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On April 21, 1986, some 30 million people watched Geraldo Rivera break into a sealed chamber beneath Chicago's Lexington Hotel, once Al Capone's headquarters, and find dirt, debris, and a few empty bottles. This episode tells how The Mystery of Al Capone's Vaults came to exist. A construction survey of the derelict hotel turned up walled-off chambers, and producers John Joslyn and Doug Llewelyn in...

The nickname suggests a man breaking kneecaps in an alley. The real Frank Nitti delegated violence and watched the numbers. Born in 1886 in the Campania region of Italy, he arrived in Brooklyn at seven, left school after the seventh grade, worked as a barber, and left home at 14. He ran with Al Capone's older brothers in the Navy Street Boys, though the two men were never cousins. An early scheme...

The Wild Bunch of the 1890s, also called the Doolin-Dalton Gang, began with a pay dispute. Bill Doolin, George Newcomb, and Charlie Pierce were hired guns for Bob Dalton until a bloody train robbery at Adair in July 1892 convinced them he was shortchanging them. They quit. Three months later Dalton tried to rob two banks at once in Coffeyville, Kansas, and four of the five gang members involved we...

She rode with Butch Cassidy's Wild Bunch as the companion of Harry Longabaugh, the Sundance Kid, and was hunted by the Pinkerton Detective Agency across two continents. Yet almost nothing about Etta Place can be proven. A Pinkerton description from 1906 gives her age as 27 or 28, her height as about five foot four, her weight as 110 to 115 pounds, and her hair as brown. There is no birth certifica...

The killer bee panic of the late 20th century began with a farming problem. In 1956, Brazilian biologist Warwick E. Kerr imported African honeybees to cross with European strains that were sluggish in tropical heat. He kept them near Rio Claro behind queen excluders, metal screens that let workers out and kept queens in. In October 1957 a visiting beekeeper, thinking the screens were slowing the w...

In 1800, Alexander von Humboldt watched fishers drive wild horses into a muddy South American pond until electric eels rose from the water and shocked two of them into drowning. This episode explains the animal behind that scene, starting with a correction: electric eels are not eels at all but neotropical knifefishes. For 250 years, from Carl Linnaeus in 1766 onward, science assumed there was a s...

In 1808, two men rose over Paris in hot air balloons and fired blunderbusses at each other's envelopes. A century later, at the 1908 London Olympics, competitors in heavy coats and metal helmets shot each other with wax bullets. This episode connects those scenes to a serious institution. Dueling began as medieval judicial combat, a trial in which God was expected to grant victory to the honest pa...

Two men with pistols on a foggy field at dawn looks like the collapse of law. This episode argues the opposite: the code duello was an obsessive legal framework built to contain violence. Early societies settled insults with blood feuds that could erase half a village, so the duel quarantined the fight to two people in front of witnesses. The story starts in the seventh century B.C., when Rome and...

Interpol is not the global strike force of spy thrillers. It is an office building in Lyon, France, staffed by bureaucrats and IT professionals, and not one of them can arrest anyone. This episode explains what the organization really is: 196 member states, a 2023 budget of 176 million euros, and an encrypted network called I-24/7 that links police forces to databases of fingerprints, DNA, faces,...

From 1852 to 1953, France shipped more than 80,000 men to a penal colony in French Guiana, and almost none came home. This episode traces how the system began: rotting prison hulks moored in French harbors, cities swelling from under 6 million to over 16 million residents, and a recidivism rate of 75 percent. In 1851 Napoleon III decided to empty the floating prisons, weighed dumping grounds as un...

In 1979 a family hunting arrowheads in an Idaho cave found a headless torso in a shallow grave. In 2019, genetic genealogy gave it a name: Joseph Henry Loveless, a bootlegger who sawed his way out of a county jail in 1916 while accused of killing his wife with an axe. That case opens this episode on cold cases, investigations no longer actively pursued but never closed, which are mostly murders be...

A defendant is acquitted of murder, then later confesses, or DNA proves the jury wrong. For centuries the law's answer was that nothing could be done. This episode traces double jeopardy from Roman law through 800 years of English common law, where it shielded citizens from a state with unlimited time and money to retry them until it won. The price was accepted openly: better that some guilty peop...

