The prime suspect in the disappearance of sent a letter to police saying "decisive questions can never be answered", according to reports.

, who is in prison for raping a 72-year-old woman in in 2005, reportedly sent a letter to officers saying questions which would implicate him in the case of the three-year-old British girl, who vanished from the same resort 18 years ago, cannot be answered.

German and Portuguese police came together this week to search every properties and pieces of land linked to Brueckner, as his sentence is due to end in September. Investigators are said to be set on the idea that the paedophile took the three-year-old but and are desperate to prove this before he is freed - the predator has denied any involvement.

READ MORE:

In the note, seen and translated by Brueckner reportedly wrote: "It is the important questions, the decisive questions that can never be answered. Was I or my vehicle clearly seen near the crime scene on the night of the crime?

"Is there DNA evidence of me at the crime scene? Are there DNA traces of the injured party in my vehicle? Are there other traces/DNA carriers of the injured party in my possession? Photos? And, don't forget, is there a body/corpse? All no, no no."

The vile note also questioned whether his DNA has ever been found at the scene and whether traces of the toddler were ever discovered in his vehicle. He wrote: "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." He added that the accusations against him "will not hold up and that the investigation will be dropped".

The letter carried on with Brueckner claiming that the case was built on "purchased witnesses" but said he understood the German legal system well and claimed it would be unlikely for him to be locked up for her disappearance.

Brueckner wrote: "Now, my path is paved with misjudgements, so to speak, but from now on the whole is watching. Not even the Braunschweig regional court will now dare to make an obvious misjudgement.

It is not clear when the letter was written.

This comes just a day after the latest search was called off by investigators after the appeared to have no luck in finding evidence or clues. The operation kicked off on Tuesday, June 3, with teams scouring through more than 20 plots of land east of Praia da Luz - including a cottage Brueckner was believed to be living in around the time Madeleine vanished.

Brueckner is due to be released from jail in September if no further charges are brought. In October last year, he was cleared by a German court of unrelated sexual offences, alleged to have taken place in Portugal between 2000 and 2017.

Follow our live blog for updates by