Police Minister Anne Tolley says police staff should not be drug-tested in the workplace.
Her comment came after a police prosecutor on Thursday admitted charges of using and possessing methamphetamine, and using cannabis.
Brent Thomson posted videos of himself using methamphetamine, and blogs describing his use of drugs at sex parties in April and May, online.
Police found a small amount of the drug "P" and syringes when they searched the 49-year-old's home. He is seeking a discharge without conviction in the Waitakere District Court.
Thomson, who worked mainly in the Family Violence Court and the Auckland District Court, is also subject to an employment investigation.
Anne Tolley says the overwhelming majority of police staff are doing a fantastic job and they should not face workplace drug testing. She says police are quick to prosecute their own if there is any wrongdoing.
The Police Association agrees that staff shouldn't be given workplace drug tests. President Greg O'Connor says the public should be re-assured by the systems that police already have.