they were pretty young children, perhaps they heard them and didn't answer if they were playing hide and seek or afraid of getting in trouble. I thought they said they probably crawed in the trunk through the back seat opening, I wonder why they didn't try and crawl back out. Too young, and said. It's so easy for young children to get into mischief when left alone.
I thought about that but that's a big fear, to stay in such a hot area.