Bellfield is currently serving life for killing Millie Dowler in Walton-on-Thames in 2002 along with Marsha McDonnell in Hampton in 2003 and Amelie Delagrange in Twickenham in 2004
Michael Stone's been convicted twice of murdering the Russell’s but has always said he's innocent.
Crime correspondent Martin Brunt has been speaking to Stone's solicitor, Paul Bacon