[wideawake]

We’ve also learned not to murder anyone in your garage, or you’re going to prison.

[Paladin2]

Once you are dead you are dead.

Don't hang out in someone else's garage unless invited.

[Paladin2]

"Staying off of private property is good advice in any country, he says, it's just that in America, the risks can be more severe."

Given that it was dark, in Texas, the invader would be without any legal recourse (though in Montana he is still dead).