A whistleblowers' hotline set up to root out unscrupulous police officers is averaging about two calls a month.
Figures obtained under the Official Information Act show that since the anonymous phone line started in 2010, there have been 12 reports about alleged corruption and 10 about drugs.
The Integrity Plus line has received a total of 54 calls, of which 16 were from people with general Crimestoppers information unrelated to police staff.
The rest included allegations of breaching official conduct or policy, breaching privacy or confidentiality, sexual harassment, conflict of interest, dishonesty, and misuse of police property or the police database.
Just three of the complaints have been upheld and one has resulted in a charge.