The 1980s McMartin Preschool case was, and currently remains, the longest and most expensive criminal trial in American history. Seven teachers at the school were accused of abusing hundreds of students, sometimes as part of Satanic rituals.

Expert FBI profiler John Douglas shares how he turned the sophisticated and cruel tactics of murderer Larry Gene Bell against him.

In 2012, the Supreme Court's Miller v. Alabama verdict found that almost all juvenile offenders deserve a chance at release and must be resentenced.

In 2017, the investigation of a missing 20-year-old Indigenous woman from the Blackfeet Indian Reservation in Montana stalled, which resulted in it remaining unsolved today.

Was a dead woman found in Norway in 1970 a spy, a member of an international criminal organization or did she suffer from a mental illness?

Forensic psychologist Dr. Katherine Ramsland tells A&E about her over a decade-long correspondence with Rader.

A&E investigates attempts made by death-row inmates to donate their organs posthumously.

Since his arrest in 1980, the killer also known as the 'Times Square Torso Ripper' has spent his days at the New Jersey State Prison, where he has since confessed to additional murders.

The "Sexual Healing" singer was shot twice by his dad on April 1, 1984.

The non-profit Texas EquuSearch, which helps find missing persons, has sparked a renewed effort to find the remains of possible additional victims of the ‘Candy Man’ serial killer.

In January 1977, Gary Gilmore gained international attention for his choice to die by firing squad after being sentenced to death for the murder of two young Mormon men.

A&E looks at five pairs of infamous best friends who did everything together—including murder.

Since his incarceration in 2004, for the murders of 71 teenage girls and women, 'Green River Killer' Gary Ridgway has lived a life of isolation at Washington State Penitentiary.

DNA Doe Project's Margaret Press on how the discovery was made.

The 1995 murder of Maurizio Gucci, former heir to the Gucci fashion empire, led to the conviction of his ex-wife Patrizia Reggiani, and others, in a high-profile case that made headlines across the world.

A convicted sex offender lived across the street.

From teen victims Libby German and Abby Williams to Alonzo Brooks to the 'Jennings 8' and more, we look at some murder cases that investigators could use the public's help in solving.

Abdon Pallasch spoke with us about his reporting on R. Kelly and why it took nearly 30 years for the singer to be prosecuted.

Shi Yan, an assistant professor at Arizona State University's School of Criminology and Criminal Justice, spoke with A&E.

On January 13, 1992, the serial killer changed his plea from not guilty to guilty but insane, which removed the need for a criminal trial and forced the verdict to be based on the jury's decision of his mental state.

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.