HermitKermit,have you perchance read a book called "The Black Hand" about a former high ranking member of the 'Mexican Mafia' aka La eMe?
It has a couple of interesting chapter about David Barron and another guy called Jose Alberto "Bat" Marquez...it says that the two of them eventually wanted to tax the AFO 50% of all their business and if they refused they would go to war with them.Of course we know what happened to Barron,and "Bat" was later arrested.I wonder if they could have pulled it off though...