In Re Frye

The general rule is that a witness, especially when not a party to the controversy, may be required to testify upon any subject concerning which judicial inquiry is made and upon which he possesses specific personal information. To this general rule, there are certain well recognized exceptions. A witness may always claim as privileged that which tends to incriminate him. Article V, Amendments, U. S. Constitution, and Section 10, Article I, Constitution of Ohio.

Also, under Section 11494, General Code, a witness who stands in either of several relationships named in the statute shall not…