 On 27 December 2006, he accused Leonid Nevzlin, a former vice president of Yukos, exiled in Israel and wanted by the Russian authorities for a long time, of involvement in Alexander Litvinenko poisoning, a charge dismissed by the latter as a nonsense.On 16 January 2007, Chaika announced that the Tambov Gang had recently forcefully taken over 13 large enterprises in Saint Petersburg and was subject to an investigation.The leader of the gang, Vladimir Kumarin, was arrested on 24 August 2007.