Russian authorities today brought criminal charges against Lev Ponomarev, head of the All Russian Movement for Human Rights, accusing him of slandering General Yuri Kalinin, head of the Russian prison system. The charges result from accusations made by Mr. Ponomarev that Russia's prison system is inhumane and that, in some prisons, prisoners are routinely tortured and otherwise severely abused. In addition to the criminal charges, Mr. Ponomarev's travel documents were revoked and he was told he would be arrested if he attempted to leave the country.
In addition, I'm posting here other articles related to his visit in the U.S. and return to Russia:
"Holding Medvedev to his words", Washington Post, 2/25
Announcement of charges against Mr. Ponomarev [in Russian]:
"Putin's Political Prisoners" in Wall Street Journal, 2/19, Opinion by Bret Stephens