Two men, aged 36 and 37 were arrested and face a number of burglary, firearm and drug related charges. A 17-year-old female also faces burglary and firearm charges. They are due to appear in the Whangārei District Court on February 18.
A 38-year-old woman is due to appear in the Whangārei District Court on February 11, also facing multiple charges including theft.
One of the men, Christopher Ngarino, had been living with Brown at the rented house in The Braigh for 18 months. She had described him as a friend she had been helping through health issues.
In an email sent to the school community, Brown claimed she was unaware criminal activities had been taking place at her home, and she had since severed her connections with the arrested man.
Police said that as the matter is now before the courts, they are unable to comment further on the case.
Catherine Munro, Waipū school board of trustees chair, said last week said the board accepted that school property and personnel were not involved in the alleged crimes, and the principal was not under suspicion.
The board was working closely with the Ministry of Education and New Zealand School Trustees Association to ensure that it handled the matter correctly, she said.