Jay Carney, Duped Patsy or Co-Conspirator?

Here is Jay Carney, the Obama Administration's press spokesman, on 9/14/12, answering a question from Jake Tapper about the deaths of Ambassador Stevens and three others on 9/11:



Either Carney was duped by his superiors into relaying a talking point that was, we now know, false in all of its major particulars -- there was no protest in Benghazi, there was a pre-planned attack, and the attack had nothing to do with an obscure Youtube video -- or else Carney is a co-conspirator in perpetrating a Big Lie on the American people.

So which is it?   And, either way, why should the media ever trust what he says again?