Most people, sure. But RH wasn't exactly a responsible, conscientious person. I think he coukd have been so wrapped up in his thoughts he failed to register that Cooper was still in the car. I think he's a very selfish person and lacked a deep emotional connection with his son, so I think he could have just forgotten him.
His behaviour at the police station was just bizarre and I can see why it made LE feel sure he had killed his kid on purpose, but I think it's just as likely that he's just a selfish, self-centred person who killed Cooper completely by accident - and then immediately thought, Oh no, my life is over, why did this happen to me, everyone will hate me etc etc. He probably realised that LE expected to see more remorse and anguish from him, so he tried to fake it. Then he was trying to talk his way out of trouble by making himself out to be a super-responsible father - I watched videos on how to use the car seat, I was aware of the dangers of leaving kids in hot cars, I kissed him and told him I loved him every time I strapped him in just in case I died, this was my biggest fear - this was all RH trying to make himself sound good imo, trying to convince LE thay he is someone who is usually very conscientious about their child's safety and who doesn't deserve to be punished for one mistake. He's so clueless he doesn't realise that he is in big, big trouble this time. He probably did feel sad in his own way about Cooper dying but he would have soon moved on, and used his son's death to get sympathy and attention for himself. I don't think he's a sociopath, but I think he has very immature/ underdeveloped feelings of empathy and responsibility... He sure didn't react to his son's death in the way most parents would.
I think the state have got nothing that proves malice murder. Nothing at all. RH being a selfish, irresponsible man-child can explain everything that happened on that day just as well as premeditated murder can.
Also, I am still wondering about the text exchange between he and his wife the day before. She texted "Don't forget Cooper", and he replied "NEVER! Except for that one time." I do think it's possible RH had left Cooper in the car before, either by forgetting he was there - but then realising in time and rushing back to take him to daycare; or one purpose as other sleuths have hypothesised - leaving him in the car, clocking into work, and then sneaking out to take him to daycare. That would explain his incriminating comment on the veterinarian in the hot car video, and why he and his wife said it was their biggest fear...
All just :moo: