A friend of the key suspect in the Madeleine McCann case has said he will never cooperate with the police. Ralph H, a former close friend of chief suspect Christian Brueckner, is being investigated as detectives think he could have vital information about her vanishing. Convicted paedophile Brueckner is on trial in Germany for an alleged series of unrelated sexual offences against five women and young girls. He has constantly denied involvement in the disappearance of the toddler in 2006, despite a friend of him testifying in court that he was “100 per cent certain” that Brueckner was the culp…