Board Thread:Spoilers!/@comment-25926288-20161101150057/@comment-24674051-20161101194143

I don't see 6-year old James as a murderer. And keep in mind that King George was not aware that there was a twin brother until Rumple told him AFTER James death, so George would not have a motive (that we know of) to want daddy charming dead.

But seeing the return of KIng George/Albert Spencer fuels my suspicion that the murder has something to do with Daddy Charming and his knowledge of Prince James. (which points even more towards Rumple as the possilbe culprit, or at least the mastermind behind the act.)