Once you get into the world of intelligence, anything is possible, including the idea that this agent may be lying to divert us from something else.(It doesn't help that British authorities have classified the details of UN weapons expert David Kelly's death for 70 years.) Because of this and so many other unanswered questions about Kelly's death, this is a very interesting development for those of us who believe the evidence for invading Iraq was fabricated:

The mystery over the death of David Kelly took a further twist last night after a former KGB officer said he had evidence that the scientist did not commit suicide.

Boris Karpichkov, who worked as a Russian spy for 15 years before fleeing to Britain, has sent a dossier to Attorney General Dominic Grieve in which he claims to relay information from an ‘MI5 agent’ that Dr Kelly had been ‘exterminated’.

His move comes amid increasing calls from within the Coalition Government for a full, independent investigation into Dr Kelly’s death.

Mr Grieve has indicated that he is ‘concerned’ by the growing scepticism among experts about the official version of events.

Dr Kelly was found dead in woods near his Oxfordshire home in July 2003, after the Government exposed him as the source of a BBC report questioning Tony Blair’s case for war in Iraq.

There was no full coroner’s inquest – instead, Lord Hutton chaired a public inquiry which concluded Dr Kelly died from loss of blood after slashing his left wrist with a blunt garden pruning knife.

A number of doctors have since come forward to say that the incision could not have caused his death.

Mr Karpichkov, who sought political asylum in the UK in 1998 and now has British nationality, says he met the ‘agent’, Peter Everett, on dozens of occasions while carrying out work for Mr Everett’s company Group Global Intelligence Services, which hiredex-MI5 operatives for corporate detective work and infiltration.

In the document sent to Mr Grieve, Mr Karpichkov says that during one of their meetings, two days after Dr Kelly’s body was found, Mr Everett told him that Dr Kelly had been ‘exterminated’ for his ‘reckless behaviour’.

Mr Karpichkov, who says that Mr Everett indicated that he was an ‘active field operative’ for MI5, writes: ‘He told me that it was extremely uncomfortable, inconsistent and unusual for Dr Kelly to slash his arm in the way he did. He would have lost some blood, but it would not have been fatal.

‘He also claimed that it was not a coincidence that Special Branch officers were the ones who first appeared on the scene – they moved Dr Kelly’s body to another location, changed the original position of his corpse and took away incriminating evidence.

‘He added that the scene where Dr Kelly’s body was found was carefully arranged and completely “washed out”, including the destruction of all fingerprints. When I asked who was behind his death, he [Mr Everett] answered indirectly, saying the “competing firm”, which I took to mean MI6.’