Good point. Normal procedure would be for someone to call 911, and then maybe go to the scene to see what was found.
But if DrewP didn't know that something was up, wouldn't your first impulse (as a police officer) be to check in with LE to see if there were any reports of KS being involved in an accident somewhere? Or that maybe some of her family took seriously ill or was injured and that she may have been at the hospital with them and forgot to call him? After all, calling about the boys in that situation may not have been a top priority as the boys were with their father.
But DrewP didn't address any of those issues, he went right from she was unavailable to recieve the boys...... to calling a locksmith.