In the late 1960s, a killer terrorised California, claimed responsibility through cryptic letters & ciphers, then vanished into one of America’s biggest unsolved mysteries

The Zodiac Killer is one of the most notorious unidentified serial killers in American history. Between 1968 and 1969, the killer attacked people in California's San Francisco Bay Area, killing five and leaving two survivors. But the murders were only part of the mystery. The Zodiac also sent a series of bizarre letters and coded messages to newspapers, taunting police and claiming responsibility for the killings.

More than five decades later, the killer's identity remains unknown. Despite years of investigations, countless theories and several people being considered as suspects, authorities have never conclusively identified the person behind the Zodiac name.

Read more - Post-1949, China increased its forest cover from 10% to 25%, but scientists found an unexpected side effect: Tree planting shifted water away from East & Northwest towards the Tibetan Plateau

Who was the Zodiac Killer?

The Zodiac Killer was an unidentified serial killer who attacked seven people during four separate incidents in California between December 1968 and October 1969. Five victims were killed, while two survived.

The attacks took place in Benicia, Vallejo, Napa County and San Francisco. The victims included young couples as well as taxi driver Paul Stine, whose murder marked the final confirmed Zodiac killing.

Zodiac Killer victims and attacks

The first known attack happened on December 20, 1968, on Lake Herman Road in Benicia. Teenagers David Arthur Faraday, 17, and Betty Lou Jensen, 16, were shot and killed.

On the night of July 4, 1969, or in the early hours of July 5, the Zodiac attacked Darlene Elizabeth Ferrin, 22, and Michael Renault Mageau, 19, in the parking lot of Blue Rock Springs Park in Vallejo. Ferrin died from her injuries, while Mageau survived.

The next confirmed attack came on September 27, 1969, at Lake Berryessa in Napa County. Bryan Calvin Hartnell, 20, and Cecelia Ann Shepard, 22, were stabbed. Hartnell survived, but Shepard died two days later from her injuries.

On October 11, 1969, taxi driver Paul Lee Stine, 29, was shot and killed in San Francisco's Presidio Heights neighbourhood. The killing became the last confirmed murder attributed to the Zodiac.

The Zodiac letters to newspapers

What made the case even more bizarre was the killer's decision to contact newspapers. As per reports, from 1969 to 1974, the Zodiac sent more than 20 letters to newspapers, police, journalist Paul Avery and attorney Melvin Belli. In his letters, the writer claimed responsibility for the attacks, revealed details that investigators believed were known only to police and threatened further killings if newspapers refused to publish his messages.

The writer introduced himself as "The Zodiac" and used a distinctive symbol resembling the crosshairs of a gunsight as his signature.

Zodiac Killer cryptograms

Some of the Zodiac's most famous messages were cryptograms, or coded messages. Four cryptograms were included in his correspondence.

Two have been solved, while two remain unsolved. The first major Zodiac cipher was cracked in 1969 by a husband-and-wife team, Donald and Bettye Harden.

Another, known as the Z340 cipher, remained unsolved for more than 50 years before an international team of codebreakers solved it in 2020.

Even after the ciphers were decoded, they did not reveal the killer's identity, keeping one of America's biggest true-crime mysteries alive.

Did the Zodiac Killer claim to have killed 37 people?

Although investigators have linked the Zodiac to five confirmed killings, the writer claimed responsibility for many more.

In a letter received by the San Francisco Chronicle in 1974, the Zodiac claimed to have killed 37 people. However, authorities have never established that the claim was genuine.

The confirmed Zodiac attacks remain seven victims across four incidents, with five deaths and two survivors.

Who was Arthur Leigh Allen?

Over the years, numerous people have been suggested as possible Zodiac suspects. However, Arthur Leigh Allen was the only person ever publicly named as a suspect by police.

Allen was a former elementary school teacher and convicted sex offender. Investigators examined him extensively, but he was never charged with the Zodiac killings. He died in 1992 without the case being solved.

Other theories about the killer's identity have continued to circulate among investigators, journalists and amateur detectives, but none has been conclusively proven.

Is the Zodiac Killer case still open?

The status of the Zodiac case has changed over the years. In 2004, the San Francisco Police Department marked the case as inactive. It was later reopened in 2006.

The California Department of Justice, FBI, Vallejo authorities and the Napa and Solano county sheriffs have continued to maintain the case as open.


Inputs from agencies