Where should this case be tried?

A Rwandan military court has rejected a claim by militia members that they are not subject to military trial because they are civilians. Details here. The 25 defendants had been arrested by Congolese authorities in the DRC and were then turned over to Rwanda. "Lawyers had argued that the 25 were not members of the military at the time of their arrest and that Major (Rtd) Habib Mudathiru also retired from the army, making the entire group ‘civilians’ by status, who should be tried in a civilian court."