I agree about the forgetting. I've recently done the opposite a number of times. Looked back in my car expecting to see my kids- then remembering I haven't taken them (they're a pre-teen and teens). But, I could see it happening the other way. I have ADD and can get distracted in mere seconds. I don't think I would ever forget my kids in a car, but I never say never.
But, I don't know how to explain them both looking up children dying in hot cars. I also can't imagine forgetting for an entire day- but then remembering to ask wife when she will be picking him up. And telling his friends he will be late for a movie but then telling LE he left early...And his and his wife's reactions.
Just too many little issues adding up to too many things one would have to overlook to find him innocent. JMO.
I don't find the short period of time between getting the the car with Cooper and forgetting that Cooper was in the car implausible. The length of time is not the only factor in forgetting: every time you forget something there is a moment when you remember and a moment later when you don't. I have walked from my living room to my kitchen to get something and in that time - maybe 2 or 3 seconds - completely forgotten what I went into the kitchen for.
That is reinforced for me by his interest in sexting. I can see his mind shifting from "had a nice breakfast with my boy" to "oh boy, nearly time for sexting." A terrible thing, but I don't think it would have to be deliberate.
What had convinced me he was guilty was that I believed the car would smell terrible by lunchtime and certainly by the time he got in and drove off at the end of the day. But reading about other situations where there was apparently not much noticeable smell has changed my mind about that. Perhaps it didn't smell as badly as I imagined it would, or at all.
I started out quite convinced that RH had deliberately killed his son. Now I am not so sure.
Tink
Sorry to quote myself, but I just noticed that in my post, I didn't put Tink's (above) post in, which is what I was referring to. I've been having trouble with quotes ever since the new WS format. Sorry...