The winter of 1923 saw more murders in the Osage Hills, but no one was prepared for the brazen and brutal attack that happened in March. In the aftermath, the Osage pressed the U.S. government and the state of Oklahoma for help, but their efforts produced few results. And then, criminals in Osage County started dying. The masterminds behind the conspiracy began covering their tracks and further proved no one was safe.

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The Osage and local lawmen began to investigate the first two murders, but their efforts produced few results. The Osage were scared and frustrated, and the body count started to rise at an appalling rate. The second half of 1922 was the deadliest period to date, but it would be surpassed in 1923.

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In 1921, two murder victims were discovered on the same day in Osage County in northeastern Oklahoma. It was shocking news, but members of the Osage tribe already knew they were in danger. They were some of the richest people on Earth, thanks to the oil under their land, and they had been dying in mysterious ways for years. But when the two bodies were found on the same day, it launched a 5-year period known as the Reign of Terror. No one was safe, and no one could be trusted.

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At the end of the Labor Day weekend in 1982, people in the tiny fishing village of Craig, Alaska noticed a boat burning in the harbor. When they raced to help, they realized it was an expensive vessel called the Investor. The eight people who were likely onboard were never seen again. The investigation into the tragedy, which would soon be called murder, would be the longest and most expensive in Alaska history.

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A tragedy unfolds on Christmas Eve, 1945 in a small town in West Virginia. The Sodder family – 2 parents and 9 children – go to bed after a happy celebration. But during the night, a series of unexplained events occur. The events culminate in a raging fire that burns the family’s house to the ground. It appears as though five children were lost during the blaze, but the rest of the family embarks on a 20-year campaign to discover the truth of the missing children.

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On January 2, 1935, a man who calls himself Roland T. Owen checks into a hotel in Kansas City, Missouri. Over the next 48 hours, the events surrounding Roland Owen grow increasingly strange … until he is discovered badly beaten and locked in his room. It takes years to unravel the mystery of his true identity, but most of the questions about this story remain unanswered.

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A year and a half after the first Zodiac crime, a man kidnaps a pregnant mother and her daughter. Their terrifying ordeal becomes associated with the Zodiac and eventually leads reporter Paul Avery to look backward in time for other Zodiac crimes. He discovers a murder in Riverside, California that might be connected. Meanwhile, detectives focus on their top suspect and spend more than 20 years trying to catch him.

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Two weeks after the attack at Lake Berryessa, the Zodiac shoots and kills a taxi cab driver in San Francisco. Multiple witnesses see the killer, but the police still struggle to find him. The killer sends more letters and now issues threats against school kids in the San Francisco region. At the same time, it appears as though he organizes a stunt with a local TV show. The bizarre TV episode leads to more frustration for police, and more letters from the killer.

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Two college students relax along the shore of a lake in Napa County, California on a sunny afternoon in September of 1969. Before long, they are interrupted by a man who wears an eerie black hood and carries a gun. The man attacks the students with a knife and leaves them for dead. The killer writes a message on the students’ car and calls the police to take credit for the crime. In the process, he leaves behind new clues that investigators add to the growing list of evidence about the elusive criminal.

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While the police, the FBI, the U.S. Navy, and random civilians try to break the code of the killer’s cipher, the killer sends another letter to the press. He gives himself a name, the Zodiac, and taunts the police departments that are unable to catch him. Within a few days, a pair of teachers break the code of the Zodiac’s cipher and reveal the twisted ramblings of a killer. Meanwhile, the Zodiac prepares for his next crime.

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Seven months after two teenagers are murdered outside Vallejo, California, the killer reemerges. He shoots two young people at a park on the outskirts of the city, but this time one of the victims survives. Shortly after the attack, the killer calls the Vallejo police department and sets in motion a pattern of communication that will be unrivaled in American criminal history. A month later, he sends letters to three newspapers and includes a cipher that contains a coded message.

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