Researching signs of corruption in border towns.
This article is about an Arizona checkpoint that gets a lot of grant money, but only accounts for very few arrests of illegal aliens. One scientist who must cross a checkpoint twice daily to get to his observatory has documented violations of law and signs of corruption. Seems for the little benefit to capturing aliens a lot of the locals are getting lots and lots of overtime for manning the checkpoint with CPD. Most arrests are for minuscule amounts of pot. (when you get grant money you have to show a return on the investment, you see)
The scientist at one point was dragged from his car and thrown to the pavement - for questioning the basis for his being detained.
https://slate.com/news-and-politics/2018/05/terry-bressi-wants-to-take-customs-and-border-protections-internal-immigration-checkpoints-to-the-supreme-court.html
This article was suggested reading before you watched the video about a First Amendment Audit
Auditor is a former Military Police
https://www.youtube.com/watch?v=kyG_tmCaA_4