Figures released to the Northern Advocate, under the Official Information Act, have also showed complaints to the Independent Police Complaints Authority about Northland officers was the highest in 2004 when there were 152, with 39 complaints upheld. Last year, there were 65 complaints to the IPCA about Northland officers, with none upheld, and so far this year there have been seven.
Northland District Commander Superintendent Russell Le Prou said it was a good sign that complaints against police in the region had continued to drop.
"The thing that gives me the greatest comfort is that there has been a drop from 152 complaints in 2004 to just seven so far this year," Mr Le Prou said.
Since 2004, Northland police had introduced a Code of Conduct and training in the areas of ethics and service excellence. Complaints were now dealt with by inspectors, senior sergeants or sergeants, depending on the nature of the complaint.
"All this has led to a drop in the complaints we have received, as the staff are now fully aware of the standards they must reach and that every contact with a member of the public counts," he said.
Trust and confidence in Northland police was reasonably stable.
"In the case against Michael Blowers, any negative publicity would have been balanced by the fact that police took the matter seriously and Blowers was arrested, prosecuted and then sentenced for his crimes."
Nationally, in the past year, 30 police officers have been convicted or accused of serious charges.
Labour police spokesman and Te Tai Tokerau MP Kelvin Davis said police should be more open about allegations faced by their staff. He said while people deserved the right to privacy, the police needed to be more transparent.