calling trying to get information and like what s going on here. why are thing stalling? reporter: now the investigation has found that for 421 days, a year and two months, the fbi, olympic committee and gymnastics failed to act or even warn michigan university that he was sexually abusing athletes. there are profiles in cowardice because people put the other way. they put medals above people. reporter: the organization knowingly concealed reports. was this massive cover up at all levels of uag, usoc and even the fbi? there wit was a criminal covr up, remains to be proved but it was a cover up in spirit. reporter: in april of 2018,