He’s 18. It’s disguised as choc squares and obviously it’s an illegal substance. He’s away atm. I had gut feel from recent conversations and from the shape and feel of package and opened it. I don’t usually open other people’s post of course but this is my son’s welfare, also my money and my home address. I’m trying to work out best approach to deal with this. Any advice? It’s the first time he’s done this.