Children will wander off if given half a chance. My front door is locked and I carry my keys in my pocket not as habit, as I worked into the Hotel Industry, but I know my child will shoot straight out the door which my child has done a couple times a while back.
Across the road a few years ago was a family ( They moved, not because I am The Phantom Of The Opera opposite their house) but the local Government decreed your children had to attend the local school in your suburb)
Any way about three times I saw the young boy(age four) sneak out the front door touch the curb with his feet waited a few minutes and dashed back inside, without his Mother knowing.
I can see William going to the road curb and back to the house.
On the third time, I called out to him if he did again I would tell his parents. He never did it again
I told the neighbours next door she kept a look out as well. She even keeps an eye out even for my child/ other children just in case.
Foster Father answered truthfully, knowing his Foster Children also as he would remember what he did as a boy, given half the chance William would wander off, but FM and FFG were watching Lindsay and William had only pop inside for couple minutes.
So William knew he was being watched thought he was safe maybe just to walk to the curb and back.
Sometimes we all make a split desision like William's Foster Family,who saw FG home and the street is quiet and safe, no cars etc.
( Ourselves as parents watching the children,look all kids playing outside together, keeping each other busy, I just make a quick call of nature or cup of Tea.
Suddenly there is yelling one of the children had a accident...You have to explain where you were and why.)
Even in area I live nearly two years, a Mum was preparing Dinner, glancing out the window as her three kids were playing hide and seek in the Front yard, she was getting something from the cupboard when she heard the teenage son yelling from side of the house running to front yard, she looked out the window to see a man carrying her youngest child under the age of five. She dashed outside, but due to the teenager coming to his sibling aid the man threw the young child down and took off in a car. For over ten years the children had played in the front yard safety, parents believed that too.
The children no longer play out front yard. That family was lucky.
But William's family are still trying to find their missing boy.
William Foster Family is worse case