Calls for Russia to probe human rights lawyer death

Russian authorities are under continuing pressure to investigate the death of a lawyer who died in prison almost two years ago.

Human rights activists believe Sergei Magnitsky was imprisoned after uncovering a massive tax fraud involving among others, the police.

Officials insist the conditions in the jail where he was held have since improved.

The BBC's Oleg Boldyrev was given a rare chance to go inside the prison.