A witness in the ongoing high-profile trial of Christian B in German court has described discovering graphic and incriminating videos after stealing from the defendant’s home. B, a 47-year-old German national, is the prime suspect in the 2007 disappearance of 3-year-old British girl Madeleine McCann in Portugal. He is currently on trial in the central German city of Braunschweig for unrelated serious sex crimes. The man has never been charged in McCann’s disappearance, although investigators remain convinced that he is the most likely culprit. The 53-year-old witness on Wednesday told the cour…