The hanging deaths of prisoners supposedly being held under close observation in cells specifically designed to prevent self harm continues to raise doubts about supervision and monitoring practices in NSW prisons.

Custodial officers did not find the body of Manoa Tupou -- a prisoner identified as being "at risk of self harm" -- for one hour and 44 minutes after his death, despite the fact Tupou was supposed to be on 15-minute observations in a "safe cell" at the Silverwater prison complex. A safe cell (or observation cell), according to a Department of Corrective Services spokesperson, is specifically designed "to minimise the opportunities of self harm, so therefore it’s got no hanging points, they’ve got special blankets, it has camera observation and nothing sharp or unscrewable".