The Department of Corrections is being criticised for not eliminating a known suicide risk at Mt Eden Prison before the death of an alleged HIV sex-predator.
Glenn Mills was found dead in his cell in 2009, on the day he was due to appear in court on multiple charges, including infecting or attempting to infect with a disease.
He was hanging by a sheet from bars on the window.
Coroner Katharine Greig says 10 other prisoners died in similar circumstances at the prison in a 15 year period beginning in 1996.
She says six coroners' reports between 1998 and 2005 recommended the window bars be modified.
Coroner Greig says failure to do so was a serious omission.
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