I spoke the other day with an ex-con who is now gearing up his studies into prison ministries. He has and, promises, will continue to fight for the legal rights of Maryland Deaf prisoners. Apparently, the lack of communication regarding new rules and regulations, changes, et al was the primary reason for Deaf prisoners being thrown into isolation or "the hole." It was easier for a prison guard to put the deaf prisoner "out of sight and out of mind." Over the past few years, sweeping changes were made in that Maryland, now, has a $300,000 budget set aside for deaf prisoners.
There are more visual information delivery systems (LED scrolling message signs), interpreters present for important meetings/gatherings, and each deaf (or "hearing impaired") inmate receives a personal pager (like a Sidekick) that informs them what is announced on the P.A. system (meal times, bed times, this time and that time).
It was admitted by him that it's still very hard to be a deaf inmate. The dynamics of a deaf inmate being constantly left out by the general prison population. Because the guards and other inmates are not conversant in sign language (of any kind), it is, by default, always the deaf inmate's fault.
"Don't ever go to prison," he told me. Not that I'd planned to, anyway.