Theories
Aaron's Victim Buried On The Trail

Warning This Section Does Contain Spoilers

John William James is displeased with Aaron and he has give him a list of names of three people that he must choose from to kill. Aaron most likely chose John Blaine because of his distain of John's lifestyle of having the home in Martha's Vineyard that he only spends a few weeks a year at and because so many people look up to him. Which is a contradiction to how he views JWJ. He is expected to kill one of these people and dispose of the body. We receive the constellation print and the map. When over laying the constellation print over the map we see that it points to a trail on the map. This is most likely where Aaron buried his victim.