Kate and Gerry McCann could launch fresh legal action against Goncalo Amaral after he took part in an upcoming Netflix documentary.
The former Portuguese police chief has given a interview to the filmmakers behind the controversial series, sources claim.
Lawyers are “closely watching” what Amaral will say in the show about Madeleine’s disappearance, which is due to air this month.
Kate and Gerry sued him for defamation after he penned a damning book pointing the finger of blame at them.
He cruelly claimed Madeleine, who vanished from Praia da Luz in 2007, died in an accident and her parents covered it up.
Goncalo Amaralc laimed Madeleine, who vanished from Praia da Luz in 2007, died in an accident
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Amaral, who lives in Lisbon, pocketed more than £350,000 from his book The Truth Of The Lie and a DVD spin-off.
The couple sued in the Portuguese courts, sparking a bitter eight-year legal battle that still rumbles on.
An injunction against the book was issued in 2009 and the McCanns won the libel action six years later.
However the ruling was overturned on appeal and that decision upheld by Portugal’s Supreme Court in 2017.
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The McCanns are now challenging him at the European Court of Human Rights after being told to pay £750,000 compensation.
They fear if they lose, Amaral’s payout will wipe out a fund set up to finance the continuing search for Madeleine.
Amaral, 59, is one of more than 30 interviewees who have taken part in the British-made Netflix documentary.
Because it has been produced in the UK, the McCanns could sue Amaral in this country over any claims he makes.
Madeleine McCann vanished in 2007
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The couple turned down the chance to see a preview of the documentary but their lawyers will watch when it is aired.
A source told the Mirror: “They have no desire to watch the show but they have been made aware Mr Amaral has taken part.
“Obviously what he says will be monitored in light of the previous false allegations he has made.”
It is understood other participants include former newspaper editor Kelvin McKenzie and the McCanns’ ex-spokeswoman Justine McGuinness.
Kate and Gerry refused to take part, as did the friends who were in Portugal with them when Madeleine vanished.
In a statement last week they said the Netflix film could “potentially hinder” the ongoing police investigation.
It has been 12 years since Madeleine was seen
A high-profile search and appeal has failed to find Madeleine
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The show was due to appear on the streaming service last week but its launch was inexplicably delayed.
Netflix refused to comment on rumours the series may have been axed by worried bosses following the McCanns’ comments.
A spokeswoman told the Mirror more details will be announced “later this week”.
Scotland Yard’s ‘Operation Grange’ probe is continuing and detectives recently asked for extra Home Office funding.
Madeleine was three when she was last seen on holiday with her parents in Portugal in May 2007
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Madeleine was days away from her fourth birthday when she vanished from her parents’ holiday apartment in Praia da Luz.
Kate and Gerry, from Rothley, Leics, say they still believe their daughter is alive because there is no evidence she has died.
Amaral was sacked from the original Portuguese probe after criticising British police and making mistakes in the investigation.
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