No charges will be laid in relation to the death of a man in Otago Corrections Facility four years ago.
Jai Davis, 30, died in a prison cell in February 2011 from a suspected drugs overdose.
A review into evidence given at an inquest last year found there was "no new evidence that would give rise to any criminal liability which could lead to a prosecution", Inspector Steve McGregor of Southern District Police said today.
"The Crown has completed a review of the evidence presented at the coronial hearing in December last year and also a review of all previously available evidence," Mr McGregor said.
"The review found that the evidence fails to meet the standards required by the Solicitor-General's prosecution guidelines and that no charges against any individual should be laid."