detectives who were asked about it pled the fifth. >> we have a lady on death row in texas. who in the course of the litigation, the only three people who took the fifth amendment were the two lead detectives and the court reporter. >> the question for cooper was why hadn't mulder shown the second videotape to the jury. >> i don't know why they didn't show the tape. he said put it in if you want it but they never put that portion of the tape in. >> i think it was a huge mistake not to show the jury this memorial service. i think it would effectively nullified any impact the silly string video had. >> as he continued to build darlie's appeal, cooper was confronted with another question, why had mulder never raised darlie's husband darin as a possible suspect. >> let's be practical about this. there are two adults in this