The Serious Fraud Office was set up on the recommendation of the Roskill Committee by the Criminal Justice Act 1987. It is responsible for the investigation and prosecution of serious and complex fraud. In recent years the Office has been criticised for the way in which it handles cases, largely as a result of the perception that there have been too many acquittals in the cases which it has chosen to prosecute. In this interview, Matthew Weait discusses the role and aims and problems of the Office with its present Director, George Staple. Mr Staple considers the problems which the Office faces, the extent to which he considers criticism justified and wider issues relating to the effective prosecution of fraud.