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.

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.

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?

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.

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

The murder trials and appeals. Ted Bundy helped prepare his own defense, but would his amateur lawyering help him beat the rap or send him to the electric chair?

Ted Bundy maintains his innocence. As the clock wound down on his final death warrant, Ted Bundy made a last attempt to save his life. He began to talk. Were his confessions too late or a could this save him from the electric chair?

Jodi Arias is a small town waitress and aspiring photographer. Travis Alexander is a handsome, devout Mormon and successful businessman. Almost two years after their romance began, Travis was found brutally murdered in his shower at home.

Actor-musician David Cassidy ("The Partridge Family") experiences the pressures of fame as a teen idol in the 1970s. In the end, his death is surrounded by mystery, leaving his family, friends and fans with more questions than answers.

In an exclusive prison interview, Timothy McVeigh himself describes how events in his personal life - and in the ever-changing world around him - inspired him to take action against his fellow Americans.

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

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

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?

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?

In the winter of 1974, college-age women from the Pacific Northwest began to disappear seemingly without a trace.

While serving time for aggravated kidnapping in Utah and facing first degree murder charges in Colorado, Ted Bundy escaped not once but twice from authorities.

On April 19, 1995, Timothy McVeigh, a 26-year-old U.S. army veteran, detonated a 7,000 pound truck bomb outside the Alfred Murrah Federal Building in downtown Oklahoma City, claiming the lives of 168 innocent people.

On April 15th, 2013, two bombs explode during the iconic Boston Marathon, killing three spectators and injuring hundreds of others. In a race against time, investigators, using state-of-the-art technology, circulate images to the public of the two suspects dubbed "black hat" and "white hat."

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?

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?

Uncovering Prince's secret struggles from his earlier years to the final days leading up to his shocking death.

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.