“Assassination of Boris Nemtsov”
https://en.wikipedia.org/wiki/Assassination_of_Boris_Nemtsov
“The late journalist Anna Politkovskaya was murdered in the lift of her apartment block in 2006. In this extract from Putin’s Russia, she delves into Russian society to find tales of corruption leaking down from the Kremlin, and her country’s return to totalitarianism”
Last point:
“Unlike in Litvinenko Case, Putin Wanted Moscow’s Involvement in Skripal Attack to Come Out, Milshetyn Says”
“The murder of Litvinenko, the author of The FSB Blows Up Russia, was like the bombings of the apartment houses in 1999: everything pointed in one direction, but it was circumstantial rather than definitive; and thus his death became as it were “part of the psychological war of Russia and the West and its own compatriots.”
http://windowoneurasia2.blogspot.com/2018/03/unlike-in-litvinenko-case-putin-wanted.html