When an arrest is made without a warrant by an officer, he shall inform the person arrested of such officer's authority to make the arrest and the cause of the arrest.When an arrest is made by a private person, he shall, before making the arrest, inform the person to be arrested of the intention to arrest him and the cause of the arrest.When a person is engaged in the commission of a criminal offense, it is not necessary to inform him of the cause of his arrest.
Person arrested without warrant shall be informed of cause of arrest
Ohio Rev. Code Ann. § 2935.07, under Chapter 2935 | Arrest, Citation, and Disposition Alternatives.
Ohio Rev. Code Ann. § 2935.07