It is my opinion that Morphey knew what he was involved in: If Morphey wasn't part of this plot, why did Drew give him the phone to hold? If he wasn't involved, wouldn't Drew just put his phone on silent, hide it in a cabinet, then go make the call? If Morphey did know, Drew would make him a further accessory to the crime, therefore, giving him more blackmail ammo to keep him quite. Why else is Morphey not coming forward with more info? Why is he having "memory lapses" about the time frame around the barrel moving?