detainee:
(plural: ‘detainees‘)
a person (detained) kept in custody from leaving a place during a certain period of time officially, especially for political reasons, often held in a camp or in his/her own place but not in a prison,

detainees in a prison cell
A Detainee Locator System is an online web search for any detainee whose whereabouts are not known to the local officers concerned.
As with any person who is arrested by the authorities, detainees of any kind have certain rights and if the authorities who have detained him/her can ask for legal help.
There are numerous reports about political detainees at Guantanamo Bay, a US prison, being ill-treated by the USA prison guards and the investigating agencies, and there are demands of the highest level from all over the world for the release of all kinds of detainees or, at least, for court trials at an early date.
