Dan,
If you look thru the link Bird posted, it's clear from 9.41 and 9.42 that in Texas a person can use deadly force to prevent theft at night, or even criminal mischief for that matter. But as you point out there can be repercussions, other than criminal arrest and trial. This is about as good of an opening as I'm gonna get to provide an update to the chicken thief case.
The media has tagged the dead youngster "the lost boy". He had lived with his mother, who up and moved away while her son was absent. Although she didn't know where he was, she said she was not concerned because there was "lots of family" where he could find a place to stay. He ended up with his father, who booted him out when he and a friend stole money from the friends father. He then went to live with his 19yo sister, who also threw him out when he stole from her. People from the school and from Pop Warner football, that he was envolved with for a time, both tried to help this young man. Both have said that the parents interaction with their son was nil.
The Police still have not charged the home owner, and right now it does not look like there will even be a grand jury investigation. Yesterday on a talk radio program the mother stated that her son was not the criminal, it's the home owner who is the criminal. She is talking to a lawyer about a wrongfull death law suit.
IMO, she could better use her time writing a book. I'll even give her a tittle for it. "How To Raise a Criminal".
Dan, if you have hung thru this long winded story, even though the home owner has the law on his side he is not out of the woods yet, and could have a rough time ahead.
Ernie