In Scott Kimball, the FBI thought it had found a high-value informant who could help solve big cases. What it got instead was lies, betrayal, and murder.

She escaped a crazed psychopath at 16. Decades later, as the BTK serial killer terrorizes Wichita, she has to run for her life again. The identity of her tormentor is too chilling to believe.

How history forgot Felipe and Vivián Espinosa, two of the American West’s most brutal killers—and the complicated story behind their murderous rampage.

Last September, law enforcement officers were confounded by a murderer targeting prostitutes along the border. As the investigation intensified, they discovered that the killer had been hiding in plain sight.

Joseph James DeAngelo Jr., known as the Golden State Killer, is alleged to have murdered 13 people in California during the 1970s and 1980s. He also raped 50 women. He’ll stand trial for the murders only.

The life of one of America’s bloodiest hitmen.

On H.H. Holmes “an old hand at corpse manipulation and insurance fraud,” who built a house of death in 1890s Chicago.

The search for a woman’s true identity and the unmasking of a serial killer.

With the 428th pick in the 1974 NFL draft, the Green Bay Packers selected…one of the most violent killers in U.S. history.

In the late 1990s, a serial killer found his victims in Yosemite National Park.

How America’s first serial killer terrorized the city of Austin on Christmas Eve, 1885.

The story of H.H. Holmes, America’s first serial killer.

On “Night Stalker” Richard Ramirez,who terrorized Los Angeles and San Francisco through a string of over 30 home invasion murders starting in 1984 and ending when he was recognized and apprehended by an angry mob.

A little after 9 a.m. on Sept. 15, 1990, the owner of a steel-products company pulled up to her office in Vinegar Hill, near the Brooklyn Navy Yard, and spotted a black garbage bag sitting on the sidewalk out front. She parked her car and went to move the bag when she noticed it leaking blood. The woman called 911. Within the hour, Ken Whelan, a homicide detective from the 84th Precinct, peered into the bag. It was full of human body parts.

Using his good looks and charm to lure over young women into his VW, Bundy terrorized the Pacific Northwest and then Utah, leaving over 30 corpses in desolate forest gravesite clusters. After being caught in Colorado, he escaped twice, the second time fleeing to Florida by train and going on a murderous rampage.

The coldest of cases: During 1884-85, seven women and one man were brutally murdered in Austin, Texas.