Carrying this over :
That is not 100% true based on what I read on kidsandcars.org and the Washington post article. Some yes, the parents switched or a grandparent were watching the kids and forgot because they weren't use to having them but most cases the parent that does it everyday and was either distracted, stressed, on the phone or their normal routine was interrupted by an added stop or leaving at a different time. Most stories I read said because they are so use to dropping them they all thought they did despite the child still being in the car. They continue the day as if its any other day and have even recalled drop of scenarios that hadn't happened that day. That's why seeing a picture or a spouse asking how the child did at drop off during the day of accidents won't normally trigger an oh no feeling in them. Many have driven all the way back to the daycare to pick them up not realizing the poor babies are deceased in the back seat.
People keep saying "this happens all the time". I've said it but I want to rephrase. This happens... If there are 40 something cases of children passing in cars, not all left, its not all that common. Just tragic
*sad* Kind of jumps right off the page at you. "their normal routine was interrupted by an added stop"