From the report, there was no trauma to the internal tissues of the neck.
” NECK: Layer by layer dissection of the anterior strap muscles of the neck discloses no areas of contusion or hemorrhage within the musculature. The thyroid cartilage and hyoid bone are intact. The larynx is lined by intact mucosa. The thyroid is symmetric and red-brown, without cystic or nodular change. The tongue is free of bite marks, hemorrhage, or other injuries.
The cervical spinal column is palpably stable and free of
hemorrhage.”
I read that. While the report said there was no pneumonia, it seems there was fluid in the air sacs.