10 COLD CASES THAT WERE NEVER SOLVED — AND WHY THEY STILL MATTER

He sent taunting ciphers to newspapers and claimed 37 victims. Only four of his coded messages have ever been solved.

Active across the San Francisco Bay Area, the Zodiac terrorized Northern California with a series of murders and cryptic letters designed to mock investigators. Despite a massive manhunt and dozens of suspects over five decades, no one has ever been charged. His final cipher — 340 characters — sat unsolved for 51 years before amateur cryptographers cracked it in 2020, only to find it contained no name.

He hijacked a commercial jet, extorted $200,000, then parachuted into a rainstorm and vanished forever.

On November 24, 1971, a man using the alias Dan Cooper boarded Northwest Orient Flight 305, handed a flight attendant a note claiming he had a bomb, collected $200,000 in ransom, and leapt from the aircraft somewhere over the Cascade Mountains. Despite the most exhaustive unsolved case in FBI history, his identity and fate remain unknown. A bundle of deteriorated $20 bills from the ransom turned up on a riverbank in 1980 — and nothing else ever has.

Her body was found bisected with surgical precision in a vacant lot. Over 150 suspects were questioned. None were charged.

On January 15, 1947, the body of 22-year-old Elizabeth Short was discovered in a Leimert Park field in Los Angeles — drained of blood, precisely severed at the waist, and posed with calculated deliberateness. The case became one of the most publicized murders in American history, spawning hundreds of confessions, books, and theories. Seventy years on, no suspect has ever been conclusively identified.

A child pageant queen was found murdered in her own home on Christmas night, with a ransom note left by someone who already knew she was dead.

Six-year-old JonBenét Ramsey was reported missing the morning of December 26, 1996 — and found strangled in the family's basement hours later. A ransom note demanded exactly $118,000, the amount of her father's Christmas bonus, suggesting someone with intimate knowledge of the family. Despite extensive DNA analysis, renewed grand jury proceedings, and a generation of suspects, no one has been charged.

She was found burned alive in a remote mountain valley, her labels cut out, her fingerprints partially removed, and her past a labyrinth of false identities.

On November 29, 1970, hikers in the Isdalen valley discovered the charred remains of an unidentified woman surrounded by two wine bottles, sleeping pills, and burned belongings. Norwegian police traced her movements through hotel registries across Europe, where she used at least eight different aliases and spoke multiple languages fluently. Fifty years of investigation, a 2017 forensic reinvestigation, and a BBC podcast have not definitively identified who she was or who killed her.

An unidentified man was found dead on Somerton Beach with a scrap of paper reading 'tamam shud' — 'it is finished' — torn from a rare edition of a Persian poem.

On December 1, 1948, the body of an elegantly dressed man was found at Somerton Park beach in Adelaide. His identity documents had been removed, and all clothing labels were cut out. In a hidden pocket was a torn page bearing the phrase 'tamam shud' from The Rubaiyat of Omar Khayyam — and a matching copy of that book was later found with an indecipherable code inside its cover. Despite facial reconstructions, DNA analysis, and decades of cryptographic attempts, neither his identity nor the code's meaning has ever been confirmed.

Eight people were bludgeoned to death in a single night — including six children — inside a locked farmhouse, with a killer who was never caught.

In the early morning hours of June 10, 1912, an unknown assailant murdered Josiah and Sarah Moore and their four children, plus two overnight guests, in the small town of Villisca, Iowa. Every mirror in the house had been covered and a lamp left burning by the killer. Two separate men were tried for the murders — one was acquitted, one received a hung jury. The case remains officially unsolved.

She crashed her car on a mountain road, told a passerby help wasn't needed, and then walked into the winter woods — and was never seen again.

On February 9, 2004, University of Massachusetts student Maura Murray crashed her car on Route 112 near Haverhill, New Hampshire. She declined help from a school bus driver and asked him not to call police, yet was gone by the time first responders arrived minutes later. No body, no confirmed sightings, and no credible leads have emerged in twenty years — despite extensive searches, a dedicated online investigator community, and renewed media attention.

A small boy's body was found in a cardboard box near a Philadelphia road. He was so well-cared-for that someone must have loved him — and yet no one has ever claimed him.

On February 25, 1957, a young boy between four and six years old was found in a JC Penney box on a road in northeast Philadelphia. He had been recently bathed, recently fed, and recently had his hair cut. Despite nationwide publicity, a 2019 DNA genealogy effort, and the work of countless investigators over 65 years, his name has never been confirmed and his killer never identified. He was given the name 'Joseph' and buried in a donated plot.

Someone sent anonymous letters accusing a rural Ohio woman of an affair — and when a man tried to expose them, he was killed by a booby-trapped mailbox.

Beginning in 1976, residents of Circleville, Ohio received unsigned poison-pen letters making damaging personal accusations, most targeting school bus driver Mary Gillispie. When her brother-in-law Paul Freshour attempted to uncover the letter-writer, he was nearly killed by a rifle rigged to his mailbox. Freshour was convicted, but the letters continued to arrive even while he was imprisoned — and the true author has never been conclusively identified.