What is the longest cold case?

Asked by: Dr. Maud Beer  |  Last update: April 27, 2026
Score: 4.1/5 (39 votes)

There isn't one single "longest" cold case, as it depends on whether it's solved or unsolved, but some notable ones include the Jack the Ripper murders (unsolved for over 135 years), and solved cases like Louisa Dunne (UK) in 1967, solved nearly 60 years later in 2025, and the Maria Ridulph murder (US) in 1957, one of the oldest solved in the U.S. at the time. The title often goes to cases solved after many decades due to DNA or new forensic techniques, with cases stretching over 50-60 years being significant milestones.

What is the longest solved cold case?

The murder of Louisa Dunne in the UK, solved in 2025 after 57 years, is considered one of the longest cold cases solved by conviction, with her killer, Ryland Headley, convicted at age 92 using DNA evidence that linked him to the 1967 crime scene. Other notable long-solved cases include the 1956 murders in Montana solved in 2021 (65 years) and the 1966 murder of Everett Delano in 2019 (52 years).
 

How long do cold cases last?

Cold Cases - What is a Cold Case

A case becomes “Cold” when all probative investigative leads available to the primary investigators are exhausted and the case remains open and unsolved after a period of three years.

What is the oldest cold case in history?

Using all the information scientists know about the extraordinary Copper Age mummy Ötzi the Iceman, a police detective assembled a detailed picture of his murder. For more than 5,000 years, the victim's body would be frozen on the spot where he died, trapped in a glacier.

What is the longest someone has been on death row?

The longest-serving death row inmate in the world was Iwao Hakamata of Japan, who spent 47 years on death row before being released and later acquitted in 2024, though he was exonerated in 2014 and received compensation for his wrongful imprisonment. In the U.S., Raymond Riles was the longest-serving, with over 45 years on Texas death row before being resentenced to life in prison in 2021 due to mental incompetence.
 

After 40 Years, DNA Reveals Unknown Toronto Serial Killer

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What is 25 years in jail called?

Individuals sentenced to LWOP are not eligible for parole and are expected to spend the rest of their lives in prison. Life With the Possibility of Parole: This sentence allows for the possibility of release after serving a minimum number of years, typically 25 years in California.

What is the shortest death row?

The shortest time on death row for a modern execution in the U.S. belongs to Joe Gonzales, who was executed in Texas after only 252 days (about 8.3 months) in 1996, having waived all appeals to speed up the process. He holds the record for the shortest time in Texas, though historically, some individuals in other eras, like Gary Gilmore, also had very quick executions after conviction. 

What was the oldest case on Cold Case?

Lilly and her team investigate their oldest case yet, the murder of a woman who was killed in 1919. They soon learn that she may have been murdered because of her activism for woman rights. Lilly and her team investigate their oldest case yet, the murder of a woman who was killed in 1919.

What murders were never solved?

Let's start with one of the most publicized unsolved cases, so popular, there's even a website dedicated to tracking this murderer down.

  • The Zodiac Killer. ...
  • The Taman Shud Case. ...
  • The Tara Calico Case. ...
  • The Severed Feet Mystery. ...
  • The Dead Woman Who Named Her Killer. ...
  • The Boy in the Box. ...
  • The Jeanette DePalma Case.

What is the hardest crime to solve?

Burglary is probably the most difficult to solve because its perpetrators do not have a motive that makes the victim's identity relevant. In most cases, they will elect to steal from an unoccupied home or dwelling, which may leave few, if any, witnesses.

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. 

How many serial killers never get caught?

It's impossible to know the exact number, but research suggests many serial killers are never caught, with estimates pointing to potentially thousands globally, including about seven uncaught killers in the 20th-century U.S. alone, some committing dozens of murders before disappearing or dying, while others operate undetected for long periods. 

Who was the man missing for 27 years found alive?

Algerian man found alive in cellar after 26 years

Omar bin Omran disappeared from Djelfa, in Algeria, during the Algerian civil war in the 1990s, when he was in his late teens. Now aged 45, Mr Bin Omran has been discovered just 200m from where he grew up.

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.

What is the most famous Cold Case?

Though several suspects have been investigated, the Zodiac killer's identity has never been proven. (The most scrutinized suspect, schoolteacher Arthur Leigh Allen, was institutionalized in 1975 for unrelated crimes.)

What is the 430000 year old skull?

This 430,000 year old skull is the earliest known human remains with direct evidence of murder. The cracks on the top of the skull were produced with a blunt tool. The fact that they are on the left side of the face shows that the attacker was likely right handed like most humans.

How much is $20 worth in jail?

$20 in jail can buy small commissary items like soap, toothpaste, snacks, stamps, or phone time, making a significant difference for basic comforts, but it won't cover major needs or luxuries, as prison markups inflate prices, with an inmate often needing $50-$150 monthly for basics, but even $20 helps with hygiene and small food/phone boosts. 

Who was hanged three times?

John Henry George "Babbacombe" Lee (15 August 1864 – 19 March 1945) was an Englishman famous for surviving three attempts to hang him for murder.

Was the guillotine painless?

The guillotine was designed for swift, supposedly painless death by severing the head, but whether it was truly painless is debated; while it caused rapid unconsciousness from blood loss, historical accounts and experiments suggest the severed head showed signs of sensation like twitching and redness, implying consciousness or pain perception might have lingered briefly after decapitation, making it quick but not necessarily instant or completely free of suffering.