Karen calls cops on my wife for leaving kids in AC’d car

Wife (no pics) went into Winn Dixie for 3 minutes to get a single roll of aluminum foil. She left our boys (8 and 5) and our golden retriever (2) in the car with the AC running. She used remote start and took the keys with her. She didn’t want to bring them in because she was only getting 1 item and people look at you weird when you bring kids into the store during COVID.

When she got back to the car she was flagged down by a Karen who told her she just called the cops bc she is endangering our children by leaving them in the car unattended. Karen knows they could die from heat stroke because she “used to be a paramedic”. My wife the ICU nurse (again no pics) looks at Karen like she’s a tard and says “with the AC running?” Karen informed her that it is still against the law and she’ll be in big trouble when the cops show up. She told my wife “Don’t even think about driving off because I have your license number!”

A minute later the cop shows up and the first thing he does is roll his eyes and say “I hate stupid people.” He then proceeds to tell Karen how she’s an idiot and wasting everybody’s time and that my wife did nothing wrong and that if she had brought the kids in the store she’d probably bitch that my wife was exposing the kids to COVID. Defeated, Karen returns to her vehicle without apologizing for being a nosy dumbass and drives away.

How old does the OT think kids Should be to be left alone in an air conditioned car for a few minutes? Also, would my wife had been wrong to just tell Karen to frick off and drive home without waiting for the cops?