Police have been found by the Independent Police Conduct Authority to have unlawfully arrested three out of four young people following an early morning incident in the early hours of February 26 last year.
The authority found that the police officer did not know what he was arresting them for, and was simply carrying out instructions given by another officer.
Police had responded that morning to a report that a few people had smashed a window and gained entry into the McDonald's restaurant in Ormiston, East Auckland.
Four young suspects, who were thought to have been involved in the burglary attempt and fled on a stolen vehicle, were later detained in Manurewa by four police officers.
One police officer put a suspect into a headlock and took him to the ground and twisted his finger in the course of the attempt to restrain him.