User blog comment:Skyzy/The 100 Season 3 Trailer/@comment-25176701-20151215210559/@comment-25176701-20151215222841

You must like Murphy a lot. Seeing that guy everywhere lol.

Anyway, it wasn't Murphy. When Titus flips the man on the floor if you pause the trailer quickly, you can see he has a different face, hairstyle, and build. The man was in the same room (or a very similar one) as the one where Clarke confronted Emerson all chained up. That's why I'm assuming it was Emerson.