Segregation is not only used a punitive or protective mesaure, it is often givin to inmates out of spite and in some cases torture leaving people naked in their cells during winter time leaving the lights on in a cell 24/7, anyone who has been sleep deprived can attest to what happens to your mind, guys go in normal and intelligent and after a few months they are talking to themselves and throwing feces at guards ,denying an inmate a shower or phone call or visit because a guard had a bad day, the kangaroo court disciplinary hearing they try to justify as fair, the federal govt with there 95% conviction rate wishes they had what the corrections dept has going on, the list goes on and on from hiring 20 year old to deal with 45 year old convicts to staff just not giving a F, having guys with life sentences in the same mods and cells with misdemeanors and short timers is asking for problems,