A Russian whistleblower who had uncovered claims of large-scale corruption had traces of a poisonous plant in his stomach lining, an inquest has heard.
Alexander Perepilichnyy, 44, had been out jogging near his £3m Surrey mansion where he collapsed and died.
He had been assisting Swiss authorities expose an alleged £140m Russian money-laundering operation before he died. He was publicly named as the source that led to the Swiss criminal proceedings.
A court at the Old Bailey heard that Perepilichnyy had received threatening phone calls from an organised crime group and had taken out "multiple" life insurance policies before his death.
Bob Moxon Browne, QC, for Legal and General said: "The contents of Mr Perepilichnyy's stomach were flushed away very shortly after his death. There is no bag of stomach contents. There is a quantity of material that was subsequently retrieved from the stomach cavity."