When police to wear badges

Ohio Rev. Code Ann. § 4973.20, under Chapter 4973 | Employees; Police Officers.

Ohio Rev. Code Ann. § 4973.20

Except while acting in the discharge of duty as a detective for the railroad, every policeman appointed under section 4973.17 of the Revised Code shall, when on duty, wear in plain view a metallic shield with the word "police" and the name of the railroad for which he is appointed inscribed on it.