Abstract
New sources are published about white terror in Siberia: materials of the investigation file of the head of the garrison of the city of Tatarsk, I. A. Mikheev and the chief of police of the Tatarsk district N. I. Stepanova. The published documents shed light on the circumstances of the extrajudicial execution of political prisoners by the Kolchak residents in Tatarsk prison on November 19, 1919. Based on the published documents, it was established who ordered the execution of political prisoners during the evacuation of the prison and who enforced this order, as well as the number of victims of extrajudicial execution was specified. In addition, the published documents contain valuable information about the degree of collapse and disorganization of the Kolchak army and state apparatus after the surrender of the capital of white Siberia, the city of Omsk.