Tonga's Prime Minister, Lord Tu'ivakano, says the police need to win back the trust and confidence of the public after the death of Kali Fungavaka.
Five Tongan police officers and one detainee have each been charged with manslaughter over the death of the New Zealand policeman.
Lord Tu'ivakano says the incident has tarnished the police's reputation both locally and internationally.
The police commissioner, Grant O'Fee, says the police have experienced a difficult few months since the killing of Kali Fungavaka.
Matangi Tonga reports Mr O'Fee as saying police have taken some significant steps while looking at other things they have to do to get the public trust back.