German prosecutors said Wednesday they have “concrete evidence” that missing British girl Madeleine McCann is dead, in a major development for a case that has gripped Britain for more than a decade. Authorities in Germany made the stunning revelation in early June that they were investigating a 43-year-old suspect over her disappearance, saying they believe he killed her. “It is concrete evidence, facts that we have, not mere indications,” Brunswick prosecutor Hans Christian Wolters told AFP, adding that he was unable to disclose exact information.