The more I think about it the less I think BS has abducted William. His MO is to assault children he is known to and has easy access to. Abducting a child not known to him in broad daylight is a HUGE leap for him. I still feel that, sadly, William has some how fallen down a hole or crawled into a drain and become trapped. The fact that the dogs found no scent of him outside of the property seems to indicate he never actually left the property. The police had no choice but to arrest BS for his past crimes (and rightly so, may he rot in gaol) but I don't think they will arrest him for William's abduction.