The name of any person who has escaped from any institution for persons with psychiatric disabilities and has not been returned to such institution within one year thereafter shall be stricken from the records of such institution and such person shall not thereafter be returned to such institution except (1) upon further commitment by some court of competent jurisdiction, or (2) in the case of an acquittee committed to the jurisdiction of the Psychiatric Security Review Board pursuant to section 17a-582, by order of the Psychiatric Security Review Board. Upon such further commitment, the state or local police department shall, on the request of the authorities of any such institution, assist in the rehospitalization of such patient if, in the opinion of such authorities, the patient’s condition warrants such assistance. The expense, if any, of such return shall be paid by the patient or the patient’s legally liable relatives or, if none, by the state, but the expense provision herein contained shall not be construed to apply against a rehospitalized patient when criminal proceedings are pending against the patient.