The best texts insert οὖν, therefore. The rendering of the aorist by the pluperfect here is inadmissible, and is a device to bring this examination of Jesus into harmony with that described in Mat 26:56-68, and to escape the apparent inconsistency between the mention of the high-priest (Caiaphas) as conducting this examination and the statement of Joh 18:13, which implies that this was merely a preliminary examination before Annas. Render, Annas therefore sent him.
Bound
Probably He had been unbound during His examination.