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| They are exhuming the remains of his wife and son to see if they were also killed in suspicious circumstances. It could be Moscow, it could be the Russian Mafia, it could be any secret service. Although I don't think that the CIA or MI6 go in for taking out the families of informants or spies. This seems a very vengeful and callous act. | |
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Which rules out CIA and MI6?

Don't know anything about MI6 but from what one hears, the CIA is not squeamish.