at times appear to help the defense. we have our team of legal experts on board tonight. but first, martin savidge sets the stage. the injuries to the defendant s back of the head consistent with repeatedly being slammed into a concrete surface. reporter: the key reason zimmerman is given for shooting trayvon martin. how would you classify the injuries to the defendant s head? they were not life threatening. they were very insignificant. they did not require any sutures to be applied. so i would refer to them insignificant injuries. reporter: on cross-examination, the defense attorney implied she owed her job to the special prosecutor in the zimmerman case. and then walked her back from some of her findings. it s your position that it s consistent that george zimmerman may have only received as little as three did you call what term did you use, smashings or slammings into cement. i didn t use the word slamming. i got that from the re-enactment. what word