Brain swelling was completely consistent with spinal cord damage, as was explained in the autopsy. I don't believe the doctor would be making claims that brain swelling was not consistent with visible injuries had he known about extensive spinal cord damage.
bbm. Brain swelling was mentioned on the search warrant and can not be diagnosed without testing. The child suffered blunt force trauma to the head. You are making an assumption that the brain swelling was caused by a spinal cord injury.
I doubt an insider would claim that DS believed the child was suffocated unless DS had a little more to go on than a doctor's "visual" inspection.
JMO