The autopsy did not show this. But why worry about medical science, I mean, you have a "feeling" it happened and so that is enough for you.
1) When Terri was examined by a doctor after her "accident" that left here brain-damaged, the doctor said she had an unusually stiff neck and the only time he had seen this before was with a patient who had been the victim of an attempted strangulation. Terri was also found by the paramedics face-down on the floor with her hands clenched up paround her neck, as though she was trying to fight off a strangulation.
2) When Terri was in rehab after the "accident" she was crying out as though she was in pain and her doctors then did a bone scan to determine if she had any broken bones. The results of this bone scan have been posted several times on this website and Hannity has discussed it on his show. The doctor who performed the bone scan wrote that "the patient has had trauma. There is evidence of healed fractures in several places." He went on to write about all the places where she had recently healed fractures, including in her back. So it looks like she took a real beating at some time not long before or during her "accident."
From now on, I want you to not jump to conclusions and pass judgment on people on this website when you are not well informed yourself.