Check Mexico for the perps. Or maybe even Santa Ana which is over 75% illegal aliens.
I think people get the impression, from the movies, that fights can go on and on, with kicks and punches being exchanged, and both parties walk away unscathed except for a few bruises. The assailants found out, during this altercation, that kicks to the head can be lethal. They should get multi-decade prison terms as a deterrent.