What is the biggest cold case in history?

Asked by: Zackary Bosco  |  Last update: April 7, 2026
Score: 5/5 (34 votes)

There's no single "biggest" cold case, as "biggest" can mean most famous, most complex, or largest investigation; however, cases like the Black Dahlia, the D.B. Cooper hijacking, the Jack the Ripper murders (though pre-modern forensics), the disappearance of Madeleine McCann, and the unsolved Zodiac Killer are among the most notorious globally, involving vast media attention, complex circumstances, and enduring mystery, often featuring elements like serial killing, high-profile disappearances, or massive manhunts that defy resolution for decades.

What is the most famous cold case?

  • Introduction.
  • The Zodiac killer.
  • JonBenét Ramsey.
  • The Black Dahlia.
  • The Hall-Mills murders.
  • Lizzie Borden.

Who is the top 1 killer?

The number one killer globally and in the United States is Heart Disease (Cardiovascular Disease - CVD), responsible for millions of deaths annually, with cancer and unintentional injuries ranking high as other leading causes, though these can vary slightly by year and region. Heart disease causes issues like heart attacks and strokes, often linked to lifestyle factors, making prevention through diet, exercise, and avoiding tobacco crucial. 

What is the longest cold case in history?

The kidnapping and murder of Maria Ridulph is the nation's oldest cold case to go to trial. It required family members to turn against one of their own and haunted a small town for 55 years. Even now, the case may not be over.

What is the biggest unsolved mystery in history?

There's no single "biggest" mystery, but top contenders include the collapse of the Bronze Age, the Indus Valley Civilization's undeciphered script, the disappearance of the Lost Colony of Roanoke, and the true identities behind famous crimes like the Zodiac Killer, with many historical puzzles like the Voynich Manuscript or Cleopatra's tomb also remaining unsolved. The choice often depends on whether you prioritize ancient civilization enigmas, unexplained disappearances, or infamous crimes. 

The BIGGEST Cold Case Breaks in Forensic History | The New Detectives

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What is the darkest mystery in the world?

you'll realise that one thing is very clear: the biggest mystery of all is the Universe itself. Cosmologists are desperately trying to understand its birth, composition and destiny. They're certainly not there yet, although answers may well be within reach over the coming decades.

What is the longest missing person case ever solved?

There isn't one single definitively recorded "longest" case, but recent breakthroughs highlight cases solved after over 50 years, like Norman Prater (missing 1973, identified 2024/2025) and Ralph Stutzman (missing 1952, solved 2023), using DNA and genealogy; another notable example is Audrey Backeberg, found alive after nearly 63 years in 2025, and Ronald Joe Cole (missing 1965, identified 2026). These cases demonstrate how modern technology is finally solving exceptionally old cold cases, often involving unidentified remains or identity theft. 

What is the biggest killer of humans in history?

The deadliest killer of humans in history is often cited as Malaria, with estimates suggesting it has killed billions over millennia, while diseases like Tuberculosis and pandemics such as the Black Death and 1918 Spanish Flu also rank as catastrophic, claiming hundreds of millions of lives each through acute outbreaks, with the Black Death wiping out a massive chunk of Europe's population. 

Who is the longest serving prisoner alive today?

The identity of the world's longest-serving prisoner alive today is difficult to confirm definitively due to lack of global tracking, but in recent years, Francis Clifford Smith of Connecticut (imprisoned since 1950 for murder) was noted as potentially the longest-serving in the U.S. before being released on parole in 2020, making way for others like Raymond Riles, America's longest-serving death row inmate resentenced to life in 2021, though exact global records are elusive. 

What is the #1 silent killer?

The number one "silent killer" is High Blood Pressure (Hypertension) because it often has no symptoms but significantly increases the risk of severe health problems like heart attack, stroke, heart failure, and kidney disease. Many people don't know they have it until serious complications arise, making regular checks crucial for early detection and management through lifestyle changes and medication.
 

Who is America's favourite serial killer?

Even the portrayal of Dexter Morgan-his dress, attitude, and past-is enough to cause audiences to name him 'America's Favorite Serial Killer. '

What's the oldest cold case ever solved?

