Police won't be laying any charges in the Todd Barclay recording scandal following the latest round of investigations.
The former National MP's political career ended in disgrace after it was alleged he'd secretly recorded a staff member during an employment dispute in his Clutha-Southland electorate office.
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National Party leader Bill English told police Mr Barclay had told him of the recordings.
Mr Barclay declined to speak to police during their initial investigation in 2016, and once again declined to speak when the reinvestigation opened in 2017.
Police say there was insufficient evidence to seek search warrants.
National Party leader Bill English sent hundreds of text messages to Glenys Dickson, the woman at the centre of the conflict, in the months leading up to her resignation.
Winston Peters put Mr English in an awkward spot in the lead up to the election campaign, saying Mr English sent Ms Dickson 450 text messages in the year before she resigned - including 22 the day before she left.
That was despite Mr English insisting he knew little about the saga. Mr English's story initially went from claiming he couldn't recall details to saying he had made a police statement.
A portion of the $2 million leader's budget was used to pay out Ms Dickson following the dispute.
Mr Barclay inititially denied the recordings existed but then stepped down after Mr English's police statement was released. In the statement, Mr English says Mr Barclay had told him about the recordings.