Board Thread:Spoilers!/@comment-6026139-20140818212107/@comment-4821842-20140819030923

Maybe Rumple coomunciated with his ghost and attacked as his apprentince, in 3.18 it's been stated to talk to the dead you need the murder weapon and the murderer and Rumple killed Zoso and had the dagger he used to kill him with, so he could have easily talked to his ghost