Respected Portuguese media outlet Expresso has reported the search operation is taking place following a tip from a 'very credible' German police informer, it was claimed today. The informant gave detectives 'details' they took 'very seriously,' it said. Who is Christian Brueckner? The prime Madeleine Mccann suspect The disappearance of Madeleine McCann from the popular holiday resort in Portugal's Algarve has confounded detectives for more than 16 years. No one has ever been charged in connection with the disappearance of Maddie, who would now be almost 20. However, German prosecutors believe they have an answer to the 16-year-old mystery: convicted...