The Moscow Public Oversight Commission, which is an independent body of prison overseers, as well as the president's human rights council, which is the human rights council that reports to the president, did an independent investigation, and both concluded that he was tortured in prison, that his right to life was violated, that he was beaten before his death, that he probably died as a result of his beating, and that he was left untreated for a number of very serious medical ailments when they were deliberately not providing treatment. It's not me saying it. All sorts of independent bodies are saying that.
On December 11th, 2012. See this statement in context.