MADELEINE McCann suspect Christian B has said inmates are threatening to kill him in a moaning letter published by the German press.

       The suspect is in jail in Germany for the rape of a 72-year-old American tourist.

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       Christian B is said to be fearing for his life in prison Credit: Rex 2

       Madeleine McCann went missing in 2007 Credit: ITV

       Christian B has also complained about having to buy his own pens and a lack of coffee creamer.

       The 44-year-old - who has not been charged with Madeleine's 2007 disappearance but was identified as a suspect - made the complaints in a 14-page letter.

       The message, published by Bild, details how Christian B's inmates now know who he is thanks to a documentary linking him to Madeleine's disappearance.

       He claims he gets bullied and receives death threats.

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       In one instance, the letter is said to state, a man walked up to Christian B in a yard and threatened to murder him.

       "I am forcing myself to isolate myself because there is a high probability of a physical attack by fellow prisoners," he said.

       "It's torture."

       Christian B claims to only leave his cell for one hour a day out of fear of being killed and avoids certain areas of the prison.

       He also moaned about prison guards confiscating his pens and complained about a lack of coffee creamer.

       It comes as Scotland Yard's 11-year probe into Madeleine's disappearance will come to an end later this year.

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       A source told The Sun there were "currently no plans" to take Operation Grange any further.

       The decision means that prime suspect Christian B is highly unlikely to be charged over her disappearance.

       It underlines how top cops feel there is insufficient evidence to bring a case against the convicted paedophile and rapist, who German cops were convinced was involved.

       The source added: “The end of the road for Operation Grange is now in sight.

       “The team’s work is expected to be completed by autumn.”

       The source said that the case file could be re-opened if any significant new information comes to light.

       The Grange investigation was launched in May 2011 — four years after Madeleine vanished — after her mother Kate wrote an open letter in The Sun to then PM David Cameron asking for British police to begin an inquiry.

       Current funding of the probe runs out on March 31. A final request by the Met for another grant, taking it to the end of September, was recently submitted to the Home Office.

       It takes the total cost of the investigation to approximately ￡13million.