Grieving grandfather Chuck Cox told TODAY Friday morning that he was unaware son-in-law Josh Powell had been investigated for having animated images of incestuous sex between parent and child on his computer two years ago and if he had known, it might have changed the course of the tragic events that led Powell to kill himself and Cox's two young grandsons.

Speaking with Lester Holt just after TODAY aired a report on the pornography investigation, Cox said it was the first time hed heard about it. At a court hearing last week, Powell was ordered to undergo a psychosexual evaluation, but the Cox family and its attorneys were not aware of the root cause.

Click here for full transcript and interview video.