Britain's top criminologist Professor David Wilson has studied the abduction of three year old Madeline McCann for more than a decade and now, 18 years later since her vanishing from her bed by the Portugese seaside, he says it's time to end the police search.

The Met police still have a team of three working away funded by the taxpayer whilst the most likely suspect, Christian Bruckner could be released from jail later this year for an unrelated crime only to disappear for ever.

Professor Wilson believes Christian B is the killer and new evidence unearthed by the Sun this month only strengthens that belief. This is a cracking discussion with Martin Frizell who first alerted the world to Madeline's disappearance and the Prof who says he knows what happened to her - the only mystery is whoddunnit? And he knows that too!

Chemical castration is being rolled out in the UK for sex offenders and rapists but will it stop these sick men from reoffending again? And violent domestic abusers, muggers and thugs may well be released early from jail to free up spaces in Britains overcrowded prisons. Reporter and broadcaster Martin Frizell and emeritus Professor of Criminology David Wilson have opposing views on dealing with the men who ruin lives, especially young children.

Imagine losing almost forty years of your life? The chance to. have children, a career, homes, holidays - four decades worth that never existed. Peter Sullivan was freed from jail this week after serving 38 years for a crime he didn't commit. He maintained his innocence throughout despite being convicted of the murder of 21 year old Diane Sindall in 1987. All down to modern DNA that proved it wasn't him but his cries for help, for a review were turned down time and again. Martin Frizell and emeritus Professor of Criminology David Wilson try to make sense of Britain's longest miscarriage of justice.