(1) In this section:
(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).
(2) Whoever does any of the following is guilty of a Class I felony:
(a) Intentionally causes damage or threatens to cause damage to any physical property owned by a person who is or was a witness by reason of the owner having attended or testified as a witness and without the owner’s consent.
(b) Intentionally causes damage or threatens to cause damage to any physical property owned by a person who 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 owner’s consent.