I'd like to point out a minor bit here.
There was no physical evidence at the scene that indicated the drug pusher had been hit during the shooting on this side of the border. All that anyone has is his testimony (paid for with money, status and immunity from his own criminal acts) that he was shot on that date and by that particular Border Patrol agent. There was no treatment North of the border to confirm he had even been wounded that day.
If the individual in question, wonderful fount of objectivity and truth that he is, did not get wounded on that day then the worst offense the Border Patrol officers committed was a Departmental policy violation of failure to report the firing of a weapon.
Would not this contention provide something called a reasonable doubt? Of course drug runners who assault Law Enforcement Officers ALWAYS tell the whole and unvarnished truth...
Concho,
Something about that bit you pasted is this. That statute only gives the listed positions the right to enforce Texas STATE laws. It only grants them the authority to arrest etc. for Texas state felonies. It has nothing to do with the Federal status and authority to enforce Federal statutes. In other words Texas has nothing to say about them enforcing immigration and customs violations. Federal law trumps State law in that regard.
Example, without that statute if a FBI agent happened to interupt the robbery of a convenience store he could not arrest the suspect without that law you posted. It wouldn't be a federal violation and he would have no arrest authority other than possibly the citizens arrest situation, if that exists in Texas. I assume it does.