How Long is too Long

How long should the US be able to hold someone accused of terrorist activities before they are either indicted or released? (I am assuming that once indicted the judicial proceedings will commence as quickly as is possible) The two sides of the issue are as follows: some believe that the accused are to be indicted immediately upon their arrest or they are free to leave, (Mirroring the American judicial system) while others believe that they are allowed to be held in custody as long as it takes for the prosecutors to gather evidence against them. I have a major problem with the first view and it is the same one which I have held for the entirety of this blog; that we should not provide an accused foreign terrorist with the same rights as an American citizen. If we are forced to indict every accused person upon their arrest or release them after 24 hours, we will be placing many dangerous people back out into the world where they can continue to do harm. I recognize that in allowing the detainment of accused persons without indictment we will likely be holding innocent people for an extended period of time. However, in the current climate of the world, it remains in our best interests to do so. We would be better off protecting our troops, American citizens, from harm rather than defending the rights of a foreign national. As for holding them indefinitely and without reason I also disagree. I believe that there needs to be a military review panel that goes over the intelligence gathered with each accused person and they decide whether that person should be held until they can be tried or immediately released.