Habeas corpus

https://en.wikipedia.org/wiki/Habeas_corpus

Habeas corpus (/ˈheɪbiəs ˈkɔːrpəs/ ⓘ; from Medieval Latin, lit. 'you should have the body')[1] is a legal procedure by which a report can be made to a court alleging the unlawful detention or imprisonment of an individual, and requesting that the court order the individual's custodian (usually a prison official) to bring the prisoner to court, to determine whether their detention is lawful.