I live not far from where this happened. My understanding is the local LEOs are not entirely happy with this situation. It was DPS who fired from their helo. It truly is a shame that people died here.
I think one of the biggest problems with these chases is that the ones running are increasingly using caltrops against those following. It is almost impossible to find all of the caltrops thrown out during a chase and they pose quite the danger the innocent drivers later on.
It is just a mess all around with desperate smugglers vs increasingly militarized police forces.