The teapot tape investigation was based on a complaint by Mr Key. He claimed a conversation he had during a publicity stunt with Act leader John Banks in the 2011 election campaign had been deliberately recorded by cameraman Bradley Ambrose. Mr Ambrose denied the allegation and charges were never laid.
The New Zealand First leader said in Parliament yesterday he had seen briefing notes from the Wellington police to the Auckland police. He claimed the notes showed the police wanted to seize his phone records and lay charges against Mr Ambrose.
He said the notes stated that Mr Key's chief of staff, Wayne Eagleson, should be "kept in the loop". If Mr Eagleson was being kept in the loop, Mr Peters said, "it stands to reason that his boss John Key would also have been in the loop as well".
Mr Peters said it was the worst abuse of power he had seen in his years in the House.
"This is corruption that goes to the core of this country's activities."
Mr Key said Mr Peters was talking "nonsense".