Police said the man was arrested in a drunken state and that the initial indication was that he took his own life.
The Commissioner Shane McLennan says it's the second death in police custody in a month, and he has now ordered a new approach.
This includes the closure until further notice of the Mua Police Cell, the promise of an investigation as a priority, an inspection of the state of all cells, a review of the police custody policy and in-service training on custody management and human rights.
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