Madeleine's disappearance from her family's vacation apartment, while her parents were out having dinner nearby, was manna to Britain's aggressive and often ruthless tabloid press, which sent reporters to hound the McCanns and track the investigation.
Three-year-old British toddler Madeleine McCann went missing from the Portuguese resort of Praia da Luz while on vacation with her parents in 2007.
He said: "They usually go for lower-class kids from third world countries".
He said: "That's the main supplier of these gangs".
One expert claims that she might still be alive due to her "value" as a white middle class girl.
This documentary has been so highly anticipated and there has been a lot of controversy surrounding it.
The documentary also features contributions from former police chief Goncalo Amaral, who has previously claimed Maddie is dead and accused the McCann's of faking the kidnap of their daughter.
They are now embroiled in a bitter, long running legal battle with him over his bombshell accusations.
It sets up the documentary as a must watch for anyone who's followed the investigation.
People across the United Kingdom grieved the disappearance of the small girl after she vanished in May 2007.
Senior child protection officer Jim Camble, who features in "The Disappearance of Madeleine McCann", believes the truth about what happened will come out in his lifetime.
"There's huge hope to be had with the advances in technology".
"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".
"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, it could potentially hinder it".
"Consequently, our views and preferences are not reflected in the program". "We will not be making any further statements or giving interviews regarding this programme".