You wanted to know how Ishy could have done it? Well, I suppose the DO can sence when one of the Forsakens die, he does have a link with them. The DO sends Moridin, who I believe to be Ishamael to kill the traitor. Ishy uses the true scource and travels to Chamerlyn, finds Asmodean, scares the living daylights out of him, blasts him, and then leaves.