When an 11-year-old Colorado Springs boy is reported missing, local police initially classify him as a runaway.

It's been more than two weeks since an 11-year-old boy went missing in Colorado Springs. As the investigation grinds on, the FBI recruits his father (an Army National Guard captain) to zero in on a suspect in the desperate hope that he'll be found.

When University of Illinois student Yingying Zhang vanishes from campus, the FBI launches a frantic search to find her.

A man takes a rabbi and three congregants hostage at a synagogue in Colleyville, Texas.

Mob boss Paul Castellano is gunned down in broad daylight. The FBI believe they know who's responsible; His successor John Gotti.

As boss of the Gambino family, John Gotti has beaten every case the government has thrown at him. The "Teflon Don" seems untouchable but Gotti's hubris may play to the FBI's advantage.

When a woman is found dead in her own home, detectives come upon a curious clue; The killer stuck around to make himself a meal.

A bomber seems to be targeting Austin's minority community. Three bombs kill two men and wound two women in 10 days.

With the Austin bomber changing his targets, the body count rises. One bomb explodes in a Fedex sorting facility but another is found at Fedex before it goes off.

For the first time ever, LisaMarie Freitas and Todd Heflin share their harrowing experience guarding the FBI Field Office during Hurricane Katrina.