At Butyrka, his health completely broke down. He was in agonizing pain. He and his lawyers wrote 20 desperate requests for medical attention, filing them with every branch of the Russian criminal justice system. All of those requests were either ignored or explicitly denied in writing.
After more than three months of untreated pancreatitis and gallstones, Sergei Magnitsky went into critical condition. The Butyrka authorities did not want to have responsibility for him, so they put him in an ambulance and sent him to another prison that had medical facilities. But when he arrived there, instead of putting him in the emergency room, they put him in an isolation cell, chained him to a bed, and eight riot guards came in and beat him with rubber batons.
That night he was found dead on the cell floor.
Sergei Magnitsky died on November 16, 2009, at the age of 37, leaving a wife