Professor David Wilson is the country’s leading criminologist and an expert on murder and serial murder. His books and television series, including Banged Up and Serial Killers, give benchmark insights into the minds of those who present the greatest danger to society. Chances are when there is a particularly heinous murder somewhere in the country that is baffling the police it will be Professor Wilson who is asked to offer help and advice. Think Cracker,  think offender profiling; think the real CSI.