Saint Patrick's Day 1990, robbers stormed Boston's Gardner Museum, making off with 13 priceless artworks, never to be recovered. Valued at half a billion dollars, the whereabouts of the missing pieces remain a mystery.

Lyle Menendez speaks from behind bars to Chris Cuomo, more than 25 years after he and his brother Erik were convicted of first degree murder.

Authorities search for missing mother of two, Susan Powell, in every nook and cranny of the desert in Western Utah while her friends and family wait for a break in the case. Her husband Josh is named a person of interest as suspicion about his involvement in her disappearance grows. He and his father wage a counter-attack and a war between Susan and Josh's families erupts in the glare of the public spotlight. Shocking revelations about Josh and his family come to light--evidence of violence, obsession and sexual perversion. The family drama leads up to a shocking and unimaginable conclusion.

Recent scientific advances have uncovered new secrets around the Titanic sinking, challenging previous notions about the ship's fate. This chapter continues to analyze the wreck and a recent underwater expedition that claimed more lives.

David Kaczynski, the brother of convicted Unabomber Ted Kaczynski, discusses the hunt that led to the capture of his infamous sibling.

An eight-month-old baby is fatally injured while in the care of a family's au pair, Louise Woodward. Was it child abuse or a tragic accident? Doctors suspect the former, a case of 'shaken impact syndrome,' and detectives arrest the infant's 19-year-old British nanny who cared for him in the hours and minutes before his demise. But, was the baby's death a case of intentional murder or a tragic accident that occurred under Woodward's watch?

In the dark hours of June 23, 1993, in Manassas, Virginia, a man lies fast asleep on his bed, while a woman looms over his prone body with a kitchen knife and proceeds to slice off his manhood. A stunning end to the broken marriage of Lorena and John Bobbitt, but what outrageous situation led two young people to a horrifying silent scream in the night?

The fateful Titanic shipwreck of 1912 intertwines with a recent underwater OceanGate voyage that cost more human lives. Interviews with historians, wreck analysts, and descendants of Titanic passengers shed light on both tragedies.

HLN highlights the shocking motive that turned these brothers into killers.

Deborah Jean Palfrey threatened to expose names on her client list and was found hanging on her mother's property.

The shocking killing of Reeva Steenkamp by Olympic superstar Oscar Pistorius on Valentine's Day 2013 shattered the illusion of a storybook romance between a celebrated Hollywood couple. Was it a terrible accident or a callous murder?

Susan Powell, a 28-year-old mother of two, goes missing in December of 2009. Her husband Josh claims to have taken their two young sons winter camping in the Utah desert and says he returned the next day to find her gone. Questioned by detectives, he doesn't behave like a concerned husband and his version of events doesn't match his son's. The mystery about where Susan's is deepens as more details about her marriage to Josh and their life behind closed doors emerge. Susan's family and friends do everything they can to find her while Josh insists that she ran out on him and their two little boys. The search for Susan Powell plays out on a national stage with everyone wondering: did she run off? Was she taken? Is Susan Powell dead or alive?

Aviation experts revisit the accident and share what exactly happened.

The chilling account of a man who survived his encounter with the notorious serial killer, who managed to evade police scrutiny for years.

In 2008, two-year-old Florida toddler, Caylee Anthony, vanishes. Her mother, Casey Anthony tells investigators Caylee has been kidnapped by her nanny, a woman Casey's family has never actually seen. But why?

George Michael's life as an international superstar comes to a mysterious and tragic end on Christmas Eve 2016. Family and fans are shocked by his sudden death. There are so many unanswered questions. Who was with Michael in those final hours? What happened the night he died? What did the coroner find was the actual cause of death?

A tale of murder, adultery, courtroom drama, and ultimately the death penalty. The story of Scott and Laci Peterson as told by those who lived it. Did Scott Peterson murder Laci?

On January 26th, 2020, Kobe Bryant's helicopter crashed, killing all people on board.

Revelations of what Michael Jackson's children and staff witnessed prior to his death and an investigation into the claims that Jackson took his own life.

Heath Ledger's death is examined.

It was the shocking affair that nearly toppled a Presidency. Bill Clinton and a 21 year old White House intern, Monica Lewinsky.

They were well-known and well-liked Dartmouth College professors. But on January 27th 2001, Half and Suzanne Zantop's incredible lives came to a shocking and unforeseeable end: found brutally murdered in their remote Hanover, New Hampshire home. The double killing quickly became national news. Who would commit such a heinous act, and more importantly, why? With few leads and few clues at the get-go, investigators were stumped. But some good old fashioned police work would lead detectives to a small town just across the border in Vermont--where they found an incredibly unexpected twist to this 'whodunit' mystery.

The aftermath of the investigation into the murder of JonBenet Ramsey.

In 2008, two-year-old Florida toddler, Caylee Anthony, vanishes. Her mother, Casey Anthony tells investigators Caylee has been kidnapped by her nanny, a woman Casey's family has never actually seen. But why?

The news of Bernie Madoff's arrest sent shockwaves around the world. His staggering crime affected thousands of victims, including charities, universities, celebrities and even Madoff's own family and friends. How did he do it? Why did he do it? Did he have any help? Investigators were about to unravel a scheme that went back decades and involved several loyal employees.