Under 25 white adults are often given a break in sentencing. See enough stories and it’s an easily spotted pattern.
But 27+ yrs old, you gotta have your shit together.
Non-white’s another story altogether. But for whites, you get a bit longer to grow up.
I could pile a bunch of stories at you. Maybe I’m seeing a phantom pattern. But with stuff like “BRAIN NOT FULLY DEVELOPED UNTIL 25″ crap and people writing about raising the age of majority to 21/23/25, it’s mostly a sense I have of “attitudes”.
I don’t know if anybody did a study. They should though.
(common socialization leads to those patterns btw, as they’re US patterns of brains correlating with criminal peaks. But same patterns not found in Thailand (I think it was Thailand) where crime spikes are late 20s and not mid-teens/early 20s as in the USA).
Important note: That study is FEDERAL.
There is also:
50 individual STATES that can get separate analysis
3007 individual COUNTIES that can get separate analysis
All of which are run by their own law enforcement and their own court systems.
Then, you have local, and I have no idea how many local judges, cops and prisons there are.
Each and every one has distinct jurisdiction, depending on the crime and how thee local area does things.