Bungling German cops tipped Christian Brueckner about being a suspect in the Madeleine McCann case seven years ago.They sent the pervert a letter asking him to visit their HQ so he could be interviewed in relation to the case.And police sources said this “heads up” gave him the chance to dispose of any potential evidence linking him to Maddie – such as a video or a “trophy”.Brueckner had videoed himself raping a widow of 72 in Praia da Luz two years before Madeleine, inset, vanished there aged three in 2007.A criminology experts said alerting him was a “serious mistake”, adding: “It is common to first gather info in the area and not to attack a suspect head-on.”Brueckner got the letter, headed “Subpoena as a witness”, on November 4, 2013..
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