Expert believes brand remains strong but force's communication strategy is failing and needs to be reviewed.
Police top brass have suffered from communications cock-ups in the past 12 months. Yet they insist there is no need to change the way they talk to the media and the public.
Police gave out incorrect information on the muddled Roast Busters investigation. And after publicity in the Herald last month, they changed a road safety commercial that wrongly blamed a truck driver for a serious motorway crash.
A bigger illustration of the problems in police PR was the eulogy at the funeral for Detective Inspector Bruce Hutton, written by communications staff, which said he had "integrity beyond reproach".
A Royal Commission of Inquiry found Hutton had planted evidence used to wrongly convict Arthur Allan Thomas of the 1970 murders of Harvey and Jeannette Crewe. The highly political eulogy was delivered by Deputy Police Commissioner Mike Bush, who will replace Peter Marshall as Commissioner in April.