TexasCHLforum.com

At face value, I can't imagine that anyone would think this isn't self-defense, castle doctrine or no. The only salient point I can think of where investigation is a good idea comes to mind when I think about a case in Colorado from 2005:

Husband and wife are getting divorce. Wife moves out and shacks up with new boyfriend. New boyfriend and wife want the husband dead so she can inherit all his property before the divorce is finalized. Castle doctrine is recently passed in CO, so they formulate a scheme: tell husband that she has a box of his stuff, and that he can come over to boyfriend's house to pick it up on the back porch that night while they're gone so they don't cross paths. Boyfriend waits in the dark until husband shows up and picks up a box of stuff, then guns him down with a 12-gauge, claiming that "he had never seen the husband in person before, it was dark, he was in my house, and I was scared." If the husband hadn't told a friend where he was going and for what purpose, and if his phone hadn't kept a record of the wife calling his cell just before he drove over, I'm sure a murder would've gone down as a write-off because of the castle doctrine.

You've got to pick through the trash when you're dealing with trashy people, I guess.