Wisconsin Statutes Crimes (Ch. 938 to 951) § 940.201. Battery or threat to witnesses

(a) “Family member” means a spouse, child, stepchild, foster child, parent, sibling, or grandchild.

(b) “Witness” has the meaning given in s. 940.41 (3).

(a) Intentionally causes bodily harm or threatens to cause bodily harm to a person who he or she knows or has reason to know is or was a witness by reason of the person having attended or testified as a witness and without the consent of the person harmed or threatened.

(b) Intentionally causes bodily harm or threatens to cause bodily harm to a person who he or she knows or has reason to know is a family member of a witness or a person sharing a common domicile with a witness by reason of the witness having attended or testified as a witness and without the consent of the person harmed or threatened.