11 cases where Russia has assassinated critics, whistleblowers and key witnesses:

[DetlefK]

http://www.democraticunderground.com/12512418089
https://www.bostonglobe.com/news/world/2016/08/20/more-kremlin-critics-are-ending-dead/AB7NJLUiJ06FhnMu9iVyZK/story.html

during Putin's government:
- Vladimir Kara-Murza, lawmaker who campaigned against Russia's interests, May 2015, somehow ingested a near-lethal dose of heavy metals
- Alexander V. Litvinenko, 2006, somehow ingested the radioactive substance Polonium-210 and died
- In the case over state-sponsored doping, two other officials with knowledge of the scheme died unexpectedly as the outlines of the scandal began to emerge.
- Mikhail Y. Lesin, fromer Kremlin-insider, 2015, died of blunt-force-trauma inside his hotel-room in Washington DC
- Alexander Poteyev, former russian spy, July 2016
- Sergei L. Magnitsky, auditor who discovered MASSIVE corruption in Russia, died in a russian prison in 2009 from lack of medical care
- Valery Kurochkin, key witness to this corruption-case, liver-failure at age of 43
- Oktai Gasanov, key witness to this corruption-case, heart-failure at age of 53
- Alexander Perepilichny, key witness to this corruption-case, somehow ingested "Gelsemium", a poisonous plant from the Himalaya used in chinese assassinations
- Karinna Moskalenko, human-rights-lawyer, 2008, died from Mercury-poisoning after it somehow showed up in her car
- Viktor Yushchenko, pro-western President of Ukraine, 2004, almost died and was left disfigured from a failed Dioxin-poisoning
- Anna Politkovskaya, anti-government journalist, 2004, drank poisoned tea on the russian airline Aeroflot but survived, 2006, was shot by hitmen in her elevator



“How can you protect yourself?” Kara-Murza’s wife asked. “What can you do? Not eat? Bring your own lunch everywhere? How can you predict a poisoning?”

Some do take precautions. Garry Kasparov, the former chess champion and now an opposition figure, has long had bodyguards carry bottled water and prepared meals for him.