Harris believed it was the first time in 20 years of Greenstone TV such a mix-up had occurred.
McCourtie was stunned to hear police contacted Greenstone. He said footage depicted the dogs in a positive context but juxtaposing it with his story was unpalatable to police.
McCourtie said before the broadcast, TVNZ assured him use of Dog Squad material was cleared. Yet he added: "Regardless of who the production company is ... the bottom line is an independent broadcast show, published nationally on a serious matter of police accountability, has been muzzled."
McCourtie said the TV clips mirrored the blacked-out, redacted documents he'd received from police during his quest. Moore and Tank were back on duty before an internal inquiry was completed.
Spokeswoman Megan Richards said TVNZ had no choice but to cut the footage which was provided to Sunday in good faith, but in error.
"The police are not exercising control of content available on TVNZ's website, and the reason for its removal is not to do with any police complaint," Richards said.
In March last year, TVNZ cut footage from Sunday and apologised to the Department of Corrections after the show flew convicted killer David Tamihere over a historic murder scene, in what was feared a breach of his parole conditions. A year later, Tamihere was found not guilty of breaching parole.
A police spokeswoman said guidelines for the use of reality TV footage had not been followed, and Greenstone had apologised.