Zodiac Killer
An unidentified serial killer who operated in Northern California in the late 1960s and early 1970s, taunting police and media with cryptic letters and ciphers. Five murders are confirmed, with two survivors, though the Zodiac claimed as many as 37 victims. The case remains one of the most famous unsolved murder mysteries in American history.
Case overview
The Zodiac Killer was an unidentified serial killer who operated in Northern California in the late 1960s and early 1970s. Officially credited with five confirmed murders and two survivors, the Zodiac taunted police and newspapers with cryptic letters, ciphers, and coded messages over several years. Despite one of the largest investigations in California history, the case remains unsolved. [Washington Post](https://www.washingtonpost.com/history/2019/10/11/fifty-years-later-zodiac-killer-still-haunts-bay-area/)
The Zodiac's first confirmed murders occurred on December 20, 1968, at Lake Herman Road in Benicia, Solano County, when high school students Betty Lou Jensen (age 16) and David Faraday (age 17) were shot and killed while parked in Faraday's car.
On July 4, 1969, at Blue Rock Springs Park in Vallejo, Darlene Ferrin (age 22) was killed and Michael Mageau (age 19) was wounded. Mageau survived and later provided a physical description of the shooter. One month later, the killer — who had not yet used the name Zodiac — sent letters to three Bay Area newspapers claiming responsibility for both attacks. He included portions of a 408-symbol cipher, demanding the newspapers print the messages or he would "go on a kill rampage." [CNN](https://www.cnn.com/2019/10/11/us/zodiac-killer-50-years-san-francisco/index.html)
A schoolteacher and his wife, Donald and Bettye Harden, decoded the cipher, which contained the chilling message: "I like killing people because it is so much fun." The killer signed his letters with a cross-circle symbol that became his iconic "brand." He claimed 37 victims total, though investigators believe many of these claims were fabrications.
On September 27, 1969, the Zodiac attacked Bryan Hartnell and Cecelia Shepard at Lake Berryessa in Napa County. Both were tied up and stabbed repeatedly. Shepard died two days later; Hartnell survived. The Zodiac called police to report the crime. Two weeks later, on October 11, 1969, he shot cab driver Paul Stine in San Francisco. [BBC](https://www.bbc.com/news/world-us-canada-55169572)
In December 2020, a team of amateur code-breakers announced they had cracked the Zodiac's famous 340-character cipher, which had remained unsolved for 51 years. The decoded message read in part: "I hope you are having lots of fun in trying to catch me." The killer was never identified. [NPR](https://www.npr.org/2020/12/11/945435707/zodiac-killer-cipher-decoded)
The Zodiac Killer case was officially investigated by multiple law enforcement agencies, including the Vallejo Police Department, Napa County Sheriff's Office, San Francisco Police Department, and the California Department of Justice. Despite an enormous investigation involving thousands of tips and suspects, the killer was never identified or prosecuted.
The Zodiac sent over a dozen letters to newspapers and police, including coded ciphers, pieces of a bloody shirt, and personal taunts. One cipher — the 340-character cipher — remained unsolved for 51 years until December 2020, when three amateur code-breakers cracked it using specialized software. [AP News](https://apnews.com/article/zodiac-killer-cipher-cracked-2020) The FBI confirmed the decryption was valid.
Among the most investigated suspects was Arthur Leigh Allen, a Vallejo resident who was repeatedly investigated but never charged. Investigators obtained handwriting samples and DNA from Allen, but neither definitively matched evidence from the case. Allen died in 1992 without being charged. [The Guardian](https://www.theguardian.com/us-news/2020/dec/12/zodiac-killer-cipher-cracked)
The statute of limitations for murder does not run out in California. The case technically remains open. As of 2021, the San Francisco Police Department announced they had tested a partial DNA profile obtained from the case, but no arrest was made. [CNN](https://www.cnn.com/2019/10/11/us/zodiac-killer-50-years-san-francisco/index.html)
The case is considered one of the most famous cold cases in American history, inspiring books, films, and documentaries. The killer's true identity has never been confirmed.
January 29, 1974
Final Zodiac letter
The Zodiac sent what is believed to be his final letter, the Exorcist letter, to the San Francisco Chronicle. The killer was never identified or arrested.
Source →October 11, 1969
Murder of Paul Stine in San Francisco
Taxi driver Paul Stine, 29, was shot in the head in the Presidio Heights neighborhood of San Francisco — the last confirmed Zodiac murder.
Source →September 27, 1969
Lake Berryessa attack
Bryan Hartnell and Cecelia Shepard were stabbed at Lake Berryessa, Napa County. Shepard died two days later; Hartnell survived.
Source →August 1, 1969
Zodiac sends first cipher letters to newspapers
The Zodiac sent three letters to three Bay Area newspapers, each containing one-third of a 408-symbol cipher, threatening to go on a killing rampage if they were not published on the front page.
Source →December 20, 1968
First confirmed Zodiac murders
David Faraday, 17, and Betty Lou Jensen, 16, were shot and killed on Lake Herman Road in Benicia, California — the first confirmed Zodiac Killer attack.
Source →Relationship data not yet mapped — nodes positioned by force simulation.
David Faraday
David Arthur Faraday, 17, was the first confirmed victim of the Zodiac Killer, shot and killed on December 20, 1968 on Lake Herman Road near Benicia, California, along with his date Betty Lou Jensen.
Paul Stine
Paul Lee Stine was a San Francisco taxi driver shot and killed by the Zodiac in the Presidio Heights neighborhood on October 11, 1969. His killing was the last confirmed Zodiac murder in San Francisco.
Darlene Ferrin
Darlene Elizabeth Ferrin, 22, was shot by the Zodiac Killer at Blue Rock Springs Park in Vallejo on July 4, 1969. She died at Kaiser Foundation Hospital in the early morning hours of July 5.
408-Symbol Cipher — Newspaper Publication
On July 31, 1969, the Zodiac mailed three parts of a 408-symbol cipher to the San Francisco Examiner, San Francisco Chronicle, and Vallejo Times-Herald, demanding the newspapers print it or he would kill again. Amateur cryptographers Donald and Bettye Harden solved it within days; it read "I like killing people because it is so much fun."
San Francisco Examiner, July 31, 1969 (public domain)Bloody Fingerprint — Paul Stine Crime Scene
A partial fingerprint was recovered from a piece of Paul Stine's blood-soaked shirt that the Zodiac took as a trophy after the October 11, 1969 taxi driver murder in San Francisco's Presidio Heights. Despite being submitted to AFIS, the print has never been matched to a suspect.
en.wikipedia.orgZ340 Cipher — Unsolved for 51 Years
The 340-symbol cipher was mailed to the San Francisco Chronicle on November 8, 1969. It remained unsolved for 51 years until December 2020, when a team of three amateur codebreakers cracked it; the message referenced the FBI and taunted investigators.
CBS News / AP, Dec 2020 — Z340 Cipher LetterLetters to Newspapers — 37 Known Communications
The Zodiac sent at least 37 confirmed letters to Bay Area newspapers and police between 1969 and 1974, including taunting messages, ciphers, and pieces of victim Paul Stine's blood-stained shirt. Forensic linguists and handwriting experts have analyzed them extensively; no public match has been made.
CBS News / AP, Dec 2020 — SFPD Zodiac Killer BulletinLake Berryessa Survivor Descriptions
Bryan Hartnell survived the September 27, 1969 knife attack at Lake Berryessa and described the Zodiac wearing a black executioner-style hood with a crossed-circle symbol. Hartnell's eyewitness description and the message the Zodiac wrote on his car door (claiming prior victims) were key investigative evidence.
en.wikipedia.org