The Irish Penal Reform Trust says the death of a prisoner in custody underlines the need for single cell occupancy.
It's after the Inspector of Prisons identified a number of inadequacies in how the Midlands Prison dealt with an inmate two years ago.
The 61 year old, who was serving a four year sentence died from a heart attack believed to have been brought on by blunt force trauma to the head.
He had recently been moved into a shared cell with a prisoner who was later found to be distilling alcohol in his room.
Executive Director of the IPRT is Deirdre Malone;
The Inspector of Prisons has identified a number of inadequacies in how the Midlands Prison dealt with the death of an inmate 2 years ago.
Judge Michael Reilly makes the finding in his report into the death of a 61 year old man in Februray 2013.
The man who was serving a 4 year sentences died from a heart attack believed to be brought on by blunt force trauma to the head.
Sinead Spain reports;