Responses

Nahan and Yuder (MC) interrogated the guards, after that Yuder left to get Kiolle and Nahan supposed to stay and keep an eye on the guards. But the moment Yuder left, Nahan killed them all and followed Yuder to kill Kiolle too. He confessed to Yuder in Ch56, that's why Yuder knows that everyone else is dead.
What! dead? how?