Dr. Marissa Harrison, an evolutionary psychologist and author, speaks to us about her research on female serial killers and how she was impacted by victims' stories.

In January 2021, a man crashed into Lawrence Leonarduzzi, a flagger directing traffic at a work site in Iron County, Michigan, causing his death. But was it a crime or an accident?

Journalist and author Jeff Guinn on what can be learned from David Koresh and the Waco siege and how an FBI coverup continues to stoke the fires of government distrust three decades later.

More than 22 years after the murder of Keith Jones, a veteran Marine, his friend, Michelle Ashley, was charged with his murder. But was the real killer—or killers—caught?

After a Georgia man's murder, detective John Dawes promised the victim's wife he would solve the cold case. He didn't give up until he did.

Sex trafficking has evolved in the 21st century to focus heavily on social media and financial mobile applications. And despite efforts to stop it, it's increasing globally.

Gacy's mental state at the time of his crimes was questioned.

After 6-year-old William DaShawn Hamilton was found murdered in Georgia in 1999, it took 23 years to identify him and solve the case. We speak with those who never forgot about the case and pushed for justice.

We speak with experts about how conditions, like environment and temperature, affect forensic evidence when a body goes undiscovered for long periods of time.

Newlywed Lisa Techel, 23, was pregnant and asleep in bed in her Iowa home when she was shot to death by her husband, Seth, in May 2012.

The romance author murdered her husband Daniel Brophy in 2018.

Detective John Dawes speaks with us about the difference between solving active and cold cases.

Psychological autopsies, performed by forensic psychologists, are used to try to resolve cases where a murder may be mistaken for a suicide.

After Diane Staudte's husband and son died, and her daughter was hospitalized, an investigation showed she, and her favorite daughter, Rachel, were responsible for their deaths.

The reign of the bodybuilding world's most famous couple, Sally and Ray McNeil, ended after Sally murdered Ray with a shotgun in 1995.

From German nurse Niels Högel to U.K. doctor Harold Shipman to American nurse Charles Cullen, some serial killers target their patients.

Amish men are rarely prosecuted and jailed for sexual abuse against children. What's being done to expose these crimes?

We speak with Deborah Marion, mother of murdered NBA star Lorenzen Wright and Darren Goods, a lead investigator in Wright's homicide case.

The murder of a Chinese woman by her American husband in Columbia, Missouri was a long and painful case for police investigators, attorneys and, most of all, her parents.

An Airman who grew up in a Mennonite family came to resent the faith so much, he murdered a young Mennonite woman.

The mystery of the Zodiac Killer still enthralls the public.

Blanco made it to the top of the drug trade in the 70s and 80s.

Ramirez terrorized California during the 1980s.

In the panoply of American killers, Gary Ridgway stands out.

Gein was notorious for his fascination with women’s body parts.

Letourneau's affair with her student stunned America in 1997.

The case of Hae Min Lee’s murder captivated the world.

Laci Peterson vanished in 2002—Scott was later convicted.

Broderick fired five shots at her ex-husband before fleeing.

David Berkowitz’s 1977 arrest ended a year of fear in NYC.

The 1969 Manson murders marked the dark side of the ’60s.

A fashion icon’s murder capped Cunanan’s killing spree.

Hernandez’s case raised questions far beyond football.

The Murdaugh murders exposed a web of deceit and financial crime.

Caylee Anthony’s disappearance shocked the nation in 2008.