Dolly Oesterreich orchestrated one of the most bizarre secrets in true-crime history by hiding her secret lover Otto Sanhuber in her attic for over a decade and helping cover up her husband Fred's murder.

1976, three kidnappers hijacked a school bus in Chowchilla, California. They buried the hostages in a ventilated moving van inside a Livermore rock quarry for a 5 million dollar ransom. After 16 hours, the group successfully dug their way out, leading to the captors' swift capture and conviction.

David Carl Kinney fatally shot his best friend and secret romantic partner, Brad McGarry, twice inside McGarry’s West Bellaire, Ohio home. To conceal their long-term homosexual affair.

1996, during a midnight dinner break on the Halifax, Nova Scotia set, an unknown culprit spiked the cast and crew's clam chowder with some substance. Director James Cameron was among the roughly 80 people hospitalized.

19-year-old Texas Tech University student Hollis Daniels III was taken into custody by campus police following a routine student welfare check. While being processed and left temporarily un-handcuffed at the campus police headquarters, Daniels drew a stolen handgun he had hidden in his pants and fatally shot Texas Tech Police Officer Floyd East Jr.

In 2007, prominent Utah doctor and former LDS bishop Dr. Martin MacNeill pressured his wife of nearly 30 years, Michele MacNeill, into getting a facelift. Just days after the procedure, he intentionally overmedicated her with a lethal cocktail of prescription drugs and left her to drown in their bathtub so that he could freely pursue a relationship with his mistress, Gypsy Willis.

Shannon Guess Richardson, an actress with minor roles in television shows like The Walking Dead, was sentenced to 18 years in federal prison in 2014 for mailing letters laced with poison to Barack Obama and Michael Bloomberg.

Swept overboard in the Gulf of Tonkin in 1967, U.S. Navy sailor Doug Hegdahl was captured and sent to the infamous Hoa Lo Prison. Feigning illiteracy and ignorance, he earned the nickname "The Incredibly Stupid One", granting him the freedom to sabotage enemy trucks and memorize the names and details of 256 POWs using the tune of "Old MacDonald Had a Farm".