Christian Brueckner, the suspect in the disappearance of Madeleine McCann, boasted to a friend about a four-day sexual assault of a girl as young as 14, a court has been told. Michael Tatschl, 50, was giving evidence at Brueckner’s trial – unrelated to Maddie, but which sees him accused of five counts of sexual assault in Portugal between 2000 and 2017 – in the German city of Braunschweig. He told the court that the “14 or 15”-year-old girl had come from a local rehabilitation programme and had “run away” when she encountered Brueckner. Tatschl said the Maddie suspect had installed a “chest he…