Madeleine McCann was killed and abused shortly after being kidnapped.Christian Brueckner is suspected of snatching and quickly murdering the youngster while she was on a family holiday in Portugal in 2007, reports The Mirror.Now Hans Christian Wolters, who is leading the investigation, disclosed the information while launching a fresh appeal for tips.It comes as fears grow that Brueckner could be freed from prison before he can be arrested.Despite German prosecutors admitting they think they