20/20

When a teenager suddenly vanishes while home on college break, his sister sifts through texts and social media to help crack the case.

When a surprising discovery in the backyard of a family home leads police to a husband and father's killer.

A famed real estate developer is murdered in his car by a remote-controlled pipe bomb.  Money, lies and revenge are the motivations, with evidence leading authorities on an international search to find the killers responsible.

A loving husband is found murdered in his home. Weeks later, his wife receives a chilling death threat on her doorstep. Investigators are left to unravel a web of dark secrets dating back decades.

When an insurance agent is murdered in his office, evidence points to a secret relationship — until new DNA technology helps authorities find the real killer.

A young couple is living a lavish lifestyle in rural West Virginia. When a con unravels their close-knit community, foul play leads to murder.  Authorities begin the hunt for a killer.

Gabby Petito's parents, in their first network TV interview together, share new information about their daughter's tragic disappearance and death, never-before-seen videos of her van life, and what her newly discovered text messages reveal.

A mother plunges from a cliff in a fatal fall while hiking on her anniversary. For the first time, her daughter speaks out.  

David Muir reports on "The Code Breakers." After two young women are murdered, their cases go cold for decades until police turn to cutting-edge forensic technology to catch the unlikely killers in both cases.

It's a harrowing tale of horror and homicide near Bozeman, Montana, when an intruder enters the home of three women and shoots two at close range, leaving one dead and the other barely clinging to life. Police quickly make an arrest but then release the person. Who could have committed this heinous crime? 

Matt Baker was a charismatic minister of a small church in Hewitt, Texas, just outside Waco. To his congregation, it looked like he had it all. Married to Kari, a Sunday school teacher, the couple seemed to have a happy and loving marriage and two young daughters, but when Kari was found dead, the carefully crafted facade Matt created soon started to unravel. 

A family drama unfolds when a multimillionaire father and his daughter both die under mysterious circumstances. A trail of greed and heartless brutality leads to an unlikely suspect.

An A-list celebrity hairstylist is found brutally murdered at his home. What begins as a suspected burglary slowly unravels into something far more personal. As the jury reaches a verdict in the high-profile murder case of the wife of celebrity hairstylist Fabio Sementilli, "20/20" is in the courtroom. 

When a lottery winner vanishes under mysterious circumstances, police begin an investigation, and there is no shortage of possible suspects.

Music, a bicycle and rose petals are clues to catch the killer of a South Carolina mom.

A mother's unrelenting crusade to find justice after her 21-year-old daughter is fatally stabbed in the hallway outside her apartment.

The woman who pled guilty to one of the most elaborate hoaxes ever now shares a different version of her story; her ex-husband speaks out after he and the world were conned.

When a married couple goes missing over a Fourth of July holiday weekend, a social media clue leads to a shocking discovery.

Bonnie Woodward was a 47-year-old mother of four who disappeared after her shift at a nursing home in Alton, Illinois. Known for her routine of checking in with loved ones, Bonnie's family became immediately concerned when they didn't hear from her. Soon after, her red truck was found abandoned, and multiple witnesses reported seeing Bonnie get into a silver Chevrolet with an unknown man. Suspicion fell on Bonnie's 18-year-old stepdaughter, Heather, who, in a bizarre twist of events, had recently run away from home, but she was cleared by authorities, and no solid leads emerged regarding Bonnie's whereabouts.

A killer puts a complex scheme into play after murdering a college student; a new investigation unearths the lengths taken to bury the truth.

New details uncovered about the crime, evidence and shocking guilty plea in the Idaho College murders.

When DNA evidence collected from an airport sting operation breaks open a cold murder case, authorities are led straight to a killer.

Exclusive interviews and new evidence in the shocking case of a Colorado dentist convicted of murdering his wife by poisoning her protein shakes.

A family is stalked, leading to the murder of a mom. Dramatic body camera video captures the unfolding investigation.

An entire family seemingly vanishes into thin air, igniting an investigation and search for answers.

Authorities race against time to find a kidnapped mom by tracing chilling 911 calls, including one from the victim herself.

After a dad of four vanishes, an investigation involving a body transporter and deputy coroner uncovers an outrageous murder plot.

Two key witnesses now say they lied about the murder of a young mother. Could this free a convicted killer?

Murder, power, and deception unravel in the Murdaugh family saga and the new Hulu miniseries exploring their downfall.

When a dedicated Army nurse disappears, her father begins his own desperate search. Investigators discover a complex web of jealousy, violence and a Marine harboring dark secrets.

A college student is murdered at home; investigators uncover evidence from a string of sexual assaults; a survivor who helped authorities catch the killer speaks out for the first time.

A beloved hairstylist vanishes without a trace, launching a multistate investigation that ultimately uncovers a chilling trail of deception.