A moment from tonight's ARROW

I'm a fan of ARROW, but sometimes it gets a little weird. This moment from tonight's episode was a case in point. (This isn't the original dialogue verbatim, but since I don't have a perfect memory, you'll have to settle for me giving you the gist.)
OLIVER: Do you think I'm just going to let you walk out of here? You may not have killed Sara, but you're still a murderer!
MALCOLM: What are you going to do, arrest me? I can escape from any prison. So your only real choices are to let me go or kill me. And I hear you're not a killer anymore.
OLIVER: Shucks, when you put it that way, I guess I'm stymied. Run along, then.
You know, Oliver, you could TRY putting him in jail and see what happens.