Authorities are searching for the couple's son, Dylan Bennett, 22. The vehicle sought in connection with him was found outside of Minnesota.
Blaine Adamson argued that he shouldn't be compelled to promote messages that go against his religious beliefs.
He and his brother, Charles Koch, helped to build a massive conservative network of donors to support libertarian-leaning economic policies.
Ohio State has acknowledged its "fundamental failure" to prevent abuse by Richard Strauss, apologized publicly to the survivors.
The 33-year-old chef uncharacteristically missed work Monday. Cipriani Dolci released a statement Thursday saying Zamperoni "has been found deceased."