We are talking x3. The air in the trunk would have been poisonous rather quickly.
I don't know how the kids got in the trunk, or when the Mother realized they were gone in seconds, why she didn't hear them make a commotion in the trunk if she was outside looking for them?
I don't know the real length of time involved. But, any commotion made while they were still alive could have gone unheard before anyone knew they were missing.
On a boarder note, no one knows why some people die faster than others. If someone manages to live 7 hours in a carseat, it doesn't mean everyone will (I guess that's why some people have such faith in guardian angels and miracles.) These boys could have died rather quickly, especially if they increased their oxygen use with some panic.
Again, as I said earlier, there is nothing here that rules out what they are saying: accidental death. However, seeing how people do all sorts of wicked deeds, if, when further details are known, we find out the father was faking it, (when he had to be taken to the hospital after finding the bodies), I won't be shocked. Afterall, mothers drown the kids in tubs, and dads slash up their daughters and friends. I'm saying this because while I believe this was an accident, I'm not going to be upset with those who are cynical. Clinton may feel your pain, but I understand your cynicism...
Thank you..sw