. >> reene and brad brisbin owned a restaurant here in town. also worked at the local high school as a gym teacher. >> brad was fun loving. he enjoyed life. he loved to play practical jokes on people. >> brad was a very loyal, honest, trustworthy friend who would do anything, including giving you the shirt off his back, to help you. >> friday, november 9, 1990 started like most days until brad got a telephone call at work and left class unexpectedly. >> i actually met him in the hall. he had his jacket on. he was getting ready to leave. i asked him where he was going. he just said to help out a friend. they had brought in a substitute. he said he would see me at dinner later on that night. >> brad said he was going to belgrade about 90 miles away to pick up his friend larry moore who needed a ride. >> it was odd. he doesn't leave his teaching job for very much. yes, it was odd. >> what made it even more bizarre, brad never returned home. >> that's when we knew something -- i mean, we knew something was already wrong because brad hadn't come hom

occurred during brad brisbin's last moments alive. >> without it, we couldn't have proved that brad was even dead. he would still be a missing person >>> even before the attack on the world trade center in new york, intelligence agencies were watching a number of suspected terrorist cells throughout the united states. the fbi uncovered evidence of a terrible crime by some individuals using the cover of a st. louis grocery store. but it took a forensic autopsy and a tape to reveal the entire story. ♪ >>> 16-year-old tina isa was the kind of daughter most parents dream of. she was a high school athlete, popular, a straight a student and wanted to attend college and become an airline pilot. >> tina wanted to be american. tina wanted to be independent. she wanted to have a career. she wanted to travel. she wanted to be her own person. >> her mother and father, zein and maria isa, were immigrants from palestine and ran a small grocery store in downtown st. louis. >> like most immigrants, the palestinians went into the food business. that's a tradition in america. food service is one of the e