For 20 years, Paul Ferris was at the centre of crime in Scotland's most violent city. He knows street life intimately and is the co-author and subject of the hugely successful The Ferris Conspiracy. Reg McKay worked the same streets on the other side of the fence - as social worker. He is now an investigative journalist and the author of None So Pretty: The Sexing of Rebecca Pine and Indictment with T C Campbell.