His foster mother tells investigators as she drove around looking for William, she saw a large truck coming down the road and pulled over to let it pass.
"It was a semi trailer coming down the road really fast. And he thought I pulled over, because he acknowledged me by saying thanks for pulling over. But I pulled over 'cause I've just got my head out the window, you know, looking for William," she said.
"And then I drive really slow on Moore, and I get to the Riding School and I just think, he's not here.
"And I just drive out and I think, he's not here. And then I bring the car back up. And I just run out and I look for him again."
Desperate search for William captured
It seems that she may have driven into the driving school.