She was saying something from a book written by someone else
Have you read the book? Matthews sure had not, which was extremely unprofessional of him. Did the book say the wound was self-inflicted? If it did, then why are people jumping on Malkin for saying what was in the book? Why was she being baggered to explain someone else's book in the first place? Would you like to be baggered by an asshole like Matthews about a book that you'd read maybe once or twice?
Eyewitness accounts indicate that Kerry was nicked by a fragment from a grenade that he'd fired too close to himself. If true, that's a self-inflicted wound. Period, end of story.