Shep and Norman Dag
Shep and Norman are twins but lived very different lives.
Shep made many bad decisions and ended up as a member of The Fang. Norman, settled down and got married and the two found themselves fighting along the road between Lochfort and Whitehedge.
A party happened along to break them up and as the story goes, Shep slept with Norman's wife who was unaware of the deceit. During the telling of the story, Shep stabs Norman, killing him and the group ties up Shep and takes him to the authorities in Whitehedge.
Arc 2, Episode 7