Now I'm wondering what it's like for people whose lives naturally involve "suspicious travel patterns" but aren't actually doing anything suspicious.

Like, how often do people who live on that rez get pulled over?

> The cops already knew who they were looking for because a car parked at a casino for a couple hours is not suspicious and definitely not suspicious enough to follow.

The above is key to understanding that part, they KNEW who the smuggler was. They just needed a legal reason to pull them over.