These investigative documents from July and August 2002 detail the interrogation and psychiatric evaluation of Adam Osmanovich Dekkushev regarding his role in the 1999 apartment bombings. Dekkushev, found sane by the Serbsky Center, confesses to manufacturing explosives using a concrete mixer to combine aluminum powder, ammonium nitrate, and sugar under instructions from Arab commanders Khattab and Abu Umar. He identifies key accomplices such as Yusuf Krymshamkhalov, Timur Batchayev, and Achimez Gochiyayev, detailing the logistics of transporting approximately 12 tons of explosives to Moscow for the Guryanova St and Kashirskoye Hwy attacks, and 5 tons to Volgodonsk. The testimony emphasizes the group's motivation was to stop the war in Dagestan and includes claims of bribing a traffic police (GIBDD) officer with sugar to facilitate the movement of explosive materials. The file documents the specific manufacture of clandestine explosives rather than the hexogen/RDX materials often discussed in alternative theories.