Army spokesman Maj. S. Justin Platt said he didn't know when Osborn would arrive at Fort Hood. It's unclear when hearings in the case will resume.
Last year, Osborn presided in a death-penalty case, the court-martial of an Army sergeant based at Fort Stewart, Ga.
Sgt. Joseph Bozicevich, of Minneapolis, was sentenced to life in a military prison without parole for shooting and killing his infantry squad leader and another U.S. soldier in Iraq after they criticized him for poor performance. Bozicevich was spared a death sentence because the jury's decision to convict him of premeditated murder was not unanimous, which removed the death penalty as an option.