actually RA, the Castle Doctrine allows this:
"Castle doctrine" is a legal concept which allows you to stand your ground rather than have to retreat from an assailant who confronts you WITHIN YOUR HOME"
(
http://www.floridatoday.com/sections/emergency/force.htm)
Q. What if someone is attacking me in my own home?
A. The courts have created an exception to the duty to retreat called the "castle doctrine." Under the castle doctrine, you need not retreat from your own home to avoid using deadly force against an assailant. This only applies when you are inside your home.
Example: Two men were fist-fighting in the common hallway between their apartments. One of them shot and killed the other. The Florida Supreme Court upheld the first degree murder conviction of the defendant, rejecting a claim of self-defense.
The court said the defendant could have and should have retreated. The defendant in the above example claimed that because he had one foot in the doorway of his apartment, he did not have to retreat. The court rejected this argument, saying the defendant should have gone inside and shut the door.
The castle doctrine applies if you are attacked in your own home by an intruder or an invited guest. The castle doctrine does not apply when the attacker and the person attacked both have the same legal right to be inside the home, such as husband and wife.