shepard: last month one of the operations went wrong. doctors at california s usc university medical center admit they gave the wrong kidney oa patient. a potentially deadly mistake. one that forced the hospital to shut down entire kidney transplant brahm. trace gallagher in los angeles tonight. how did this happen? well, two kidneys arrived at the hospital roughly the same time, shep. reportedly there was nothing wrong with the packaging or the labeling. the mixup apparently happened inside the hospital. now the system is supposed to be full proof. supposed to have the id number on the donor kidney and match the i.d. number of the patient. it s unclear exactly how that system failed, which is why they are investigating. but it s very lucky that both the donor kidney and the patient who got the wrong kidney had the