Drugs seem to be the common thread with several of the recent expats reportedly found in pozos. Drugs lead to people who are dealing with large sums of cash, guns and people who are under the influence of those same drugs and or alcohol who become very paranoid.
Drugs affect people in different ways - just like alcohol. There are happy drunks, morose & crying drunks, sleepy drunks and violent drunks - same personalities with drugs.
In college in the late 60s in CA we all were exposed to drugs and our group knew to stay away from two friends when they were high - 'little' Jimmy and Whitney. Jimmy didn't know when to stop & wound up insane in Redding, California and Whitney, was the violent type, who landed in prison in Arizona. Best to just no (to drugs) - now it's only my Ron Barceló.