A special hotline set up by police to investigate corrupt Christchurch officer Gordon Meyer has already received calls from the public, but police will not say exactly how many other potential victims have come forward.
Senior Constable Gordon Stanley Meyer, 45, offered to make charges against a suspected drink driver go away in return for oral sex.
He also groped an 18-year-old woman he was giving a lift between pubs while on duty in his marked patrol car.
Meyer, who has since resigned from police, will be sentenced next month after pleading guilty in the High Court at Christchurch on Monday to indecent assault and corruption and bribery charges.
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He had been protected by name suppression since the incidents in 2011, but his identity was finally able to be revealed after he admitted the charges.
Assistant Police Commissioner Grant Nicholls said police welcomed the conviction on behalf of the victims, adding that the police investigation remained open.
Now, police have set up a dedicated freephone number, 0800 223 370, for people to come forward with information on the former police officer.
Detective Inspector Tom Fitzgerald confirmed that they had already received some calls, but would not say how many.
Police would not disclose the nature of the calls and whether any further charges were likely.
Meyer is on bail at a North Island address while he awaits sentence next month.