Madeleine McCann suspect Christian Brueckner has disturbingly taunted police in a new sickening letter about the toddler’s disappearance as his prison release date looms closer.

In a newly unearthed letter, the German paedophile, 48, boasted that police don’t have evidence to pin allegations against him in relation to the toddler’s case, gloating how the dropping of the probe ‘will hit the world like a bomb’.

In the spine-chilling correspondence from prison in his native Germany, where he is currently behind bars for rape, he wrote: ‘Is there a body? No, no no.’

The abominable letter has been unearthed as German police returned from a desperate three-day search scrubland in Praia da Luz, Portugal, near to the villa where the three-year-old was staying before she vanished in 2007.

But the recent search for fresh forensic evidence linking the sexual predator to the toddler’s disappearance was branded ‘a waste of time’ by the head of the German force.

Rainer Grimm, boss of the BKA, Germany’s equivalent of the FBI, told a friend who wished him luck: ‘Thanks, we need it.’

His apparent lack of confidence in the operation to his pal echoed what many have seen as the ‘last throw of the dice’ for investigators looking to solve the 18-year riddle.

And now, in a newly emerged letter, Brueckner insists there is no evidence against him to tie him to the investigation as his scheduled September release date draws closer.

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German police are adamant convicted rapist and paedophile Christian Brueckner (pictured) did it

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Madeleine McCann (pictured) vanished from the Ocean Club holiday complex in the Algarve resort of Praia da Luz in May 2007

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Officers pack up a tent at the end of the day of searching at one of the base camps close to Praia De Luz, Portugal, where searches are being carried out by officers investigating the disappearance of Madeleine McCann

In a letter seen by The Sun, he claimed the ‘important’ and ‘decisive’ questions about his involvement in Madeleine’s disappearance have been left unanswered.

He questioned if his vehicle was ‘clearly’ spotted on the night of the crime near where toddler vanished, and if his DNA or ‘an injured person’ had been found.

He added: ‘Are there other traces/DNA carriers of the injured party in my possession? Photos?

‘And, not to forget, is there a body/corpse? All no, no no.’

The sex offender continued by stating one did not have to be a ‘realist’ to forsee the accusations he is currently facing as well as the investigation ‘will be dropped’.

Further divulging his knowledge of Germany’s legal system, the paedophile, who has been named as a suspect in the case for five years, pointed out the prosecution would have to prove his guilt, rather than he prove his innocence.

‘Even the slightest doubt leads to an acquittal, if there is a court hearing at all,’ he chillingly wrote

Brueckner also went on to allege the allegations against him have been built on ‘purchased witnesses’, as he noted his international infamy.

It comes after the latest search for clues relating to the disappearance of the three-year-old drew to a close on Thursday.

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Prosecutors insist Madeleine is dead but are yet to disclose evidence supporting this theory

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Police have been searching various abandoned buildings

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A distinctive blue tent hinted at the troubling nature of the search

German police are adamant convicted rapist and paedophile Christian Brueckner took part in the disappearance of the young Brit, though he has consistently denied this.

In three months, he could walk out of jail and that is why detectives are desperately looking for something concrete to link him to her disappearance to go with the circumstantial evidence they have.

It comes after disturbing clues were discovered at the sex offender’s abandoned lair in Germany as the probe into Madeleine’s disappearance intensified in May, with prosecutors sure the youngster is dead.

A bombshell cache of horrifying documents, pictures, children’s swimming costumes and toys was reportedly uncovered at a former box-making factory he bought in 2008, a year after the British girl was last seen.

Among the disturbing finds was a hard drive of images that police are said to have kept secret – but are reportedly thought to uphold investigators’ long-held belief that Madeleine was killed.

Police reportedly later found an insurance document that is said corroborate an informant’s account that he allegedly confessed to her murder in Spain in 2008.

The materials found by police, revealed in a Sun investigation broadcast on Channel 4, shed new light on Brueckner’s disturbing obsession with children and his potential involvement in the case.

The storage devices are alleged to have contained thousands of files, including images of child abuse, stories detailing fantasies of abducting young girls, and records of Skype chats with other paedophiles.

Currently, Brueckner nears the end of a seven-year sentence for raping an elderly American woman in Praia da Luz in 2005 police need to move fast.

His earliest possible release date is September 17 however that is unlikely as he will have to pay 1500 Euro in outstanding fines from a series of motor offences to do so.

He has already admitted he will ‘probably leave the country’ which means police will have a nightmare to bring him back if charged.

Last October he was cleared of a series of unrelated sex attacks that took place in the Algarve between 2000 and 2017.

Two years ago police also searched a dam close by for evidence but after a week-long operation nothing was found.

Brueckner continues to deny any involvement with Madeleine’s disappearance.