An investigation has cleared the chief constable of North Wales Police of allegations made against him by a North Wales Police Authority member.
The inquiry found that Mr Brunstrom had acted properly
Peter Bolton had claimed Richard Brunstrom did not properly investigate the leaking of a confidential report.
The Independent Police Complaints Commission disagreed with the claims.
The commission is still investigating a complaint against a second police officer.
The allegations followed an investigation into the leaking of a police authority report to a news agency.
Mr Bolton was charged with misconduct in public office following the investigation, but was cleared when his trial collapsed at Chester Crown Court last January.
He later claimed that Mr Brunstrom had failed to act with fairness and impartiality by not establishing an independent inquiry by an outside force into the leaked report.
An investigation was carried out by IPCC investigators under the supervision of Tom Davies, commissioner for Wales.
In its ruling, the commission cleared Mr Brunstrom of any wrong-doing.
It also cleared him of allegations over the leaking of details about the police investigation into Mr Bolton.
Although Mr Brunstrom ordered an inquiry into the leaking of the confidential document, the decision was not based on any malice towards any individual or group, it said.
In a statement following the investigation, Mr Davies said: "In my view, the chief constable was entitled to order an inquiry and he was entitled to appoint the investigating officer.
"It did not fall outside direction and control as there is no evidence to suggest that it was based on malice.
"As such it is then totally a matter of the professional judgement of the chief constable who, in making these decisions, has to consider his unique relationship with the elected and appointed members of a police authority whose report had been leaked."
Mr Davies added that it would have been "disproportionate to ask an outside police force to look into this specific matter."
Councillor Ian Roberts, chair of North Wales Police Authority, said: "The matter has been rigorously investigated by the IPCC and they have concluded that Richard Brunstrom was acting properly and within his powers."
"The police authority has co-operated fully with the investigation team at every stage and we welcome the findings of their report."