A disciplinary committee found petitioner guilty of possessing a knife in his prison cell. Petitioner did not contest that a knife was found in his cell, but strenuously insisted that he never knew the knife was there, and that it must have been “planted” in his cell by somebody.

At the disciplinary hearing much time was devoted to the question of whether petitioner was required to keep his cell door locked when he was not in it. At the conclusion of the hearing, the presiding officer stated:

“* * * We feel that you are responsible for what is in your cell, especially when you have control of the key of your cell yourself * * #.”

This issue was also prominent in the committee’s written decision:

“* * * [Petitioner] stated that his understanding of the rules were that if he went to take a shower or was to be gone a short while, he did not have to lock his cell. The officer in charge of A Block assured the Committee that the rule in A Block is that every inmate must lock his cell any time he is not in the cell.①

# # * *

“* * * Inmate Earp is required to lock his cell at all times when he is not in the cell.

«# # # # #

*609“Inmate Leroy Earp did violate Major Rule Eight, Possession, Manufacture or Use of Dangerous Contraband, Paragraph A. Weapons. The Disciplinary Committee considers violations such as detailed here where inmates are in possession of weapons to be extremely hazardous and cannot be tolerated.

“Decision and recommendations: The Disciplinary Committee reeommen4s that Inmate Earp serve Segregation from February 9, 1975, the date he was placed in segregated status because of this report, through June 9, 1975 and further recommends that he be removed from A Block * *

We cannot tell from the committee’s decision whether petitioner’s obligation (if any, see n 1, supra) to lock his cell was relied upon as circumstantial evidence tending to negate the “plant” defense, or whether the committee was really finding petitioner guilty of failing to lock his cell door. A finding of guilt on one charge cannot be predicated on a finding of guilt on another charge that was never made.

The committee’s decision was reviewed by the prison superintendent pursuant to Rule VI which provides :

“The superintendent shall personally review each case within a reasonable time thereafter and he shall:

“a. Affirm the disposition imposed by the disciplinary committee; or

“b. Modify the disposition imposed by the disciplinary committee; or

“c. Reverse the conclusion of the disciplinary committee * *

The superintendent’s full decision on review reads: “Reduce penalty to 30 days, reasonable doubt as to intent.”

*610We cannot tell from the superintendent’s decision whether and to what extent he doubted that the evidence sufficiently established the charge of possession of a weapon. The relevant rule contains no reference to “intent.”② A “compromise verdict” resulting in a reduced penalty cannot be a substitute for the superintendent’s duty to independently review the issue of petitioner’s guilt or innocence.

Reversed and remanded.