Francisco Alvarado

Hilma Witte wanted her husband and stepmother-in-law gone.

A state law passed in 2016 helped release the one-time fugitive.

Christian Nielsen has never given a reason for the spree killings.

Cindy Wanner was abducted and murdered in November 1991.

The story he told about Doroth Donovon's killing initially seemed bizarre.

Kaitlin Armstrong fatally shot the pro cyclist in May 2022.

DNA advances have lead to renewed hope in the 10-year-old's case.

How the mafioso formed a unique bond with an FBI agent.

Amber Dubois and Chelsea King were killed by the same man.

Libby Adame performed black-market cosmetic procedures.

A single mom's disappearance led to a web of deceit.

Four people were found murdered in the town of Farmville, Va.

Gein's upbringing might have influenced his gruesome behavior.

The "Killer Clown" killed at least 33 young men and boys.

Explaining why criminals receive multiple life sentences.

In 2010, Lawrence Ray, a 50-year-old ex-con, formed a sex cult at his daughter's dorm room at Sarah Lawrence College in New York and humiliated, tortured and trafficked members for his pleasure and monetary gain.

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.

On November 13, 1974, DeFeo killed his family in Amityville. Although he confessed, his motives remain unclear.

Joseph Augustus Zarelli was found in a cardboard box in 1957.

Authorities say Allen incriminated himself 61 times.

Judges can find anyone in contempt if they are disrespectful.

In 2010 the Internet provocateur launched IsAnyoneUp.com, the first 'revenge porn' website, where users could post intimate images of other people without their consent. Where is Hunter Moore now?

Jana Monroe, one of the FBI's first female agents with the Behavioral Science Unit, on what it was like interviewing serial killers.

During the 1990s and early 2000s, more than 30 women were targeted by serial killers, including Derrick Todd Lee, in the Baton Rouge area.

Was bullying during his early years to blame for Joel Rifkin becoming one of the most prolific serial killers in New York history?

A look at milestones in police use of DNA evidence.

In 2006, four sex workers were found dumped in a ditch near Atlantic City's border. The serial killer has yet to be identified.

Law enforcement agencies are ramping up use of artificial intelligence to help solve crimes, but experts warn the technology is still in its infancy and should only be used to augment traditional investigative methods.

The British-American anti-virus software pioneer was found hanging in his cell in a Spanish prison hours after a court ruled that he would need to return to the U.S. to face tax evasion charges. But his inner circle has doubts about the manner of his death.

In 2003, Steven Mack, a homicide detective with the Huntington Beach Police Department, took a leading role in retrying a twice-overturned murder case against Rodney Alcala. His efforts led to the uncovering of a prolific serial killer.

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

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

Two years after the Jonestown Massacre, ex-members of the cult, Al, Jeannie and Daphene Mills, were murdered. The killer was never caught.

Detective Lindsey Wade on the experience of solving the 1986 cold case murder of 13-year-old Jennifer Bastian from Tacoma, Washington.

After Tom Kolman's mysterious death, Kingston, New York dentist Gilberto Nunez, who pretended he was with the CIA and was having an affair with Kolman's wife, was tried for his murder.

Millionaire Jim Sullivan's marriage to Black socialite Lita McClinton ended with Lita’s murder. Deb Miller Landau book delves into Lita's impact on her community, Jim’s fall, and racial dynamics.