The family of Stephen O'Donnell have today paid tribute to him and released a photograph.
Stephen, aged 33, died on Tuesday 22 January following an incident at HMP Risley in Warrington.
"Our hearts are broken at the loss of our beloved Stephen. He was a lovely man who was adored by his family and friends. He didn’t deserve to be taken from us in this way, but nobody can take away the memories that we have of him which we will always treasure. We ask that our privacy be respected at this time while we come to terms with our terrible loss."
Formal identification has now taken place and the family are being supported by specialist officers.