An Appropriate Adult - John Bennett talks about the Cromwell Street murders

It was one of the biggest police investigations in British history and the Cromwell Street murders by Fred and Rosemary West is currently being played out on our screens in ITV's drama An Appropriate Adult.

The Express & Star spoke with the leading detective back in 2009 at Birmingham City University's criminal investigation degree launch.

John Bennett was detective superintendent operations when the West investigation began in 1994 and is joint author of the book The Cromwell Street Murders, The Detective's Story.