Wis. Stat. § 818.25: Sheriff’s liability.

If, after being arrested, the defendant escape or be rescued, or bail be not given or justified, or a deposit be not made instead thereof the sheriff shall himself or herself be liable as bail. But the sheriff may discharge himself or herself from such liability by the giving and justification of bail as provided in ss. 818.16 to 818.19, at any time before process against the person of the defendant to enforce an order or judgment in the action.