Trail of Cthulhu: Eternal Lies
Konovalov is a Russian thug, answering to Jonathan Brooks, leader of the Mexico City cult. Konovalov is likely responsible for several crimes around town, including arson and murder. Victor Cortez lives in terror of Konovalov.
When the cult in Mexico City was destroyed, he took Brooks and his wife, Luz, to an area outside of Stalingrad where they attempted to reform the cult. New investigators stumbled across their operation and killed the would-be cult members.