In most states, rape is grounds for the use of deadly force. However, justifying deadly force on someone who has entered your home without permission is much harder. You would have to prove fear of greivious bodily harm or death to you or someone in the home you are protecting (in many states, arson of residence, rape, or bodily harm/death are the only grounds for dealy force).
Keeping a screwdriver nearby to plant in his hand after he dies.... that one is up to you.
-Lego