Huh. You would have thought they would have called out.
They were probably unconscious by then.
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.