The German paedophile suspected of abducting Madeleine McCann is said to have been placed under surveillance in jail in the hope that he will confess to the notorious crime to a fellow prisoner.
Police believe that Christian Brückner might inadvertently blurt out enough details about his involvement in her disappearance to allow them to charge him with her kidnapping and murder.
Brückner, 43, is behind bars in Kiel in northern Germany for a drugs offence, but his history of rape and child sex abuse has made him the prime suspect for Madeleine’s disappearance from the Algarve 13 years ago.
Although there is significant circumstantial evidence linking him to the crime, police are lacking a “knockout blow”, according to an informed source.