People, whether in the US legally or not, have the basic human right to not have dogs set on them and threatened with death. He has the Border Patrol on speed-dial. This is, BTW, the same guy who paid a settlement of, I think, $100,000, several years ago for similar threatening behavior against several deer hunters on land he leases from the State of Texas (they were there legally).   Coincidentally, they were American citizens, descended from Spanish colonialists.