“Prisoner” means any person who is either arrested, incarcerated, imprisoned or otherwise detained in excess of 12 hours by any law enforcement agency of this state, except when detention is pursuant to s. 51.15, 51.20, 51.45 (11) (b) or, 55.13, or 55.135 or ch. 980. “Prisoner” does not include any person who is serving a sentence of detention under s. 973.03 (4) unless the person is in the county jail under s. 973.03 (4) (c).