Police have upheld two complaints about officers' conduct made by a protester at the Waihopai spy base in Marlborough.
An internal investigation found officers breached police policy by omitting to remove tasers when they went to the protests in January and at least one acted unprofessionally.
One of the protesters, John Minto, complained about police behaviour when officers told the group to leave the base but refused to accept a letter they had come to deliver to the base commander.
Mr Minto says an officer screwed up the letter and threw it over his shoulder.
"There was a woman pushed over and several people manhandled and these were older people, people in their seventies and maybe even one person in their eighties, and we thought the police behaviour was completely inappropriate," he says.
Mr Minto says the behaviour was provocative and unnecessary.
In a letter to Mr Minto, Marlborough area police commander Simon Feltham says the actions of at least one officer fell short of the police's professional standards, although he says there are differing versions of what happened to the letter.
Mr Minto says he's pleased at the outcome of his complaint.
Mr Feltham says policing of the spy base has been reviewed as a result and increased dialogue with protesters led to a demonstration in July passing without incident.
He says staff have been reminded of taser policies.
