just throwing this to the wind
Even the police may be charged with false imprisonment if they exceed their authority (such as detaining someone without justification).
In fact, any person who intentionally restricts another’s freedom of movement without their consent (and without legal justification) may be liable for false imprisonment, which is both a crime and a civil wrong. It can occur in a room, on the streets, or even in a moving vehicle—just as long as the subject is unable to move freely, against his or her will.
Similarly, “false arrest” is when someone arrests another individual without the legal authority to do so, which becomes false imprisonment the moment he or she is taken into custody.