A top British police officer says the mystery of Maddie McCann will be solved in his lifetime in claims made during a new bombshell Netflix documentary, due to be released this week.
Jim Gamble, the senior child protection officer in UK's first investigation into the youngster's dissapearance, says: 'I absolutely believe that in my lifetime we will find out what has happened to Madeleine McCann', the Sun reported.
'There's huge hope to be had with the advances in technology. Year on year DNA is getting better. Year on year other techniques, including facial recognition, are getting better.
'And as we use that technology to revisit and review that which we captured in the past, there's every likelihood that something we already know will slip into position.'
This is while other experts suggest that the youngster is likely to have been 'kept alive' by traffickers due to her financial value as a 'middle-class British girl'.
Jim Gamble (right) has said that it could be possible that Maddie (left) could be found in his life time due to advances in technology
Maddie's parents (pictured above) had received numerous requests from producers Pulse Films over the past 18 months
Private investigator Julian Peribanez, who was hired by the McCann family suggests that traffickers 'usually go for lower-class kids from third world countries'.
He said: 'That's the main supplier of these gangs.
'The value that Madeleine had was really high because if they took her it's because they were going to get a lot of money.'
The documentary also hears from the former Portuguese police chief, who claimed Madeleine McCann is dead and that her parents faked her kidnap in one of the key interviewees of the new Netflix movie about the missing girl.
The streaming giant is due to trail the show tomorrow morning with the first programme in the series - already predicted to be a huge global hit - going live on Friday.
Kate and Gerry McCann (pictured above) have said they want 'nothing to do with' the new Netflix show
Maddie's parents Kate and Gerry had hit out at Netflix last week saying the documentary could hamper the search for their daughter.
The company was locked in crisis talks and even considered shelving it but has decided 'the show must go on.'
The McCanns, who refused to take part in the project and declined to watch a preview, will be infuriated that their tormentor Goncalo Amaral - 'a thorn in our sides' - is set to be starring in it.
The couple, who are still challenging a libel win by the ex Portuguese detective in the highest court in the land, will be 'horrified to learn' that the worldwide streaming service has interviewed the retired officer. He accused them of covering up their daughter's accidental death in a holiday apartment nearly 12 years ago.
A pal of the McCann's said last night: 'Kate and Gerry will be mortified and horrified to learn that one of the lead roles has gone to Mr Amaral who has caused them so much extra hurt and pain over the years. He has been a thorn in their sides since the very beginning.'
Oscar-winning Netflix has simply named the show 'The Disappearance of Madeleine McCann' and is is boasting it has 'riveting' new interviews with key investigators as the 12th anniversary of the world's most famous missing child cases approaches in May.
Goncalo Amaral (pictured above) has previously stated that Kate and Gerry McCann had faked Madeline's kidnapping
MailOnline first exclusively revealed that Kate and Gerry wanted 'nothing to do with' the drama which has cost up to a reported £20 million.
Heart doctor Gerry, 50, and former GP Kate, 51, from Rothley, Leicestershire, said in a joint statement released by spokesperson Clarence Mitchell a week ago. 'The production company told us that they were making the documentary and asked us to participate. We did not see and still do not see how this programme will help the search for Madeleine and, particularly given there is an active police investigation, could potentially hinder it.
Kate and Gerry McCann are vowing to sue retired police chief Goncalo Amaral
The parents of Madeleine McCann are vowing to sue retired police chief Goncalo Amaral if he happens to libel them during his key role in the movie.
A source close to Kate and Gerry told MailOnline tonight: 'Their lawyers will be watching with interest and are warning 'Beware!'
'Mr Amaral is the one who has continued to make false and malicious accusations against Madeleine's parents which has resulted in a long running libel battle. Whilst he won on a counter appeal Kate and Gerry are challenging the Portuguese Supreme Court judgement.
'Kate and Gerry wanted absolutely nothing to do with the Netflix programme but they now understand Mr Amaral is playing a part in it and they want to ensure he says nothing again to incriminate them.'
The couple are asking their lawyers top London based libel experts Carter Ruck to look into it.
Meanwhile they are awaiting a decision by the European Court of Human Rights to say if they have a case to answer against Mr Amaral and the Portuguese court in their ongoing battle.
