detainee

noun

1. Someone who is detained, especially in custody or confinement.

   “In his statement, Miliband said the two flights had refuelled at Diego Garcia. Each one had a single detainee on board who did not leave the aircraft.”

   “Louis Louaillier, a U.S. citizen, journalist, and assemblymember, wrote in his local newspaper, The Louisiana Courier, that detainees should go to a civil judge...”

   “More than 3,000 people have been arrested since Jan. 9. The police have even released images of some detainees stripped down to their underwear, recalling images from Mr. Bukele's infamous megaprisons.”