Like I said in my other comment, some are more likely to reoffend because their prison time, but other were already more likely to reoffend, especially multiple felons who commit an extremely high percent of all crimes.
Just under 10% – which is certainly a minority, but still enough value that Michael Bury (Big Short investorguy) once had an entire fiscal quarter where his only net-increase positions were in for-profit prison operators.
Lots of money and facilities in private prisons, particularly in This South.
One could argue that's really dehumanizing is the callous disregard the system displays for the victims of such repeat violent offenders.
Warning, I am not linking to the book (it's on Amazon) because no amount of #TriggerWarning can prepare you for the mind of P - A - N - Z - R - A - M [the name of the non-fiction collection of this prisoner's personal letters].
When Mr. P was asked what made him such a monster, he wrote honestly and practically about the upbringing of a serial-killing rapist. Mr. P's EVIL puts JWGacey in the safehouse.