medical records show most of armistead's painkiller injections were administered by usc team doctor james taboney, a highly regarded medical sports physician and a big part of the usc program. but still under an ethical requirement to reveal the risks, according to professor arthur kaplan of new york university. >> even if you were the team physician, you still have to follow the standard of care and inform consent. you better be disclosing all risk. >> reporter: brian ross from abc news. outside his office, the doctor said he could not talk about the allegations in armistead's lawsuit. they say you never told him about the side effects. >> i can't comment on that, because it's a lawsuit and stuff. >> reporter: do you feel it's appropriate to use -- >> these are young, healthy people. we still use it. >> reporter: when we finally caught up with the usc coach lane kiffin, he told us he had no idea when or if it was used on his players or of its risks. >> well, if that was the case, i did not know that until you just told me that. if that is accurate information, i would want to know that. as i sai