(a) (1) Each investigation conducted under this subtitle is confidential.
(2) Except as otherwise provided in this section, a person who participates in an investigation may not disclose the name of a person under investigation, the name of a witness, or any other information obtained in the investigation.
(b) A person who participates in an investigation may disclose information to:
(1) the person under investigation; and
(2) a person to whom disclosure is required in the discharge of an official duty.