This collection of documents chronicles the legal investigation into the 1999 apartment bombings, specifically focusing on the Volgodonsk attack and the prosecution of key figures Adam Dekkushev and Yusuf Krymshamkhalov. Following his 2002 extradition from Georgia, Dekkushev provided testimony regarding the manufacture of explosives at a mill in the village of Mirny using a specific mixture of ammonium nitrate, aluminum powder, and sugar, rather than pure hexogen or RDX. While Dekkushev admitted to involvement in the Volgodonsk bombing, he claimed Achimez Gochiyayev’s group carried out the Moscow residential attacks independently, transporting approximately 10 tons of explosives to the capital. The narrative tracks the procedural evolution of Criminal Case No. 103, showing how FSB officials like Rozanova A.A. and Romanovsky V.V. handled the early investigation before it transitioned to the Prosecutor General’s Office under Zipunnikov I.I. The documents also detail the formation of the 'Mutafadjirat' (Explosives Experts) unit under Abu Umar and logistical support from Emir Al-Khattab. Although these files do not mention the Ryazan incident or early announcements by Seleznyov, they provide a granular look at the forensic evidence, including 1,200 forensic examinations for Krymshamkhalov used to justify extended detention during the 2003 legal proceedings.