Haw. Rev. Stat. § 96-9: Investigation procedures.

(a) In an investigation, the ombudsman may make inquiries and obtain information as the ombudsman thinks fit, enter without notice to inspect the premises of an agency, and hold private hearings.

(b) The ombudsman is required to maintain secrecy in respect to all matters and the identities of the complainants or witnesses coming before the ombudsman except so far as disclosures may be necessary to enable the ombudsman to carry out the ombudsman's duties and to support the ombudsman's recommendations.