Decode the mysteries behind the Heaven's Gate cult and examine the secrets of its compelling leader, Marshall Applewhite.

A workplace romance turns fatal for a Baton Rouge teacher-of-the-year mum. Could a three-year-old eyewitness help crack the case?

On the heels of Sherri Papini pleading guilty and receiving a prison sentence for her fabricated kidnapping tale to federal agents and mail fraud, 20/20 features interviews with the investigators.

Sherri Papini went missing while out for a jog in November 2016 in the northern Californian town of Redding, It would take over six years to find out what really happened to her.

Texan woman Wendi Mae Davidson is serving a life sentence for the gruesome murder of her husband 17 years ago. She maintains her innocence to this day, despite admitting she stabbed her him.

Robert Durst was the millionaire murderer who was linked to a series of slayings across America, including his wife and best friend. We have the exclusive interview with the man who put him behind bars.

Julie Rea was wrongfully convicted of her son's murder. 20/20 reports on the case, the events of the tragic night, Rea's wrongful conviction and the true killer's startling confession about the crime.

A family discusses their seemingly perfect husband and father's deadly secret.

Two years ago, the story of Lori Vallow gripped the world. After falling in love with doomsday prepper/author Chad Daybell, her children were found buried in his backyard. Now, they both face charges.

Imagine being woken by police to be told not only that your husband is engaged to someone else, but that he is being arrested for that woman's murder. 20/20 looks at the shocking case of James Addie.

Part 2 of 2: Children from the Turpin family who were held captive in their LA home discuss how they endured harrowing conditions including starvation & violence and reveal details about their rescue.

Part 1 of 2: 20/20 presents an investigation into the California "House of Horrors" where 13 siblings were found held captive by their parents.

Part 1 of 2: 20/20 investigates the tragic murder of social media influencer Gabby Petito, featuring interviews with Gabby's parents, private investigator Jason Jensen & retired special forces veteran Mykel Hawke.