What is it with all these people passing out for naps?
Shouldn't they have looked to make sure the vehicle was empty of people, before they ever rolled the windows up in the first place?
I don't think kids died left in cars back in the 50's! Why is that? Because the windows were left open all the time? No...
And while we're at it we can form some new governmental regulatory commission to make sure that this doesn't happen again. And the agency can ensure that all of us with children under 5 retrofit our vehicles with this new technology. I'm being sarcastic and realize that you didn't propose a big government solution, but the problem is that every time you try to make something idiot-proof, someone comes along and makes a better idiot.
In fairness, I could see something like this happening, given the situation as described. The incidents of this type that make my blood boil involve cases such as the one where the "mother" left her child in the van while she played video poker or, the case cited earlier where the sailor locked her child in the car while on duty and "checked on him periodically". It's a crying shame that no matter how dumb some people may be, they always seem to figure out how to breed......