The ones a few years back were cut up and mangled badly, and found out in the desert around what loked like a ritual site.
These ones look like they were mainly shot execution style.
Perhaps they have become more gentle and compassionate society.
They were sacrificing people to Satan in return for protection for their drug smuggling and other criminal activities. It was pretty horrible what they did.
In the end they got caught when they simply drove through a roadblock of Mexican police. When the cops chased them down and arrested them they couldn't believe that the cops could actually see them. They thought that all their sacrifices to Satan had made them invisible.
I was living a few miles down the road at the time. My dear old white-haired Mom in NY called me up to make sure that I had enough ammo for my AK-47.