Some snippets:
Two U.S. officials with knowledge of the Army investigation said Lynch was mistreated by her captors. They would not elaborate.
U.S. military sources believe most if not all the fractures could have been caused by extreme compression during her vehicle accident.
Khafaji(Mahdi Khafaji, an orthopedic surgeon) said that Lynch's wounds made him suspicious. The fractures were on both sides of her body, for example, and "if they all came from a car accident, there was no glass in her wounds, no lacerations or deep bruises."
Khafaji said "maybe a car accident or maybe they broke her bones with rifle butts or by stomping on her legs. I don't know. They know and Jessica knows. I can only guess."
This is a good article and summarizes the actions of the other personel involved at the battle.
Again, it should not matter one bit to you how she received her injuries. Accuracy about something which you feel passionately should matter.