Wis. Stat. § 782.39: Concealment of person entitled to writ.

Any person who has custody of or power over a person who is entitled to a writ of habeas corpus or for whose relief such a writ has been issued, who shall, with the intent to elude the service of such writ or to avoid the effect thereof, transfer such prisoner to the custody or control of another, or conceal the prisoner or change the place of confinement and every person who assists in so doing shall be fined not more than $1,000 or imprisoned not more than 6 months or both.