any involvement in the murder of his wife. he called his former housekeeper a liar. to prove it, he permitted investigators to search his house. >> they found these insurance policies under a mattress. and he said, you know, i didn't want you to find those. a little suspicious looking. i didn't want you to find them. >> the policies revealed something troubling. joe had recently increased the amount of his wife's life insurance from $200,000 to over $400,000. and on joe's desk at work, investigators found even more potential evidence. >> they came up with a bunch of floppy disks, those big 5.25 disks that we used to use. >> but just as the investigation was starting to take shape, joe's colleagues in the office of special investigations made a catastrophic blunder.