One of the consequences of the murder of Natalia Estemirova, an employee of the Chechen office of the Human Rights Centre (HRC) "Memorial", committed on July 15, 2009, which aroused a broad public resonance in Russia and abroad, was the litigation under the claim lodged by President of Chechnya Ramzan Kadyrov against Oleg Orlov, head of the HRC "Memorial", who had stated Kadyrov's guilt in Estemirova's murder. The "Caucasian Knot" follows the course of events and offers its readers the chronicle thereof.