There isn't one single "oldest" solved cold case, as records vary, but prominent examples include the 1956 Bogle/Kalitzke murders in Montana (solved with DNA in 2021) and the 1957 Maria Ridulph murder in Illinois (oldest to go to trial, convicted 2012). More recently, the 1967 Louisa Dunne murder in the UK was solved in 2025, with a 92-year-old man convicted via DNA. Solving these decades-old cases often relies on modern DNA, genetic genealogy, and reinvestigation. 

What are the safest states in the USA?

Vermont ranks first in WalletHub's comprehensive safety ranking with a 67.22 score, while Maine shows the lowest violent crime rate at just 102.5 per 100,000 residents. Both states excel across multiple safety dimensions including low crime, strong financial security, and minimal natural disaster exposure.

What is the greatest crime of all time?

9/11 Investigation. They were the most lethal terrorist attacks in history, taking the lives of 3,000 Americans and international citizens and ultimately leading to far-reaching changes in anti-terror approaches and operations in the U.S. and around the globe.

What war had 0 deaths?

A "war with no casualties" typically refers to "bloodless wars" or "paper wars," like the famous Three Hundred and Thirty-Five Years' War (Netherlands vs. Isles of Scilly), which lasted centuries without a shot fired, or conflicts like the Kettle War and Anglo-Swedish War where formal declarations occurred, but actual fighting or deaths didn't happen, often ending with treaties and trade continuing. These conflicts are characterized by political disputes, threats, or minor incidents that never escalated into actual combat or fatal engagements, highlighting disputes resolved through diplomacy or sheer neglect.
 

What is the deadliest day in human history?

The deadliest single day in human history is widely considered to be January 23, 1556, when the Shaanxi earthquake struck central China, killing an estimated 830,000 people due to collapsing cave dwellings, landslides, and ground fissures, significantly impacting the region's population. While other events like major floods or war-related massacres caused immense casualties, this earthquake stands out for its staggering death toll in a short period.
 

What is the #1 killer in America?

The number one killer in America is heart disease, consistently ranking as the leading cause of death for men, women, and most racial/ethnic groups, followed by cancer, with unintentional injuries (accidents) as a significant third cause. Cardiovascular diseases, including heart attack and stroke, claim more lives than all forms of cancer and accidents combined.
 

Who is the longest person missing?

The longest active missing person case in the U.S. is widely considered to be Marvin A. Clark, who vanished in 1926 in Oregon, with his case remaining unsolved despite efforts to identify remains found decades later, while some of the longest resolved cases involve people found alive after decades, like Lucy Ann Johnson (missing 52 years) or cases solved with DNA after many years, highlighting different categories of "longest" missing person stories. 

Has Samantha Murphy's body been found?

Ms Murphy, aged 51 at the time she went missing, was last seen alive on February 4, 2024, when she left her home in Ballarat for a morning run. Her body has not been found despite a number of police and community searches.

Was Baby Holly found alive?

Baby Holly's story shocked the world in 2021 when she was found alive. She'd been missing for more than 40 years. Her story started back in 1981 when a young couple was found murdered, and no one knew who they were.

Who was the longest missing child?

The longest missing child case often cited is Marjorie West, who vanished in Pennsylvania in 1938 at age 4 and remains missing, making her case over 87 years old, while other notable long-term missing persons include Dennis Martin (since 1969 in a national park) and Mary Boyle (since 1977 in Ireland). Some cases, like that of 6-year-old Luis Armando Albino, abducted in 1951, have recently been resolved decades later with the individual found alive.
 

What car was found in the river after 66 years?

After 66 years, a submerged Ford station wagon believed to belong to the missing Martin family has been recovered from the Columbia River. (AP/Archer Mayo) Diver's discovery leads to retrieval of 1950s station wagon from Columbia River, potentially solving 66-year-old mystery.

Was Morgan Nick's body ever found?

No, Morgan Nick's body has never been found, despite her 1995 abduction from an Alma, Arkansas ball field and recent DNA evidence linking her disappearance to suspect Billy Jack Lincks, who died in 2000. While investigators have identified Lincks as the abductor and found physical evidence connecting him to the crime, her remains remain missing, leaving her family without closure on her final resting place.