The man suspected of abducting Madeleine McCann won’t face any charges in the foreseeable future, a prosecutor has told Sky News.

German drifter Christian B, who cannot be fully identified under his country’s privacy law, is expected to be freed from an unrelated jail sentence this year while police in three countries continue to search for evidence against him.

Prosecutor Hans Christian Wolters said: “There is currently no prospect of an indictment in the Maddie case.

“As things stand, the accused Christian B’s imprisonment will end in early September.”

Madeleine, aged three, was asleep with her younger twin siblings in the family’s Portuguese rented holiday apartment before mother Kate discovered her missing at around 10pm on 3 May, 2007.

Her parents were dining nearby on the complex with friends and taking turns to check on all their sleeping children every half an hour.

Madeleine’s disappearance has become the world’s most mysterious missing child case.

Philipp Marquort, one of Christian B’s defence lawyers, welcomed the prosecutor’s pessimism about bringing charges.

He said: “This confirms the suspicions that we have repeatedly expressed, namely that there is no reliable evidence against our client.

“We regret that we have not yet been granted access to the investigation files. We have not yet been able to effectively counter the public prejudice arising from statements made by the prosecutor’s office.”

Christian B, 47, is in jail and coming to the end of his sentence for the rape of an elderly American woman in Praia da Luz, the Portuguese resort where Madeleine disappeared.

In October, he was acquitted on a series of rape and indecent assault charges after a non-jury trial in Germany, in which several references were made to his status as the main suspect in the Madeleine case.

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The prosecutor said he was awaiting the court’s written judgment before launching an appeal against the acquittal. He believes the trial judges were biased against the prosecution.

If successful, he could apply for a new arrest warrant for Christian B to keep him in custody until a retrial with new judges.

He said: “We hope that the Federal Court of Justice will decide before the end of the accused’s imprisonment. If the Federal Court follows our legal opinion, we could apply for a new arrest warrant for the accused’s offences, so that the accused would then remain in custody beyond September 2025.

Mr Marquort said the defence team would oppose the prosecution’s appeal against the acquittal.

Prosecutor Mr Wolters has said in the past that he believes Madeleine is dead and that Christian B was responsible for her death. The suspect denies any involvement.

The case against Christian B is purely circumstantial; he’s alleged to have confessed to a friend that he abducted Madeleine, he has convictions for sex crimes against children, he was living in the area at the time, his mobile phone was close by when the young girl vanished and he re-registered one of his vehicles the next day.

The prosecutor won’t say what evidence he has to convince him Madeleine is dead, but he admitted he is still trying to find forensic evidence to link Christian B to the girl.

Jim Gamble, former head of the UK Child Exploitation and Online Protection centre, said he had expected the prosecutor to charge Christian B soon.

“He’s implied the whole way through that he has something more than the public are aware of,” he said.

“He’s made fairly definitive statements about whether Madeleine is alive or dead so you would expect their strategy to have been to charge him sooner rather than later.

“From what he’s said today I wonder if we’re witnessing the re-positioning of something to manage the disappointment that’ll come.”

Mr Wolters, who is based in Braunschweig, Lower Saxony, is investigating the case with the help of Portuguese police and detectives from Scotland Yard.