Cops make urgent plea in Maddie McCann case amid chilling doco

German police have made an appeal to their British counterparts over the prime suspect in the Madeleine McCann case after a new documentary revealed shocking new details.

German investigators want British police to reopen their live investigation into the disappearance of Madeleine McCann before the prime suspect is released from jail in the coming months.

German police believe that help from London Metropolitan Police’s Operation Grange team could be important ahead of Christian Brueckner’s release from jail later this year.

Currently, the British team staffs hotlines and monitors new tip-offs on Madeleine who disappeared during a family holiday to Portugal in 2007. She was days away from turning four.

Christian Brueckner is the prime suspect in the disappearance of British toddler, Madeleine McCann, in 2007. Picture: AFP

But German police want British police to play a bigger role to help secure a successful prosecution.

“There is huge interest in Germany in the British stepping up their investigation again,” a source told The Sun.

“The clock is against the case here and investigators do not want to see Brueckner walk free.

“Their best option could be intervention from UK cops – but they have to be prepared to take it on.

Madeleine McCann disappeared while on a family holiday in Praia da Luz, Portugal in 2007. Picture: AFP

Madeleine McCann went missing just days before her fourth birthday. Picture: AFP

“There are 20,000 pages of Madeleine evidence and the Germans are ready to translate the lot.”

A haul of disturbing material included child-abduction stories written by Brueckner, plus chilling Skype chats with other pedophiles.

Kids’ swimming costumes and toys were also found, along with guns, ammo and chemicals.

There were also disturbing photos of Brueckner, including nude, at the Arade Dam, a key search location for Madeleine.

Madeleine’s parents Gerry and Kate were made aware of the findings before they were made public.

Operation Grange was granted A$223,000 in public funding last month to keep it running for another year.

It continues to treat Madeleine as a missing person.

Police searched an allotment that belonged to Christian Brueckner. Picture: Getty Images

Convicted pedophile Brueckner is scheduled to be released on September 17 – less than five months away — from his current prison sentence for sexual assault.

Fears have been growing among prosecutors that an appeal which would keep Brueckner imprisoned will not be granted in time.

Their back-up plan has been to charge Brueckner over the disappearance of Madeleine, then three, from Portugal’s Praia da Luz in May 2007.

But they fear a lack of forensic evidence may be frowned on by the same courts that cleared him of child abuse and rape claims last year.

It comes as bombshell evidence found at a rundown factory used by Madeleine McCann suspect Christian Brueckner has been revealed for the first time in a new documentary, which has just aired in Britain.

The documentary, Madeleine McCann: The Unseen Evidence, has laid bare the shocking haul found in a German police search with disturbing evidence, which shows Brueckner’s obsession with children.

The hotel in Portugal where then three-year-old British girl Madeleine McCann disappeared in 2007 while on holidays with her family. Picture: AFP

However German investigators say they have “physical” proof she is dead.

Last October, lead prosecutor Hans Christian Wolters stated they believe Brueckner kidnapped and murdered her.

According to The Sun, this position remains the same.

“As a starting point the Brits would need to apply in writing for evidence,” a source in Germany told The Sun.

“There is a legal procedure to follow.”

British police said Operation Grange was open to any evidence that can be provided.

“We continue to support Madeleine’s family to understand what happened on the evening of 3 May, 2007 in Praia da Luz,” a spokesman added.

“This includes working with our colleagues in Germany and Portugal. Our thoughts remain with the family.”