Kiddushin 43: Is the Hitman Liable or Is the One Who Hires Him?
More on the topic of sending an agent to do a sin - in this case, specifically, murder. With parallels to King David, in his efforts to hide his affair with Batsheva. Also, can a shaliach (agent) be a witness? Some key disputes flesh out the concerns.
The skinny
The skinny isn't ready yet — notes appear once the transcript is processed.