Now: the following is fiction.
By Presidential Order, he was relieved on December 18th, along with Admiral Kimmel CINCPAC, and CG, USAPac, Major General Short. However, because MacArthur had so many friends in Congress, and around the United States, President Roosevelt decided to keep MacArthur's firing quiet and bring him back to the States for an Army Article 70 Hearing and possible General Court-martial.
Continuing the fiction, this is the Article 70 hearing involving the Judge Advocate General Staff to determine whether Colonel Douglas Arthur MacArthur should be tried by court-martial.