Board Thread:Character Discussion/@comment-6175354-20161010033114/@comment-27060727-20161010045803

I think it's pretty safe to guess that it's someone that we know......

And out of the mains, Hook and Rumple are the only possible suspects to begin with. (David, Snow, & Belle were really young and teen Regina probably didn't kill anyone)  Rumple has already been involved and it looks like only to the intent of coming into possession of the coin, so I'm going to rule him out too.

Couple all of that with how the two actors and the writers have been teasing some upcoming Hook/David drama, I'd be surprised if it wasn't Hook. However, I wonder if there is a chance that his father isn't actually dead - considering surprising people from characters' pasts are popping up this season from the Land of Untold Stories.