The St. Valentine's Day massacre is still unsolved

Valentine's Day's namesake is unclear

Valentine, which means "powerful" or "worthy," was a popular name in the Roman Empire. Considering that, it's no surprise that there's more than one St. Valentine. In fact, three different men named Valentine were martyred on February 14, and none of them, despite some unproven legends, were ever associated with love or romance.

Searching for a hate crime's unknown victim

In 2004, two federal agents heard a rumor: two white men, one under investigation for an unrelated crime, had gotten away with killing a Black man 15 years earlier as a requirement to join a white supremacist group. One of the men confessed to the crime, though he didn't know who was killed. This series dives into the search for the slain man and the justice he deserved.

Al Capone's business structure kept him from ever getting charged for bootlegging

During the Prohibition era, Al Capone sold then-illegal alcohol through people who funneled cash and held bank accounts for him. His name never showed up on any paperwork, meaning it was impossible to actually charge him with bootlegging or any of his violent crimes. But no paper trail for his lavish lifestyle also meant he wasn't paying taxes, which is how prosecutors ultimately put Capone in jail.

Moss provided the evidence to convict Chicago cemetery grave robbers

In 2009, employees at Burr Oak Cemetery were accused of exhuming graves to resell burial plots, but they argued the events took place before their employment. An analysis of moss, whose metabolic activity deteriorates at a known rate, with the transported human remains helped establish a timeline that placed the accused at the crime scene.

Who was behind the fatal 1982 Tylenol poisonings?

In 1982, an unknown suspect laced Tylenol packages with potassium cyanide in a Chicago pharmacy. Seven people were killed, and the case led to a nationwide panic, as well as the development of tamper-resistant packaging. No one was ever charged with the deaths, and the lead suspect died in 2023 after serving time in prison for trying to extort $1 million from a manufacturer to "stop the killing."

Conspiracy theories persist around Dr. Martin Luther King Jr.'s 1968 assassination

Despite multiple investigations—including FBI inquiries and a 1979 House committee report—questions and conspiracy theories have continued to surround the 1968 assassination of Dr. King long after his assassin’s conviction.

The 1919 Chicago White Sox were banned from baseball for fixing the World Series

The Black Sox scandal involved eight 1919 Chicago White Sox members accused of intentionally losing that season’s World Series in exchange for financial kickbacks from gamblers. Ultimately acquitted in court, the players, including star outfielder “Shoeless” Joe Jackson, were permanently banned from baseball.

English playwright Christopher Marlowe's violent and mysterious death

According to an official coroner’s report, in 1593 a heated argument over payment for supper escalated into a physical struggle, during which Marlowe wounded a man named Ingram Frizer, who then fatally stabbed Marlowe above the right eye. Though we still don't have a definitive explanation for why Marlowe was killed, the true motive continues to be debated, with suspicions surrounding the official account. Read more here.

In 1915, workers recovered a submarine-like vessel from the Chicago River, prompting fears of German espionage

Two men dressed as cops stole artwork from a Boston museum valued at over $500M at the time

On March 18, 1990, the thieves entered Isabella Stewart Gardner Museum pretending to be police officers responding to a disturbance. After overpowering and handcuffing the guards on duty, they stole 13 precious items, including works by Rembrandt and Manet. The theft is the largest art heist in US history. The pieces are still missing, and the museum is offering a $10M reward to anyone who provides valuable information about their location.

Abraham Lincoln's missing bodyguard

The night President Abraham Lincoln was shot, his bodyguard John Frederick Parker was late for his shift—and reportedly left his post to drink at the bar. Infamous assassin John Wilkes Booth entered the booth at Ford's Theater where the president sat while Parker was absent, leading to one of the United States' greatest political tragedies. Read more about the troubled history of Parker here.

The Foolkiller: The mysterious submarine at the bottom of the Chicago River

In November 1915, a submarine was found at the bottom of the Chicago River. It had been there for at least 10 years, was 40 feet long, and contained the remains of a man and his dog. To this day, no one knows who built it.

The FBI's most famous cases

From the D.B. Cooper plane hijacking to the kidnapping of Frank Sinatra Jr. to the details about the first FBI agent killed in the line of duty, this FBI archive overviews the agency's most famous cases. Cases are organized by investigative priorities, according to the agency. Clicking any of the linked investigations takes readers to detailed articles about the cases, some of which remain unsolved.

Get to know the five families that ran the NYC mafia

In the 1900s, there were five families in New York City who dominated the crime scene. These five families organized expansive criminal operations—ranging from prostitution and price extortion to money laundering—and have inspired stories like "The Godfather."

The mysterious details of Stalin's death

The 73-year-old dictator of the Soviet Union died March 5, 1953, officially from a stroke, on top of nearly a decade of significant medical issues. But evidence suggests the longtime leader might have been poisoned less than a week before at an intimate gathering of Stalin's closest confidantes and advisors. Explore the current evidence for Stalin's alleged murder here.

A lost Jack Kerouac story was discovered in the belongings of a gunned-down mob boss

The unpublished "The Holy, Beat, and Crazy Next Thing" was found in the belongings of Paul Castellano, who was murdered in 1985. It's unclear why Castellano had it, though an heir says it was originally in the collection of a "noted San Francisco-based poet...who received it directly from the author."

The inside story of the 1969 murder of coal union leader Jock Yablonski

In 1969, Jock Yablonski challenged the longtime president of the United Mine Workers, Tony Boyle. On New Year's Eve of that year, Yablonski, his wife, and their daughter were brutally murdered in their beds.

