It happens occasionally in Canada, and I have never heard of the responsible adult getting off without being charged. The incident I read about most recently -- in Burlington, Ontario, on 23 May 2018 -- resulted in a charge of criminal negligence causing death. The blickifier isn't working right now, so here's the URL: https://www.cbc.ca/news/canada/hamilton/burlington-boy-hot-car-death-father-charged-1.4684696