A beloved teacher and former beauty queen in a small Georgia town. Despite years of speculation and numerous leads that went nowhere, the case remained unsolved until 2017 when a woman came forward with information implicating two former students, Ryan Duke and Bo Dukes.

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On July 26, 1999, Beatriz Vidaror suddenly passed away after being hospitalized for what initially appeared to be a simple case of food poisoning. Her unexpected death occurred at the Eich Clinic in Luxembourg, where her husband, Charles Missenard, worked as a laboratory director.

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D.B. Cooper is the alias of an unidentified man who hijacked a Northwest Orient Airlines flight on November 24, 1971. He boarded the plane in Portland, Oregon, and, during the flight to Seattle, passed a note to a flight attendant claiming he had a bomb. He then demanded $200,000 in ransom, four parachutes, and a fuel truck standing by in Seattle.

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On October 28, 2017, Alexia Daval, a 29-year-old banker, was reported missing by her husband, Jonathann Daval, who claimed she had gone for a jog and never returned. Two days later, Alexia's partially burnt body was discovered in a wooded area near Gray-la-Ville, Haute-Saône.

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In November 1992, 21-year-old Luxembourgish student Christiane Heiser was found brutally murdered in her apartment on the Université libre de Bruxelles (ULB) campus in Brussels. Despite extensive investigations, her case remains unsolved over three decades later.

Background

Christiane had recently returned from a year in the United States and commenced her studies in economic sciences at ULB in October 1992. She resided in room 138 on the first floor of Campus Irena V, a building rented by the Luxembourgish government for its students. Described as intelligent and reserved, she was focused on her studies and had been living on campus for about a month.

The Crime

On the night of November 10, 1992, while many students attended a party, Christiane chose to stay in her room to study. Her absence over the following days raised concerns among acquaintances, leading campus authorities to check on her. On November 12, police and firefighters discovered her apartment locked. Upon entry, they found pools of blood in the living area and her body in the bathroom, which had been locked from the inside. She had suffered multiple stab wounds, and a plastic bag was secured over her head with an electrical cable around her neck. Notably, the initials "CH" were carved into her body.

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62-year-old Helen Fiona Torbet, known as Fiona to her friends, was one of Scotland's foremost experts on its hills and mountains. On July 7, 1993, she went missing while on a walking holiday around Inverinate, a small village on the north shore of Loch Duich, located in Kyle of Lochalsh in the Western Highlands of Scotland near Kintai

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The Favoriten Girl Murders refer to a series of tragic crimes that occurred between 1988 and 1990 in the Favoriten district of Vienna, Austria. The victims were three young females:

• Alexandra Schriefl: A 20-year-old woman murdered in 1988.

• Christina Beranek: A 10-year-old girl killed in 1989.

• Nicole Strau: An 8-year-old girl murdered in 1990.

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Micaela "Mickey" Costanzo was a bright and beloved high school student in West Wendover, Nevada. Known for her athleticism and leadership, she was deeply connected to her family and community. One day in March 2011, she vanished after leaving school, sparking a frantic search effort. The case unfolded in a small town, revealing unexpected twists and a tragic story that left a lasting impact on those who knew her.

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The murder of Franz Pommerelle in 1906 stands as one of Luxembourg's most chilling criminal cases. Franz, a young man, was discovered lifeless in the picturesque Petrusse Valley. His right cheek bore dried blood, his skin appeared pale with a bluish tint, and his body lay supine with arms crossed beneath his torso, head facing downstream. A deep gash across his neck indicated a brutal slaying.

This incident shocked the nation, prompting widespread speculation about the identity of Franz's murderer.

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On November 1, 2007, Meredith Kercher, a 21-year-old British exchange student, was found murdered in her apartment in Perugia, Italy. She had been sexually assaulted and fatally stabbed.

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