Then it might be easier to catch him -- although he may have fled into Mexico by now but if he's been living on the USA side, then likely they can find information on him --- who he was working for --- and the company that recruited this load of illegals --- and all should be made to pay heavily for their involvement in this kind of crime and destruction.
I sincerely hope so, but my gut feeling is that he is already back in Phoenix. I'm sure he knows this area well, he'd have to in order to evade pursuit down by the canyons and here in town. He probably made it to one of the safe houses just southeast of the crash scene, shed the pony-tail, changed clothes, and had a friend drive him out. Hopefully fingerprints will shed some light.