[FITZ]

It depends ---- you actually don't need to wait until someone proves they were a threat, and there have been cases where the owner got off just because they perceived a threat --not because there was proof of a threat. Anyhow in Texas, it's never wise to be on private property at night when you weren't invited.

[dirtboy]

Anyhow in Texas, it's never wise to be on private property at night when you weren't invited.

That is usually sound health advice. It really goes down to the matter of whether a citizens arrest is legal in cases of simple trespass where there is no attempt being made to break into structures or assault the property owner. I would be disinclined to detain in any way illegals crossing private property, and instead report their presence to the Border Patrol.