Update: After some research, it is clear that this is not Hasan's first time appealing to CAAF. However, it does not appear that Hasan is actually appealing, rather it is his appellate defense counsel. At Hasan's trial, the military judge sealed materials as privileged between Hasan and his standby counsel. Normally, appellate defense counsel would be able to review those materials without judicial intervention, however, Hasan will not authorize access. Given this background and two writs being filed with CAAF, it is highly likely that appellate defense counsel is once again trying to gain access to Hasan's trial materials.
"No. 21-0015/AR. Nidal M. Hasan, Petitioner v. United States Army Court of Criminal Appeals, Respondent and United States, Real Party In Interest. CCA 20130781. Notice is given that a petition for extraordinary relief in the nature of a writ of mandamus and brief in support were filed under Rule 27(a), on this date."
Note: Hasan also filed a writ of prohibition earlier this month.