Just a Guess

The BBC on a big anti-drug operation in the US:

Police in the United States have arrested 45 people they accuse of belonging to the Mexican drug cartel La Familia Michoacana.

Agents also seized cash, guns and drugs as part of their operation against the cell, based in Atlanta, Georgia.

This is just a hunch, as I've read nothing, but I suspect that the vast majority of those arrested were American citizens who are only marginally closer to La Tuta and the rest of the hierarchy than you or I.