Conversation so far:
what dentention was Chen Guangcheng involved in?
the Chinese government, stated that on 5 February 2006, Chen instigated others "to damage and smash cars belonging to the Shuanghou Police Station and the town government.
what became of this?
Chen was removed from his house in March 2006 and was formally detained in June 2006 by Yinan county officials.
why was he detained by Yinan county officials?
He was scheduled to stand trial on 17 July 2006 on charges of destruction of property and assembling a crowd to disrupt traffic.
Are there any other interesting aspects about this article?
On the eve of his trial, all three of his lawyers, including Xu Zhiyong of the Yitong Law Firm, were detained by Yinan police.
did he face the charges for destruction of property?
On 24 August 2006, Chen was sentenced to four years and three months for "damaging property and organizing a mob to disturb traffic".
did he get out early?
CANNOTANSWER.
what was his greatest accomplishment?
CANNOTANSWER.
what is the most important fact in this article?
Following the trial, Amnesty International declared him to be a prisoner of conscience, "jailed solely for his peaceful activities in defence of human rights".

Question: was he ever released?
Self-contained rewrite: was Chen Guangcheng ever released?