How the FBI used forensic evidence to confirm a suspect in the bedroom of 1993 kidnapping victim Polly Klaas.

Episode 1, Polly Klaas: Kidnapped

Factual

Real FBI cases are recounted through reenactments and interviews with law enforcement and forensic scientists.

Real FBI cases are recounted through reenactments and interviews with law enforcement...

The investigation into the rape and murder of 23-year old Robin Bishop on a Californian highway in 1982.

A man who hunted and killed outdoorsmen is caught when the FBI receives a tip leading to the murder weapon.

The cleanliness of a killer that led to evidence in sexual assault and murder of woman and her daughters.

After an 11-year search, one of the killers in the murder of a vacationing couple is arrested on the high seas.

The FBI investigates Vincent Gigante who feigned mental illness to avoid prosecution and then incarceration.

Florida Police investigate a serial killer in 1984 with evidence that links the victims and the killer.

Police and FBI agents investigate Caleb Hughes who abducted and murdered missing 5 year old Melissa Brannen.

This episode profiles The Unabomber who maimed and murdered people with mail bombs for two decades.

The FBI launched a full scale manhunt for mountain man Claude Dallas after he killed two game wardens.

The FBI investigates the 1993 truck bombing of the World Trade Center.

The FBI's investigation of the 1993 truck bombing led to the conviction of all terrorists in less than three years.

FBI agents obtain recordings of Gotti discussing his criminal enterprise and murders.