A senior Dunedin police officer slammed by a judge over his "casual approach" has been told by the police watchdog his conduct did not meet good practice.
However, Detective Senior Sergeant Kallum Croudis was cleared by the Independent Police Conduct Authority of a conflict of interest while working on a case in which a man died after taking morphine in April 2016.
It was later found the cause of death was a pre-existing medical condition but police investigated the two people who he had been with at the time he died.
Judge Michael Crosbie, in a hearing at the Dunedin District Court in May, made scathing remarks in reference to Det Snr Sgt Croudis' involvement in the investigation.
The judge described the police investigation as ''haphazard'' and noted the veteran officer was a friend of the dead man's father.