The UCMJ Article 32 proceedings will coninue until a case can be made for taking the accused to courts martial.
Based on the limited info now available to use, the accused could be charged under the following articles, depending on their level of involvement:
Article 77, Principals: Any person punishable under this chapter who--
(1) commits an offense punishable by this chapter, or aids, abets, counsels, commands, or procures its commission or,
(2) causes an act to be done which if directly performed by him would be punishable by this chapter, is a principal.
Article 81, Conspiracy: Any person subject to this chapter who conspires with any other person to commit an offense under this chapter shall, if one or more of the conspirators does an act to effect the object of the conspiracy, be punished as a court-martial may direct.
Article 82: Solicitation: (a) Any person subject to this chapter who solicits or advises another or others to desert in violation of section 885 of this title (article 85) or mutiny in violation of section 894 of this title (article 94) shall, if the offense solicited or advised is attempted or committed, be punished with the punishment provided for the commission of the offense, but, if the offense solicited or advised is not committed or attempted, he shall be punished as a court-martial may direct.
(b) Any person subject to this chapter who solicits or advises another or others to commit an act or misbehavior before the enemy in violation of section 899 of this title (article 99) or sedition in violation of section 894 of this title (article 94) shall, if the offense solicited or advised is committed, be punished with the punishment provided for the commission of the offense, but, if the offense solicited or advised is not committed, he shall be punished as a court-martial may direct.
Article 90: Assaulting or willfully disobeying a superior commissioned officer. Any person subject to this chapter who--
(1) strikes his superior commissioned officer or draws or lifts up any weapon or offers any violence against him while he is in the execution of his officer; or
(2) willfully disobeys a lawful command of his superior commissioned officer;
shall be punished, if the offense is committed in time of war, by death or such other punishment as a court-martial may direct, and if the offense is committed at any other time, by such punishment, other than death, as a court-martial may direct.
Article 92: Failure to obey a lawful order or regulation. Any person subject to this chapter who--
(1) violates or fails to obey any lawful general order or regulation;
(2) having knowledge of any other lawful order issued by any member of the armed forces, which it is his duty to obey, fails to obey the order; or
(3) is derelict in the performance of his duties;
Article 94: Mutiny or Sedition. (a) Any person subject to this chapter who--
(1) with intent to usurp or override lawful military authority, refuses, in concert with any other person, to obey orders or otherwise do his duty or creates any violence or disturbance is guilty of mutiny;
(2) with intent to cause the overthrow or destruction of lawful civil authority, creates, in concert with any other person, revolt, violence, or disturbance against that authority is guilty of sedition;
(3) fails to do his utmost to prevent and suppress a mutiny or sedition being committed in his presence, or fails to take all reasonable means to inform his superior commissioned officer or commanding officer of a mutiny or sedition which he knows or has reason to believe is taking place, is guilty of a failure to suppress or report a mutiny or sedition.
(b) A person who is found guilty of attempted mutiny, mutiny, sedition, or failure to suppress or report a mutiny or sedition shall be punished by death or such other punishment as a court-martial may direct.
Depending on the circumstances, they might be charged with more...or less of the aggregate of the charges listed above.
One should note: At least two of the charges above carry with them the ultimate penalty if convicted in a time of war. Since the "legal" definition of war has not been put into place here by a formal declaration of war, the death penalty is probably not on the table. That said...the ringleaders could be looking at long prison terms...unless Monsieur Kerry wins, then they'll all get medals and a triumphant parade, followed by a fast pardon.