happen, make sure to buy a couple Oranges or Apples. If he comes again, which he more than likely will, get your boy to give him an Apple/Orange. When he does Krampus will sit down, converse with your boy, then leave. I've done this before. Christmas 1997. He came to our house a few days before Christmas. Luckily I know my fair share on these kibd of things. My daughter wasn't the best of kids. Always misbehaving. Was sat with her in my Living room. Then down he came. Got my daughter to give him an Apple. Sat down with us, had a conversation then left. Hopefully it works for you too. It's your best bet. Good luck.