If the local news is to be believed, it was the Amber Alert which led to the vehicle being located. The alert may have been a hoax but it did help law enforcement officers even though the child was already dead.
I have a difficult time being nonjudgmental of people who kill children. I don't care what drugs you're on or what mental health issues you have on your plate. Murder is murder. I know that isn't very open minded; it's an emotional response.