This document consists of an anonymous letter from a self-identified FSB officer sent to Deputy Sergey Adamovich Kovalyov, who chaired the independent commission investigating the 1999 apartment bombings. The whistleblower alleges that the FSB’s 2nd Department, responsible for anti-terrorism, established a corrupt foundation called 'Zashchita Otechestva' to extort funds from businessmen. Key FSB officials named as leaders of this scheme include Alexander Zhdan'kov, Ivan Mironov, Gennady Solovyov, and Alexander Shagako, with alleged backing from Deputy Director Vladimir Pronichev. The letter claims these officials issue fake IDs to criminals and divert foundation funds for personal enrichment. Most significantly, notes on the envelope or enclosure explicitly link the 2nd Department to the September 1999 residential building explosions in Moscow, suggesting the whistleblower intended to provide context for the bombing investigations.