Sergei Lvovich Sedov (Russian: Сергей Львович Седов; 21 March 1908 – 29 October 1937) was a Soviet engineer and scientist.
[6][3] Despite having taken his mother's surname to avoid political affiliation with his father,[6] Sedov was arrested on 3 March 1935[3] "on trumped-up charges [and] refused to betray [Trotsky]".
Hoover Digest reported that some records show he was killed in a prison uprising, while others allege he was shot in Krasnoyarsk after being accused of a poisoning plot.
[1] In 1988, The New York Times asserted that Sedov was returned to Moscow and shot for Trotsky allegedly plotting to kill Joseph Stalin.
[4] Memorial's database of victims of political terror in the USSR (Russian: Жертвы политического террора в СССР) shows that he was sentenced to death by the Military Collegium of the Supreme Court of the Soviet Union on 29 October 1937, executed the same day, and buried in Krasnoyarsk.