Drug cartels are on the decline. Rise of the Warrior Cop is directly correlated with centralization of power and the influence of police unions over politics and public spending.
It's also correlated with the change from the US military Soldier's creed, to the "Warrior ethos" [0].
The differences are quite interesting: The soldier swears to always act in ways creditable to the service and the nation, recognizing it as a honored profession not to be disgraced.
While for the warrior the mission always comes first. Honor, credibility, disgrace? Not even in the vocabulary, replaced with "deploy, engage and destroy the enemies of the US, in close combat".
Are you just saying that because weed is being legalized?
Economic inequality sure isn't in decline, and there are a lot of 18-24 year old uneducated men out there with nothing to lose. The turmoil in places like Venezuela and Colombia leaves power voids that cartels step in to fill.
The person you replied to did make a claim with no evidence, but so did you. What about the southern border, do you have a reliable citation for something bad happening there compared to 10, 20, 30, 40 years ago?