I think as soon as they dropped the child abuse charge from 1st to 2nd degree that they had enough to proceed.
Yes, I agree. With the charges as they are written, you can even have a lawyer fully convince the judge that Harris legitimately forgot Cooper was in the back of the car, and he loved that child with his whole heart and never ever would have intended him harm and now his life is ruined by guilt.
But the way the charges are written, this case can still proceed with the charges as they are.
I do wonder about the possibility of a jury pardon in a case like that, though.