Some articles on ryaguzov:

Assassination Of Anna Politkovskaya - The Trial
... by the Russian domestic secret service (FSB) and, personally, by FSB Colonel Pavel Ryaguzov who provided him with a forged passport ... Ryaguzov was another suspect in the case ... An attorney for Ryaguzov objected to this disclosure on the grounds that the alleged connections of Makmudov with FSB represent a "state secret" ...