One of Russia's most prominent opposition leaders has been sentenced to 15 days in jail after being arrested at a New Year's Eve protest rally, according to AP. Boris Nemtsov, a former deputy Russian prime minister during Boris Yeltsin's presidency, was among 68 people arrested at an unsanctioned rally at a central Moscow square. He and other protesters gathered on the opposite side of the square from an authorized protest. Nemtsov was sentenced Sunday for failure to follow police orders, the state news agency RIA Novosti reported. The news agency Interfax quoted Nemtsov as saying the court refused to allow police and TV video recordings from the scene to be used as evidence. Nemtsov is one of the Kremlin's fiercest critics and a leader of Russia's fledgling Solidarity movement.