When they demanded money and the man "felt" that he and his family was in danger of losing their lives he could have shot them and would have been no-billed by the grand jury.
You can bet your last buck I would have shot them until the threat had been stopped.
I have no idea why the cops are not calling this murder, but are refering to it as an "oopsi".
Okay, I see from another article that it was at midnight.
That makes it a no brainer. This father would NEVER be billed in Texas for stopping this threat with lethal force.