To respond to your other comment, homicide rates were falling starting around 1990, and the prison population exploded after that. Something else must be going one here. According to the Federal Bureau of Prisons[1] as of last month 45.3% of the total US prison population is there for non-violent drug offenses. Only 3.1% is for homicide, assault, or kidnapping. In the late 80s and early 90s lots of states and the federal government instituted really draconian sentencing laws.

So yeah, violent crime is WAY down from 1990, drug arrests have been soaring since.

[1]https://www.bop.gov/about/statistics/statistics_inmate_offen...