Any judge of the Superior Court, on information to him that any person is unjustly deprived of his liberty by being detained or confined in any hospital for psychiatric disabilities, or in any place for the detention or confinement of persons with psychiatric disabilities, or in custody and control of any individual under an order of a court of probate, may appoint a commission of not fewer than two persons, who, at a time and place appointed by them, shall hear any evidence offered regarding the case. Such commission need not summon the party claimed to be unjustly confined before it, but shall have one or more private interviews with him and shall also make inquiries of the physicians and other persons having charge of such place of detention or confinement, and within a reasonable time thereafter report to such judge the facts and its opinion thereon. If, in its opinion, such person is not legally detained or confined in such place, or is cured, or his confinement is no longer beneficial or advisable, such judge shall order his discharge; but no commission shall be appointed with reference to the same person more often than once in six months. The judge before whom any of the proceedings provided for in this section are had may tax reasonable costs at his discretion.