A lobby group backing a woman who laid a complaint against a senior Auckland police officer believes an employment investigation now underway should end with him losing his job.
Detective Inspector Mark Gutry was stood down in December last year after a woman, who works as a prostitute, made a complaint of a sexual nature last year.
He remains off duty, pending a separate employment-related inquiry - a code of conduct investigation.
Shannon Parker, who is the president of the Police Corruption Association, told Radio New Zealand's Morning Report programme on Wednesday the complaint was taken seriously and the police carried out a long investigation.
Ms Parker helped the complainant take her case to the authorities in June last year.
Detective Inspector Gutry has overseen a number of high profile cases, most recently the Rae Portman murder investigation.
Counties Manukau District Commander John Tims said on Tuesday that detectives from Wellington were called in and found that there was insufficient evidence to lay any charges.
The case was reviewed by the Wellington Crown Solicitor.
Mr Tims said a code of conduct investigation has begun but declined to comment further, as the matter is now an employment issue.