to know that had been plotted behind my back hurt. hurt. >> did it make you think that maybe he could have been behind this? >> it made me have a lot of questions. >> while any case against darin would have been purely circumstantial, that didn't explain why doug mulder hadn't fended off some of the circumstantial evidence against darlie who was facing death row. >> the biggest failure was the failure to use forensic testing. >> i think it was probably the strongest forensic evidence that the state had. >> the state contended that fibers found on a bread knife in the kitchen matched the slashed window screen. >> they didn't do any testing to