User blog comment:Mayank Rananavare/Theory on what happens after Arrow S03E09 "The Climb"/@comment-216.121.236.180-20141211174359

I think Maseo (or whatever his name is in the league) told Ras that Oliver wouldn't have killed Sara. Or Ras didn't believe Oliver's story. In an attempt to get the secret from him, they went on with the duel but drugged him with the same drug mentioned twice in the episode (The one used on Thea and the one used to get Omega). If you watch Ras could have ended the fight several times when Oliver was knocked down, Oliver did have his back to Ras many times. By the way, this is the first time we've heard of this drug. Meaning it very well may have been thrown in our faces so we knew about it before Oliver 'died'.

Ras stabbed Oliver in the chest. The only time we see the wound is the same clip Ras stabbed him. Every other time we see Oliver's chest, there is no wound. However there is blood on his lips the entire time. (This can be explained by a continuity error)

Lastly, Ras has to have known something because of what he said before pushing Oliver off the cliff. "Forgive and have mercy on him, excuse him and pardon him, make honorable his reception, protect him from the punishment of the grave and the torment of the Fire." Unless Ras is attempting to send Oliver to heaven? and not hell? (Unsure in this universe if the League follows a pantheon of gods or if they even are religous)