The Board may administer oaths, summon witnesses before it in a case under investigation, and discharge by its order, in writing, any person confined as a patient in a hospital whom it finds on investigation to be wrongfully hospitalized or in a condition to warrant discharge. The Board shall discharge patients, not criminals, who have eloped from a hospital and have not been apprehended at the expiration of six months from the time of their elopement. The Board shall not order the discharge of a patient without giving the superintendent of the hospital an opportunity to be heard. (Added 1967, No. 305 (Adj. Sess.), § 1, eff. Oct. 1, 1968.)