Inmate Clyde Piggie appeals from the denial of his petition for a writ of habeas corpus under 28 U.S.C. § 2254 seeking relief from three convictions by the disciplinary board at Indiana’s Maximum Control Facility. We affirm the district court’s judgment except as to Piggie’s due process claim that he was denied access to a videotape of the incident underlying his conviction for battery. As to that claim, we vacate and remand for further proceedings.
Background
Piggie’s three convictions stem from several acts of insubordination during a two-day period in March 2001. The first incident occurred on the afternoon of March 11, when Piggie refused to return his food tray. Correctional officer Sergeant Mon-zon approached Piggie’s cell and ordered him to “cuff up.” As far as we can tell, such an order meant for Piggie to place his hands through an opening in his cell door so that he could be handcuffed and that Monzon could enter the cell safely. According to Sergeant Monzon, however, Piggie refused to comply with this order. Piggie says that Sergeant Monzon did not open the cuffport to his cell. Shortly thereafter a five-member “extraction team” assembled outside Piggie’s cell. Piggie again was ordered to cuff up, and again he refused. The team, accompanied by an officer with a video camera, then entered Piggie’s cell and attempted to restrain him. Piggie resisted, allegedly shoving one of the officers, Officer Grott. The following evening, on March 12, Piggie again refused to return his food tray when ordered to do so by prison staff.
Piggie was charged with “refusing to obey an order” for defying both the March 11 order to cuff up and the March 12 order to return his food tray, and with “battery” for pushing Officer Grott. Piggie denied all three charges, requesting statements from numerous witnesses including an inmate named Judge Merriweather. But, according to a form prepared by Piggie’s screening officer, Merriweather refused to provide a statement. Piggie also asked that the prison’s Conduct Adjustment Board view videotapes of the three incidents.
The CAB found Piggie guilty of both refusing-to-obey charges at a hearing on March 22, 2001, and imposed a 60-day restriction on his telephone and recreation privileges. The CAB heard Piggie’s battery case the following week and found him guilty based on Officer Grott’s conduct report and corroborating statements from the other members of the extraction team. The CAB’s written decision in the battery case also indicates that it reviewed the videotape, but does not state what, if anything, the videotape revealed. The CAB recommended that 180 days of Piggie’s good time credits be revoked and that he be demoted from credit earning class I to III. Piggie appealed, but the administrative tribunals affirmed his convictions. The prison superintendent did, however, reduce Piggie’s punishment by increasing his credit-earning class from class III to II.
Piggie then filed this habeas corpus petition under § 2254, claiming that the three disciplinary proceedings did not comport with due process because (1) he was denied the right to call inmate Merriweather as a witness; (2) the CAB refused to view, or permit him access, to the videotapes; (3) the evidence was insufficient to support his convictions; and (4) the CAB committed these due process violations in retalia
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tion for his litigiousness. In addition, Pig-gie moved to compel the state to produce the videotapes and asked that the district court inspect them
in camera.
The district court denied Piggie’s motions as premature, since the state had not yet responded to the petition. After the state submitted its response, the district court denied Piggie’s petition, concluding that his challenge to the two refusing-to-obey convictions was moot because -the sanctions imposed had expired and, in any event, the loss of telephone and recreation privileges did not implicate a liberty interest protected by due process. As for the battery conviction, which resulted in a loss of earned good time and a reduction in credit-earning class, the court concluded that the CAB hearing satisfied due process because the record revealed that Merri-weather had refused to provide a statement, and that the CAB had examined the videotape, which Piggie had no right to view himself because the Supreme Court has never extended the rule of
Brady v. Maryland,
Analysis
As an initial matter, we decline Indiana’s invitation to revisit our decision in
Walker v. O’Brien,
On appeal Piggie renews the arguments rejected by the district court that his CAB hearing on the battery charge did not satisfy due process. Piggie has a liberty interest in earned-credit time and his credit-earning class, and therefore was entitled to due process before either could be taken away.
Piggie
v.
McBride,
Piggie first insists that he was denied the right to call Merriweather as a witness to defend against the battery charge. Inmates have a due process right to call witnesses at their disciplinary hearings when doing so would be consistent with institutional safety and correctional goals,
Wolff,
This controversy does not warrant further consideration, however. Conspicuously absent from Merriweather’s affidavit is any indication of what his testimony might have been or how it would have aided in Piggie’s defense. Nor does Piggie himself explain how Merriweather’s testimony would have helped him. Therefore, even if this factual dispute were to be resolved in Piggie’s favor, we are unable to see how Piggie was harmed by the screening officer’s alleged conduct.
See Powell v. Coughlin,
Piggie next argues that the CAB refused to view, or permit him to watch, the videotape of the cell extraction, which, he says, would have shown that he did not hit Officer Grott. Although Piggie is correct that the CAB could not arbitrarily refuse to consider potentially exculpatory evidence,
see Piggie,
However, Piggie also contends that having been excluded from the room, he was unable to show the CAB where on the videotape to look and, thus, was precluded from presenting evidence favorable to his defense. We have held that the rule of
Brady v. Maryland,
The district court acknowledged this authority, but concluded that
Brady
did not warrant disclosure of the tape to Piggie because the Supreme Court had not held that the
Brady
rule applied in prison
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disciplinary cases. This was error. At one time this court had suggested that prisoners challenging the decision of a disciplinary board must find support in decisions of the Supreme Court in order to obtain habeas corpus relief pursuant to 28 U.S.C. § 2254(d),
see Sweeney v. Parke,
Based on this erroneous conclusion, the district court, without conducting an
in camera
review to evaluate whether the video was, in fact, exculpatory as Piggie claims or assessing whether the state had a legitimate security reason to withhold the tape in any event, determined that Piggie was not entitled to view the videotape. Piggie would not have been entitled to disclosure under
Brady
if his viewing the tape would entail a security risk, and we have had no trouble approving of nondisclosure where prison officials have asserted a bona fide security justification, for example, that if the inmate were permitted to watch the tape, he might learn the location and capabilities of the prison surveillance system, thus allowing him to avoid detection in the future.
Gaither,
Nor can we say, on this record, that the CAB’s refusal to give Piggie access to the videotape was harmless. Although
Brady
compels only the disclosure of material evidence that is favorable to the accused,
see Gaither,
*680 On remand, the district court should answer one, and perhaps two, questions. First, did the state have a valid security-reason for failing to disclose the tape and, second, if not, did the tape contain exculpatory information? Finally, if the answer to this second question is affirmative, was the error harmless?
We therefore Affirm in part and Vacate and Remand in part for further proceedings consistent with this opinion.
