Over 100 police officers investigated after 30,000 breath tests falsified

More than 100 police officers are under investigation after 30,000 alcohol breath tests were “falsely or erroneously recorded”, RNZ can reveal.

“From the audit which covered over 4.6 million breath tests performed between 1 July 2024 and 17 August 2025, the initial analysis suggested there were tests conducted that were simulated without the involvement of a driver.

The audit indicated that some staff had recorded breath screening tests that hadn’t occurred.

Johnson said that despite this, Police’s obligation to deliver 3.3 million tests for NZTA and Ministry of Transport had been met and was not compromised.