Otago Lakes-Central area commander Inspector Olaf Jensen confirmed one of the complaints was an allegation about the unauthorised use of a police database.
That matter was also the subject of an internal police investigation.
''Police are not in a position to comment further at this time,'' he said.
The man who complained about the use of the police database had also made a second complaint to the authority, stemming from three other incidents he was involved in.
The News reported yesterday the man had complained about the police's handling of alleged assaults against him.
Insp Jensen said that complaint stemmed from three incidents.
In the first incident, the complainant was identified as an ''aggressor'' in the situation, but no charges were laid.
In the second, unrelated, incident, the complainant was tailgated and when both people got out of their vehicles, the complainant allegedly assaulted the other driver, Insp Jensen said.
Charges had been laid in connection to the alleged assault.
The third incident was a follow-on from the second, where both drivers realised they were blocking traffic and moved their vehicles around the corner.
Once around the corner, both drivers engaged in a physical fight, he said.
Both drivers received formal warnings as a result of that incident.
In response to a question from the Otago Daily Times about whether any police disciplinary proceedings were under way as a result of the investigation into all the matters, Insp Jensen said disciplinary action was a matter between the employer and employee, therefore police declined to comment.
