I don't think so. If something happened to EB and she was wrapped in a blanket and transported somewhere, and if whoever did it returned with that blanket still in their car, middle of the night, possibly high, I could totally imagine them wanting to get a piece of evidence out of the car, thinking, "I'm not going to bring it inside the house in case the police search the house," not having the time or energy to go out again at that point, and thinking, "They'll never look under the house." It would call more attention if they burned the blanket (or whatever it was) somewhere and were seen, than just being under their own house in the middle of the night, where they could just say they were checking on a pipe if a neighbor happened to see them.