He was the mastermind behind the country's biggest-ever cash robbery. But in a few short years, Lee Murray could be free to walk the streets of Kent once again. That's despite the fact that many of the gang he assembled to carry out the raid at the Securitas Depot in Tonbridge will still be behind bars. Far fetched? Not so says Howard Sounes.He has just written a book about the 52 million pound heist which took place almost four years ago. And he believes the ringleader may end up getting off lightly.