https://www.inopressa.ru/article/20Dec2018/nytimes/coroner.html
http://www.kasparov.ru/material.php?id=5C1B4272063B2
https://www.kommersant.ru/doc/3835904
Despite earlier indications of poisoning, a British coroner ruled that a key witness in the Magnitsky fraud case in fact had died of natural causes.
https://www.nytimes.com/2018/12/19/world/europe/russian-whistle-blower-magnitsky.html
https://www.gazeta.ru/army/2018/12/19/12100951.shtml
https://www.gazeta.ru/army/2018/12/19/12100765.shtml
https://www.kommersant.ru/doc/3835626
https://www.gazeta.ru/comments/column/mironova/12099637.shtml
http://www.kasparov.ru/material.php?id=5C18E3D9F17A7
https://www.gazeta.ru/politics/2018/12/18_a_12099151.shtml?updated