 The police investigation was finished on August 7, 2007.According to the investigation, Kostyrev, Tikhomirov and Zhukovtsev were members of the nationalistic club The Saviour.The leader of the club, Nikolay Korolyov (a former FSB officer), and two more club members, Sergei Klimuk and a police academy student Nikita Senyukov, were co-indicted with Kostyrev, Tikhomirov and Zhukovtsev on the charges of murder, terrorism, organizing a criminal gang and illegal production and storage of explosives.