Carla Lenz, 17, disappeared on Nov. 12, 1986. Her brother-in-law, John R. Weber, nearly killed her sister two years later. During the search of the Weber property, police found a cassette tape in which Weber spoke in great detail about Carla’s horrific death. — Trigger Warning: This article contains graphic details of sexual assault and violence that some readers may find distressing. Gene and Caroline Lenz married on April 21, 1966, in Beresford, South Dakota, and ultimately had five children together — three sons and two daughters, Emily and Carla. …

Two men known to the teenager set her alight when she refused to become a sex worker for their prostitution ring. — Palmina Martinelli, 14, lived in Fasano, Italy, about 200 miles southeast of Naples, in the province of Brindisi, located in the heel of the boot of Italy and roughly 40,000 in population. Her father was unemployed, so her mother became the breadwinner, working as a cleaner to support their 11…

Shane Alan Coffman, 7, was found dead in a deep freezer in February 1996, months after suffering unspeakable abuse from his mother, Bertha Jean Coffman, and her boyfriend, Donald Lee Gilson. — Shane Alan Coffman would never attend third grade, get his driver’s license or graduate high school. He would never feel a mother’s loving embrace. The only thing he ever knew was abuse and neglect. His former teachers at Little Axe Elementary School in Norman, Oklahoma, described Shane as intelligent. Shane…

Stella Farrugia, 18, vanished from Henley Beach, South Australia, in October 1984, leaving behind her beloved dog and personal belongings. Her live-in boyfriend is one of two persons of interest in her case. However, he died in 2010. — Stella Mary Farrugia grew up in Sunshine, Victoria, Australia, the youngest child of Michael and Rose Farrugia, who had immigrated to Australia from Malta in the 1950s. Her conservative parents held traditional solid beliefs from their Maltese origins, which caused Stella to clash with them.

The young woman disappeared after her partner discovered she was seeing a man. — Christine Marie Markey, 22, grew up in Oneida, New York, and attended Morrisville State College to study business and real estate. Her parents owned rental properties, and she took a significant interest in them. Her family has described her as “full of life” and “very outgoing.” Christine resided with Tracy…

Tia Simone Rigg was brutally killed by her depraved uncle in 2010. — Trigger Warning: This article contains details of sexual assault and violence that some readers may find distressing. Tia Simone Rigg, 12, resided with her mother, Lynn Ahmed, and grandparents in Salford, Greater Manchester, United Kingdom. Tia attended Albion High School and had many friends. Her family and friends have described…

Marchelle Hansen, 23, disappeared on Nov. 12, 1988, from Phillips, Wisconsin. She was last seen at work, where she had shown sonogram pictures of her baby to coworkers. — Marchelle “Shelly” Hansen was born on Aug. 24, 1964*, the youngest of seven children. Shelly grew up in Random Lake, Wisconsin. At age 10, her parents divorced, and she moved with her mother, Joyce Hansen, to the northern part of the state.

Jason Matthew Lea, 9, disappeared on July 29, 1989, from Upland, California, after telling his grandfather he was going for a bicycle ride. Searchers found his nude, partially decomposed body a few days later. Four teenage male suspects were arrested but never charged in his murder. — Jason Matthew Lea, 9, was a third-grader at Baldy View Elementary School in Upland, California. Originally from Texas, he resided with his paternal grandfather, Gary Yeager, in Upland.

The young woman was abducted and viciously assaulted on July 26, 1988, while riding a moped to her family’s beach home in San Lucido, Italy. — Roberta Lanzino, 19, was a happy and energetic young woman on the cusp of a promising future. Family pictures show her beauty and zest for life. Roberta and her family resided in Rende, a small city in Cosenza, Calabria, in southern Italy. She was a typical teenage girl who loved…