The reason it was produced in Mexico instead of Indianapolis is that a critical component, red phosphorus, is nearly impossible to acquire in the US anymore.
The anhydrous method of production is now also practically shutdown by the DEA.
Mexico and Canada offer easy-to-obtain critical ingredients.
The reason it was produced in Mexico instead of Indianapolis is that a critical component, red phosphorus, is nearly impossible to acquire in the US anymore. The chemicals for meth can easily be smuggled into the states, and they routinely are. In this case, it seems like they opted for the cheaper labor, south of the border.