 He tells LaGuerta about this and she doesn't believe him stating she would have known if Doakes had a boat.They find a tackle box from the old cabin with a key inside to a marina and, believing it to be Doakes's old boat spot, search the area and find several sheets of plastic, knives and one with degraded blood on it with Doakes's fingerprints on it.This causes Tom to immediately believe Dexter, but LaGuerta still believes otherwise stating Dexter could have planted it (which is actually true).