National repeatedly refused to answer question in Parliament yesterday about John Key's complaint to police about the so-called teapot tape, saying he had acted in his role as National Party leader, not Prime Minister.
And Labour challenged Mr Key's assertion that the freelance cameraman's actions in taping a cafe conversation between Mr Key and Act's John Banks had been "deemed unlawful", when it was only the opinion of a police officer, not a court.
"No such finding of wrong-doing has been made," Labour's David Parker told Parliament.
Police announced on Monday, while Mr Key was overseas, that they had decided not to prosecute cameraman Bradley Ambrose.
Ambrose left his microphone on a cafe table shared by Mr Key and Epsom Act candidate John Banks during an election campaign publicity stunt and taped the conversation inadvertently after being ordered out by Mr Key's staff.
Mr Key complained to the police and refused to give permission for the tape to be published.