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MI5 alert over death of Russian supergrass exile

The Sunday Times

MI5 is monitoring the mysterious death of a Russian supergrass after a second post-mortem examination on his body failed to rule out murder.

Alexander Perepilichnyy, a wealthy businessman who sought sanctuary in Britain three years ago after falling out with a crime syndicate and testifying against it, was found dead outside his luxury home on a private estate in Surrey.

Ministers are awaiting the results of further toxicology tests on the body for radioactive poisons including polonium 210. The same poison was used to murder Alexander Litvinenko, the former KGB spy who died in London six years ago.

Perepilichnyy, who was 44 and apparently in good health, was co-operating with the Swiss authorities, who have been investigating allegations of money-laundering and a network of corrupt Russian officials.

The network is said to be led by Dmitry Klyuev, a convicted Russian criminal, who has been named by American and British politicians as the head of the so-called Klyuev crime group.