From AP:
Family and lawyers of an exiled leader of the 1989 Tiananmen Square pro-democracy protests pressed for his release Monday, nearly a year after he was sent to a mainland Chinese jail while trying to return to his homeland.
Zhou Yongjun, a permanent U.S. resident on track to become a naturalized citizen, was trying to enter Hong Kong in September last year when he was stopped by local officials and handed over to mainland Chinese authorities.
He is being held in a detention facility in his home province of Sichuan in western China, where one of his attorneys said he has been tortured and denied family visits.
See also a post from ESWN which compiles several reports in English and Chinese about Zhou Yongjun.
