This is not news
I live in Baton Rouge, on I-10 - the main (and only interstate) that runs directly from Texas (and thus the Mexican border) to the Eastern coast of the US. The local newspaper regularly reports drivers on the interstate stopped for minor offenses like changing lanes without indicating and the police finding large amounts of drugs in their vehicle after "becoming suspicious" and searching the vehicles.
It happens so often, and the discoveries are so fortuitous, that the only rational explanation is that someone, somewhere, is telling the local police to be on the lookout for specific people and vehicles - or cell-phones, traveling through Baton Rouge.