As with lots of things: The details matter. Leaving a kid in a car shouldn't be an offense. Not returning ~soon~ might be and might be a reason to call the cops/force the car open.
Parents can damage/kill their kids in uncountable ways. Most don't and really try to avoid that. Trying to watch over their shoulder isn't 'Good citizenship', it's crazy and a witch hunt. You start to be labeled as child abuser if your kid is crying like hell (toothing maybe, or really interested in strawberries that you don't like to hand out - but the people around you don't understand that, don't have the slightest bit of clue about the situation. More often than not, OTHER parents are worse than the rest).
Give it a rest. The scenario you describe sounds terrible. But it's not relevant to the situation at hand. The person in the article describes that she checked the temperature, knew how long it'd take (even had a deadline on multiple levels, not only 'Today I do not want to choke my kid in the car' - she even planned to take a flight before the kid could have taken any damage. More seriously, a parent decided something for her kid. Something she does gazillion times a day. People might object to a number of her decisions and this particular one got her in trouble? Someone 'snitched'? Sad. The system failed.
I understand:
- someone was worried, called the cops
- cops reacted (yay!)
But:
- before cops arrived, kid was gone and obviously safe with the parent
- charges were pressed, just because?
One word: Insane.
I'm a father of two, both younger than the kid in the car.
edit: One of the worst typos I made so far.