Dang, I hate to hear this. I agree on shooting a buckshot full of rock salt shot but also, how old are your in-laws & do they have protection against these type varments? Are they able to pull the trigger if need be? It might be a good idea to have your county police do a random drive thru a few times a night just to check on them. This has got to be scary for them. Here where I live most everybody knows each other & also knows who are the wrong kind & the wrong kind go to town to do their wrong doing's. Everybody I know including myself shoots first & then checks last after dark. You know these dang dope heads prey on elderly folks & it's just gettin worser.