The Government has outlined the details of its inquiry into the handling of the case of Tony Robertson, who raped and murdered North Shore mother Blessie Gotingco.
Robertson had been out of prison for just six months when he murdered Mrs Gotingco.
He was wearing a GPS monitor, but victim support advocates say he should have also been physically monitored or under armed guard when he was released in 2013.
He had served eight years for crimes including abducting and sexually abusing a child.
Justice Minister Amy Adams and Corrections Minister Sam Lotu-Iiga have jointly commissioned the inquiry.
Mr Lotu-Iiga said the inquiry would include the Department of Corrections' management of Robertson before and after his release from prison.
"It's to give the public reassurances around this particular case, this high-profile case, as well as the family of Blessie Gotingco."
The inquiry will be led by Mel Smith, a former ombudsman and acting secretary for justice, and is expected to report back by the end of November.