IMO, the vehicle theory dosen't add up. For starters, the only two (surviving?) witnesses of the abduction did not report seeing or hearing a car. Also, after running several feet away from the abduction scene, one of the kids actually looked back towards the abduction scene and observed that jacob had dissapered. I don't know how much time had elapsed from the moment the child looked back, but it seems logical that under life or death circumstances (remember the Perp told the kids that he would shoot if they looked back), the child would have waited until a momonet in which he felt safe to look back, hence a considerable amount of time had elapsed. At the same time, If a car were used, the perp would have wanted to get away ASAP. Therefore, the child would have heard a car door slam, or saw a car speed of. Yet, the child did not report any such things, only that Jacob dissapered.