An ECHR spokesperson said today: 'The case is currently under consideration and there is no fixed time frame for examining it.'
'Consequently, our views and preferences are not reflected in the programme. We will not be making any further statements or giving interviews regarding this programme.'
They spoke out after the Home Office confirmed it was considering a new request for extra funding from Scotland Yard to continue the hunt for Maddie - giving them hope there is 'still work left to be done.'
couple from Rothley, Leics, added: 'Consequently, our views and preferences are not reflected in the programme. We will not be making any further statements or giving interviews regarding this programme.'
Three-year-old Maddie vanished from a holiday apartment in Portugal's Praia da Luz in May 2007 while her parents were dining with pals in a nearby tapas restaurant. She had been left sleeping alone with her younger twin siblings Sean and Amelie with regular half hourly checks being made on the children. Her parents cling onto a glimmer of hope their eldest child could still be found alive.She would now be aged 15, nearly 16.
The McCanns, their family, official spokesperson, 'Tapas Seven' holiday pals, British police and UK private investigators have also snubbed the venture.
Maddie's parents had received numerous requests from producers Pulse Films over the past 18 months.
A source close to the movie makers, which scooped three awards at last month's Oscars for Roma, which follows the life of a live-in housekeeper of a middle-class family in Mexico City - said: 'Everyone everywhere is fascinated by the Maddie story. We would have welcomed the opportunity of working with the McCanns directly but they informed us they couldn't and wouldn't consider taking part while a police investigation is into their daughter's abduction is ongoing.
'But we have interesting new interviews with people close to the inquiry and we believe we can give justice to this unbelievably tragic story.'
An insider at Pulse Films said: 'Netflix are hoping it will be a massive hit.'
Retired Portuguese detective Goncalo Amaral is among the key interviewees. In his best seller book 'The Truth of the Lie'he accuses Maddie's parents - who were once suspects in their daughter's disappearance - of faking her kidnap after she accidentally died in the holiday flat.
Kate and Gerry sued him in April 2009 for libel and their fight has ended up in the European Court of Human Rights.
Kate in her 2011 heart wrenching best seller book 'Madeleine' writes about Mr Amaral : 'That man has caused us so much upset and anger because of how he has treated my beautiful Madeleine and the search to find her. Here was a person who had been entrusted with finding our little girl and who failed her.'
The search for Maddie - who was just nine days away from her fourth birthday - has became the most high-profile missing person investigation in history. The youngster's face in iconic pictures is recognisable around the world.
Netflix has had a string of successful true crime documentaries including hit documentary Making A Murderer on wrongly jailed American student Amanda Knox for British student Meredith Kercher's murder.
And the streaming service scooped three gongs at the Oscars for Best Director for Roma, Best Cinematography and Foreign Language Film while being nominated for Best Picture.
The Maddie movie will examine the high profile case and interview key figures and investigators. Film makers have made several trips to the family's village to speak to locals and have also interviewed journalists who have been covering the story over the years.
The McCann's have so far failed in their long running court battle to silence Mr Amaral over claims he made against them. They were eleft angry and disappointed after Portugal's top court threw out their libel claim against the ex cop in January 2017. They vowed to contest the judgement, slamming it as 'terrible.'
Kate, now a medical worker, had previously said that Mr Amaral's poisonous words had been 'very upsetting and incomprehensible.' She added: 'It has caused a lot of frustration and anger which is a real negative emotion.'
Victorious Mr Amaral said: 'I'm pleased I have a court ruling which defends the freedom of expression.'
The Policia Judiciaria inspector led the initial bungled hunt for Maddie but was later pulled off the case after criticising British police assisting.
In his once banned book Mr Amaral claims Maddie accidentally died in an accident at the holiday flat or by being given an overdose of sedatives. It is based on statements from Portuguese police files which are open to the public.
Maddie's parents fiercely denied his allegations. In their original 36-page writ they described Mr Amaral as a self obsessed, manipulative money-grabber and accuse him of libel and breaching their and their now 14-year-old twins human rights.
The divorcee, 59, has since blamed Kate and Gerry for wrecking his marriage and his career by taking legal action against him in June 2009.