Concerned Ma'anaiama might still reach for his shotgun, an officer directed his police dog to bite his arm.
While at his High Court trial last year evidence was heard Ma'anaiama had been shot three times, the Independent Police Conduct Authority report released today says he was hit twice.
Canterbury District Commander Superintendent John Price said a debrief was held after the incident, in which staff received further training around wearing ballistic body armour and appropriate reporting when armed.
Price said every day police were in the community and put in "high-pressure situations".
These officers were simply ensuring the safety of the community they serve, he said.
"I remain extremely proud of the police officers' actions as they faced a dynamic and dangerous situation," he said.
It was an "unpredictable incident" and the community could be proud of actions of the attending officers whose sole intent was to ensure safety, he said.
"Any attack on police is an attack on us all and I'm extremely grateful that those attending officer's responded in a justified manner and were not seriously harmed."