60 minutes did a strong piece a while back, featuring a very frustrated ex senior DEA agent. Who had spent years building a solid case against a large Pharms Co at the center of Opioid production and distribution, only to have The justice Department fail to persue it.
https://www.cbsnews.com/news/ex-dea-agent-opioid-crisis-fueled-by-drug-industry-and-congress/
Quite enlightening from law enforcement perspective. This ties in closely with the experence of my nephew in New Orleans who is a senior DEA field agent there, and see similar frustrations there regularly.
I'll leave you to take from it what you will.
Cheers Richard