Media playback is unsupported on your device

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.