Rickrod,
Is the house-sitter a relative? If he is the authorities might not understand if you kill him.
As my brother-in-law used to say, "Nail his privates to a stump, douse em with lighter fluid, set em on fire, and hand him a rusty razorblade to cut em off with!"
Someone like that shouldn't be allowed to pro-create.
Sincerely, Shuckins