Residents of Gainesville, FL, are left horrified after five college students are found brutally murdered in August 1990. The FBI analyzes killer's psyche, unlocking the key to his personality before he kills again.

In October 2002, a small Missouri town is horrified when an 11-year-old boy vanishes without a trace. A second boy mysteriously disappears four years later. Can the FBI stop this predator before another child goes missing?

For more than a decade, a series of young women and one small child have disappeared from the Kansas City area. As authorities dig deeper, they discover a dark underworld of sadomasochistic crimes that shock the nation.

A night of fun at the 1996 Olympic Games ends in horror when a bomb explodes in Atlanta's Centennial Park. The FBI works around the clock to identify a suspect and track him down before he chooses his next target.

In January 1987 a young socialite is gunned down in her suburban Atlanta home. When authorities can't come up with any hard evidence linking anyone to the crime, the case goes cold -- until an unsuspected twist changes everything.

Fear grips a small Oregon community when a young girl vanishes on her way to school. The investigation stalls until a brutal crime leads local police and the FBI to the gruesome truth.

On August 10, 1999, a shooting at the North Granada Hills Jewish Community Center terrifies local residents. Investigators launch an all-out manhunt in hopes of catching the gunman before he strikes again.

When a brutal mass murder shakes a rural Idaho town, the local sheriff's department and the FBI join forces to find the only two witnesses. They uncover a diabolical plot that astonishes even the most hardened investigators.

Terror strikes when three female hikers go missing. Fear escalates as a California town's history of abduction, murder and drugs are exposed. Law enforcement must unravel a tangled web of false leads before tragedy strikes again.

A federal judge and civil rights attorney are killed instantly when mail bombs are delivered to them. Two more bombs are found the same week. Rumors swirl that a hate group is responsible, but the truth may be more sinister.

When Sidney Reso leaves his house but never shows up at work, it soon becomes apparent he's being held for ransom. The FBI embarks on a maddening chase in hopes of catching the kidnappers and saving Reso's life.

Two teens discover hidden caches of weapons throughout the Pennsylvania countryside. It isn't long before an FBI agent connects the strange arsenal to a series of crimes that have baffled the bureau for over 20 years.

Police are perplexed by the criminal savvy of an assailant in a series of violent late night assaults in Bloomington, IL. Investigators are shaken to the core when the perpetrator's true identity comes to light.