US LEOs are big on traffic stops + delay tactics to buy time to have the drug dog arrive and sniff a car. Back when the show "Live PD" was on it was used heavily and officer calling a "hit" on the dog in some areas sometimes seemed like a stretch.
Coworker of mine was a sheriff deputy in Indiana and he confirmed this was a common practice.
Coworker of mine was a sheriff deputy in Indiana and he confirmed this was a common practice.