A stagecoach stops on a dark English road, the door opens, and a man in velvet and lace bows and asks the lady inside for a dance. That was Claude Duval, born around 1643 in Normandy to a miller and a tailor's daughter. Sent to Paris as a servant at 14, he became a stable boy for exiled English royalists, followed them to England at the Restoration, and worked as a footman for the Duke of Richmond...

A hiker in southern Brazil leans a hand against a tree trunk and feels a sharp burn. No snake, no spider. The hand has landed on a cluster of Lonomia caterpillars, the larvae of a giant silkworm moth whose adults are harmless and often have no working mouthparts. The caterpillars look like lichen or a knot in the bark, and they rest together in dense groups low on the trunk. Their hollow, branchin...

The name Casanova now means a promiscuous lover, but Giacomo Girolamo Casanova was also a law graduate at 17, a cleric, a violinist, a spy, and a founder of the French state lottery. Born in Venice in 1725, he learned early that people want to believe in secret knowledge. When a senator named Bragadin suffered a stroke in a gondola, Casanova overruled the doctor, had a mercury ointment washed off,...

Carlos Henrique Raposo, known as Carlos Kaiser, spent 14 years as a professional footballer while avoiding almost any actual football. Born in Porto Alegre, Brazil in 1963, he had real youth spells at Botafogo and Flamengo and signed with the Mexican club Puebla in 1979, only to be released months later without a match. He loved the status and hated the work, so he turned the job into networking,...

Type the word Candiru into Wikipedia and you get no answer, only a question about which Candiru you meant. This episode takes that short disambiguation page as its entire source and treats it as a study in how databases cope with human language. The page lists three things under the same seven letters: a number of fish species known by a common name, the Candiru phlebovirus, and an Israeli spyware...

A juror once complained to a judge that police had failed to dust the lawn for fingerprints. That story opens this episode on the CSI effect, the claim that the show CSI: Crime Scene Investigation, which premiered in 2000, rewired what the public expects from forensic science. On screen, lab technicians raid houses and interrogate suspects, plaster poured into a stab wound reveals the exact knife,...

Gulag was never a Russian word for prison. It was an acronym for a government office, the main directorate of correctional labor camps, run by the secret police from the 1930s. This episode examines the machinery behind the name: the tsarist exile system that once held Lenin, Trotsky, and Stalin, the early Bolshevik camps built to quarantine political enemies, and the monastery island of Solovki,...

From 1996 to 2013, a lake on a golf course in Queensland, Australia held a thriving population of bull sharks. This episode explains how a marine predator ends up there. The bull shark is stocky and built for shallow, murky water, with females reaching 13 feet and over 1,300 pounds when pregnant. Its bite, measured at up to 1,330 pounds of force, is the strongest for its weight of any cartilaginou...

Between 1784 and 1868, Britain shipped roughly 160,000 men, women, and children to penal colonies in Australia, and about four million Australians now trace their ancestry to them. This episode begins in the crowded, gin-soaked cities of 18th century England, where the Bloody Code made 222 crimes punishable by death, including stealing a rabbit. Juries refused to convict, jails overflowed into rot...

Someone in a bullet-resistant vest kicks in a front door at night to seize a fugitive, with no police badge and no search warrant. That is bounty hunting, a real profession practiced almost exclusively in the United States. This episode explains the civil contract behind it: a defendant pays a bail bondsman a fee of about 10 percent, the bondsman guarantees the full bail to the court, and if the d...

In 1876, Spanish officials arrested a common seaman stepping off a ship because they knew his face from a political cartoon. He was William Tweed, Boss Tweed of Tammany Hall, once the third largest landowner in New York City and the man accused of taking between 25 million and 200 million dollars from its taxpayers. This episode follows the chair maker's son, born on the Lower East Side in 1823, f...

A bloodhound named Nick Carter followed a trail that was 300 hours old in 1900, and in Oregon in 1954 another hound worked a 330-hour-old trail to find a missing family. This episode explains how a dog that looks like a sleepy cartoon outperforms any sensor. Nearly 300 million scent receptors do the processing, long ears sweep shed skin cells up from the ground, and the loose wrinkled skin known a...

The black mamba is olive, khaki, or gunmetal, never black. Its name comes from the inky interior of its mouth, which it shows only as a last warning. This episode separates the legend from the biology of Africa's longest venomous snake, an animal that averages two to three meters, weighs only a few pounds, tops out near 16 kilometers per hour, and returns to the same termite mound or rock crevice...