In this subtitle the following words have the meanings indicated. In Harford County, “agency” means the Office of the Sheriff of Harford County. “Correctional officer” has the meaning stated in § 8–201 of this article. “Correctional officer” does not include an officer who is in probationary status on initial entry into the correctional agency except if an allegation of brutality in the execution of the officer’s duties is made against the officer. “Hearing” means a proceeding during an investigation conducted by a hearing board to take testimony or receive other evidence. “Hearing” does not include an interrogation at which no testimony is taken under oath. “Hearing board” means a board that is authorized by the managing official to hold a hearing on a complaint against a correctional officer. “Internal investigation unit” means the internal investigation unit of a correctional facility charged with the investigation of complaints within a correctional facility. In Harford County, “managing official” means the Sheriff of Harford County.