sentences:  In an interview he gave just before his death, he said 
  
  At the request of the "Novaya Gazeta" newspaper staff, the Investigative Committee of the General Prosecutor's Office of Russia reopened the investigation into his death on 27 October 2007.In April 2008, an Investigative Committee official said that there would be another test carried out on his tissue to ascertain whether there had been a case of poisoning.The Prosecutor General of Russia closed the criminal case in April 2009 after the examination has failed to prove poisoning or a violent death.