Pathologist calls for spy death case to be re-examined
24 May 2012 Last updated at 15:48 BST
A leading pathologist who carried out one of the post mortems on the MI6 officer Gareth Williams has told the BBC the possibility that he died alone should be re-examined.
Dr Richard Shepherd has told Radio 4's The Report that the police should take seriously new claims that it is possible to lock the bag in which the 31-year-old was found from the inside.
Phil Kemp reports.