Alexander Kolchak
Shchetinkin served in 1920 as a member of the Extraordinary Revolutionary Tribunal that interrogated and ordered the execution of White Russian Commander Alexander Kolchak and Prime Minister Viktor Pepelyayev in Irkutsk. Later that year he became deputy chairman of the Achinsk district executive committee and a member of the district party committee while also serving in a detachment of partisans and volunteers that fought against General Pyotr Nikolayevich Wrangel.