This man was not committed to death row because of one doctor. He was found guilty because multiple people in his life testified he had a history of violently shaking and screaming at a child for crying.
The doctors failed to diagnose the infant with severe pneumonia and prescribed it medications that are no longer considered safe for children. This seems like plenty of doubt to not convict him.
You know the issue with that claim? It would have shown up in autopsy. There would still be inflammation in the lungs.
The child had breathing problems because of SBS. SBS can pinch off the airway.
This is a kid that was repeatedly in a hospital. Not for a diagnosed issue such as Asthma but because SBS damage kept occuring because Roberson kept shaking the child hard enough for her to pass out on multiple occasions.