You will see a resurgence of killing in the Brownsville/Matamoros area if another drug trafficking organization challenges the current controllers of the Brownsville/Matamoros drug infiltration routes.
Just because the killing has stopped in this area does not mean that drug traffickers have taken up another line of work.
Just wonder if the violent bunch just moved, and why, or if it was something both countries collaborated on.
The drug trade is never going away. As long as there is a market, there will be a supplier.