one of them, he believed, was a lieutenant colonel with the police, artem kuznetsov, the man who ledagnitsky took his evidence to prosecutors, testified and demanded an investigation. he got one, but not the one he expected. in an extraordinary turn of events, the police raided magnitsky's apartment; his arrest warrant had been ordered by the same artem kuznetsov. tell me about the moment he was arrested. what did the police officers tell you? magnitsky's wife, natalia, says that he was arrested for tax evasion. >> natalia ( translated ): they didn't tell me anything. sergei tried to calm me down. he said to me, "i will be back tomorrow." and we expected that he would be back the next day or the day after that. and he was in prison for about a year. >> browder: they put him in pretrial detention, and then they began to torture him to get him to withdraw his testimony. >> pelley: what do you mean torture him? >> browder: they put him in cells with no windows and no heat in december in moscow, so he nearly froze to death. they put him in cells with no toilet, just a hole in the floor w