Hm, just being in your house is justifiable for lethal force?
http://law.onecle.com/new-york/penal....20_35.20.html
NY State has a weak castle defense standing. You have a duty to retreat, but are allowed the use of lethal force if you are directly being threatened.
I'm not taking what you said out of context. I'm applying it's proper context.
Again, read NYS Penal Law on the matter. Talk to a lawyer, see what they say. They'll explain NYS's castle doctrine, and maybe in better words than I can.