Author Casey Sherman speaks about Tony Costa's murderous rampage.

Scientists are promoting and developing guidelines and standards within the forensic science industry to help combat bias in results.

The 'Unabomber' killed 3 people and injured more than 20 others during his mail-bombing campaign. What's his life in prison like today?

The serial killer brought fear to the University of Florida and surrounding area after murdering five young women over the course of three days in 1990.

About two weeks before Brian Laundrie strangled his 22-year-old fiancé Gabby Petito to death in late August 2021, the couple had an encounter with law enforcement in Moab, Utah. Could different decisions by the police officers have prevented Petito's death?

In swatting, emergency services are told of a threat, such as a shooting, bomb or hostage situation, at a specific address. Unaware that the call is a hoax, police or SWAT teams mobilize in response--the inspiration for the name 'swatting.'

We speak with author Dawn Keetley to gain insights into the life and crimes of Jesse Pomeroy, the pre-teen who tortured and killed children around Boston in the early 1870s.

We take a look at what sextortion is, how this crime can affect young victims and what happens if the perpetrator's demands are not met.

Legal experts offer a look at what unfolds at courts after dark.

What makes a murderer choose one killing method over another? We spoke with experts to gain insight into murder weapon preferences and what they mean.

How can changes in legislation, law enforcement training and additional support better aid victims who are stalked with technology?

In response to Sarah Everard's murder by an off-duty police officer, Wayne Couzens, the #TextMeWhenYouGetHome hashtag went viral to demand accountability from male perpetrators of violent acts against women.

Serial killer Lonnie David Franklin was arrested in 2010 due to a recovered DNA sample after murdering over the course of about 25 years. Learn about his victims.

In 1996 at Shenandoah National Park, Lollie Winans and Julie Williams were murdered. The case remains unsolved. Journalist Kathryn Miles believes investigators focused on the wrong man.

We spoke to a victim of Alex Christopher Ewing, also known as the Hammer Killer, about the struggles she's faced since the loss of her family.

A family friend, who was her husband's ex-lover, was acquitted.

Dan and Ron Lafferty's obsession with a fundamentalist fringe group of the Latter-day Saints called the School of Prophets led them to murder their progressive sister-in-law Brenda and her child.

When a North Carolina woman's body was discovered in a pool of blood at the foot of stairs in her home, her husband, Michael Peterson, became the prime suspect in her murder. But what really happened to her has been the subject of debate.

A detective's keen eye for details results in closure for Janie Landers' family that had waited over three decades for answers.

Paul Holes, a forensic scientist who helped catch the Golden State Killer, talks about the life of a homicide investigator.

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.