Abraham Lincoln was almost assassinated weeks before his inauguration as he traveled from Illinois to DC through Baltimore in 1861; it took two independent claims for Lincoln to be convinced the threat was real

Irish immigrants deserted the US Army to fight for Mexico

During the Mexican-American War, hundreds of Irish Catholic immigrants—facing discrimination in the US Army—defected to Mexico and formed the Saint Patrick’s Battalion. Though many were captured and executed, they remain honored as heroes in Mexico.

'Bonnie and Clyde,' the 1967 film starring Warren Beatty and Faye Dunaway, was the first major American movie to feature graphic violence.

Director Arthur Penn used the then-new Squibb technology, which triggered realistic and bloody bullet wounds, to portray graphic violence, at the time a taboo in American cinema.

Watergate's anti-Castro Latino burglars believed they were fighting communism

Among the Watergate burglars, Virgilio González, Bernard Barker, and Eugenio Martínez were Cuban American anti-Castro exiles who believed they were combating communist influence in the United States.

An in-depth history of Guy Fawkes and the Gunpowder Plot

Guy Fawkes Day has been celebrated on November 5 in the United Kingdom for over four centuries, with bonfires, fireworks, and effigies. But who was Guy Fawkes, really? Learn about the Catholic radical who was a member of a group of 13 men eventually executed for their attempts to blow up Parliament and the king.

The identity of the Tank Man in the iconic photo from the 1989 Tiananmen Square protests remains unknown and was possibly killed.

Were 'Back to the Future' and 'The Goonies' set on the same day?

Two of the most cherished sci-fi movies of all time came out less than a month apart in 1985. Fans theorize that the pivotal events of lead characters Marty McFly and Michael “Mikey” Walsh both took place on Saturday, Oct. 26, 1985. Dive deeper into the theory about the coincidence between two major cinematic universes.

A tragic injury led to the original NHL All-Star Game

The annual NHL All-Star Game is a joyous affair celebrating the best players each season. But its origins came from one of the most terrifying moments in hockey history. In a 1933 game, Maple Leafs wing Ace Bailey was nearly killed on the ice, and the NHL organized a benefit game to raise money for his family.

US intelligence allegedly pursued more than 600 schemes to assassinate Cuban revolutionary Fidel Castro.

How WWI began with the assassination of Archduke Franz Ferdinand

World War I started for several reasons—imperialism, militarism, nationalism, and more—but the catalyst was the assassination of Archduke Franz Ferdinand and his wife Sophie, the Duchess of Hohenberg by the young assassin Gavrilo Princip. Read this article ton see how the assassination sparked the chain reaction that led to the Great War.

US marshals were the first federal law enforcement officers

Established in 1789, US marshals carried out court orders, served subpoenas, made arrests, and collected fines—serving as the federal government's main law enforcement agency across the states for nearly a century before the creation of the DOJ.

After her fellow cult members tried to kill her with an LSD-infused hamburger, one member of the Manson Family, the murderous cult led by Charles Manson, decided to testify against the group's leader.

The host of ‘The Dating Game’ claimed it was a CIA front

In his 1984 autobiography, “Confessions of a Dangerous Mind,” “Dating Game” host Chuck Barris claimed the show was a front concealing his true job as a contract assassin for the CIA. Despite skeptical responses and a lack of evidence, Barris continued to say the story was true. In 2002, screenwriter Charlie Kaufman adapted the book for the screen.

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

The US first hosted the World Cup in 1994, a tournament that lives in soccer infamy for its poor planning and the murder of Colombian player Andres Escobar, who'd accidentally scored on his own net.

Exploring the Larry Bird punch that almost changed March Madness

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

70 years ago today, city officials in Santa Cruz, California, banned rock 'n' roll to protect its youth from corruption after witnessing a 'provocative' concert the night before.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

Learn more about the history of fireworks, which dates back to an accidental invention during an alchemist's quest for information about immortality.

'Saturday Night Fever,' the 1977 film that introduced disco to the mainstream, was based on a fabricated magazine story.

In 1945, Surrealist artist Salvador Dalí and legendary animator Walt Disney began collaborating on a short film that was not completed until 2003, years after both men had died.

Watch a 1934 short film starring jazz legend Cab Calloway, a major figure in the Harlem Renaissance's music scene

Art theft is the third-largest source of criminal revenues worldwide, thanks in part to the subjective nature of valuing a work of art.

View the ten deadliest tornadoes in US history.

During the French Revolution, a botanist's letter asking about "dear Rhus" (poison ivy) was intercepted, leading authorities to suspect he was conspiring with the Russians.

American dance legend Martha Graham, sometimes called 'the Picasso of dance,' refused to perform at the 1936 Olympics in Berlin and conceived the piece 'Chronicle' in response to the experience.

Marburg virus, related to Ebola, is also extremely deadly, and has no available vaccine.

Domino's Pizza's 30-minute delivery guarantee was responsible for the chain's 1980s surge, but it was discontinued after the company was found liable for delivery driver accidents.

'Grand Canyon of the Yellowstone,' a work by American painter Thomas Moran, inspired Congress to establish Yellowstone National Park.

See a ranking of the best (and worst) Federal Reserve Chairs since 1914 out of the 16 men and women who have held the office since.

Recent research found that the brain doesn't seem to massively rewire following amputation—upending earlier beliefs about the cause of phantom limb pain.

Hotels in Cannes, the glamorous city on the French Riviera, hire hawks to ward off seagulls during the city's famous film festival.