Secret. To His Excellency Vigel. Count Kirill Razumovsky, traveling from Moscow to his estates, caused disturbances at all stations: he beat people, wounded one with a dagger, shot at another, and took horses without payment. I order his arrest and transfer to the Shlisselburg Fortress. Minister of Internal Affairs, Count Kochubey. August 21, 1806.

Rumors reached the emperor that Kirill Alexeyevich had joined the Illuminati in Germany and kept secret documents at home. Therefore, he does not sleep at night, surrounding himself with a loaded pistol and other weapons. A team of 10 people was formed for his arrest. When they entered his estate, the count met them with a dagger at his waist. He did not resist arrest but demanded to meet with his father, which was denied.

A few days later, Razumovsky was taken to the Shlisselburg Fortress. In Mikhail Gernet's book "History of the Tsarist Prison," there is mention of Count Razumovsky being held in a secret house. This place usually housed important state, religious, and criminal offenders. The report describes how he was accommodated in prison: "His room is clean. During Holy Week, he requested fasting food and ate fresh sturgeon, boiled prunes, white honey with rolls. Wine is issued by prescription." In his cell, he had a bear fur coat, 4 robes, 7 slippers, and 3 frock coats.

The count spent a whole year in solitary confinement, after which he was transferred to the Peter and Paul Fortress, and in May 1808, sent to the Spaso-Evfimiev Monastery in Suzdal. Although the monastery housed only the mentally ill, the aristocrat was placed there for "indecent behavior, drunkenness, and free thoughts about religion and morality." Ultimately, Razumovsky was declared a "semi-idiot" and placed under the supervision of the Vladimir governor.