Prosecutors have denied that the case against Christian B is set to collapse after British investigators found out he had an alibi.
Madeleine disappeared “30 minutes away” from a resort in Prague de Luz, Portugal, led by ex-detectives who discovered the 44-year-old sexual predator.
Details of its investigation will be aired this spring on Channel 5 documentary Madeleine McCann: Investigating the Prime Suspect.
It is set to demolish the case against Christian B in a German prison, where authorities say he killed her.
It is said that phone records show him near the night scene in 2007 when she was three.
But a new investigation led by former Surrey police detective Mark Williams-Thomas is said to show alibi for B “stacks up”.
But German authorities have dismissed the claims.
Prosecutor Hans Christian Wolters told the Daily Mirror: “If I have Alibi and I have been accused of this, I will say it. But I have not heard any such statements [Christian B] Or their lawyers.
The TV team, which has spent months in Portugal and Germany, has found new evidence in both countries to cast doubt on its guilt.
A source said: “They concluded that B Madeleine could not be snatched. He was 30 minutes away and was not on the phone at Priya de Luz the night she disappeared.
A friend of a pedophile who was convicted last year has given him a potential alibi.
But she later told a German newspaper that she could not remember if she was him the night Madeleine disappeared.
German prosecutors are hoping to sue Christian B, 45, in 2004 for allegedly raping a 20-year-old Irish waitress in Algarve, Portugal.
He is already in prison in 2005 for the horrific rape of a pensioner in Praya de Luz.
But he denied involvement in Madeleine’s disappearance and refused to speak with investigators.