◆Part 1: San Francisco, 1968
San Francisco in 1968 was a city in the middle of its own mythology. The Summer of Love had ended the previous year. What remained was the city itself — the fog, the hills, the bay, the particular geography of a place where everything seemed possible and where the distance between neighbourhoods was measured as much in culture as in miles.
The city had no idea what was moving through it.
The first attack attributed to the Zodiac occurred on the night of December 20, 1968, near the town of Vallejo, northeast of San Francisco. David Faraday, 17, and Betty Lou Jensen, 16, were parked on Lake Herman Road in Faraday's station wagon. They were on their first date.
A gunman approached the car. He shot David Faraday in the head at close range through the driver's window. Betty Lou Jensen ran. She was shot five times in the back before she reached the road. She died at the scene. David Faraday died in hospital the following morning.
No witnesses. No shell casings recovered that led anywhere useful. No motive that investigators could identify. Two teenagers were dead and the case was open.
◆Part 2: Blue Rock Springs
On July 4, 1969, Darlene Ferrin and Michael Mageau were parked at Blue Rock Springs Park in Vallejo. It was late in the evening. A car pulled up beside them, left, then returned.
A man with a flashlight approached. He shot both of them multiple times with a 9mm pistol. He walked back to his car, paused, returned to the victims, shot them again, and left.
Michael Mageau survived. He was badly wounded and lost consciousness. When he recovered sufficiently to describe the attacker, he described a heavyset man in his late twenties with light brown or blond hair and a large face.
Darlene Ferrin did not survive. She was 22 years old. She had a husband and a young daughter.
One hour after the attack, a man called the Vallejo Police Department from a payphone two blocks from the station. He told the dispatcher he wanted to report a double murder. He provided the location. He stated that the same gun had been used in the December attack on Lake Herman Road. Then he hung up.
The caller had not given his name. He would not need to. Within weeks he would give himself one.
◆Part 3: The Letters
On August 1, 1969, three letters arrived simultaneously at three Bay Area newspapers — the San Francisco Examiner, the San Francisco Chronicle, and the Vallejo Times-Herald.
Each letter claimed responsibility for the Lake Herman Road and Blue Rock Springs attacks and provided specific details of the crimes that had not been made public — details only the killer could have known.
Each letter also contained one-third of a 408-symbol cipher. The writer demanded the newspapers publish the ciphers on their front pages or he would go on a killing rampage, doubling the number every weekend. He did not sign the letters with a name.
A fourth letter arrived at the San Francisco Examiner eight days later. In it the writer called himself the Zodiac for the first time.
The ciphers were cracked ten days after publication by Donald and Bettye Harden, a schoolteacher and his wife from Salinas. The decoded message was a stream-of-consciousness statement in which the killer described liking killing because it was so much fun and stated that he was collecting slaves for his afterlife.
The cipher gave investigators no name, no location, and no physical description that they did not already have. It gave them a voice. And the voice was not what they had expected.
◆Part 4: Lake Berryessa
On September 27, 1969, Bryan Hartnell and Cecelia Shepherd were picnicking on the shore of Lake Berryessa in Napa County when a man approached them.
He was wearing a hood with a bib attached. On the bib a symbol had been drawn in white — a cross inside a circle. It was the symbol the Zodiac had used to sign his letters.
The man told them he was an escaped convict who needed their car and their money. He produced a length of rope and tied both of them. Then he produced a knife and stabbed them repeatedly.
Bryan Hartnell survived despite being stabbed six times. Cecelia Shepherd was stabbed ten times and died from her injuries two days later.
Before leaving, the attacker walked to Hartnell's car door and wrote on it with a felt-tip pen. He wrote the dates of the previous attacks and identified them as his. He wrote KNIFE below the date of this attack. He drew the symbol from his bib.
A man called the Napa County Sheriff's Department from a payphone that afternoon. He said there had been a stabbing. He left the phone off the hook. When investigators traced the call they found the payphone. On the receiver they found a partial palm print.
◆Part 5: Paul Stine
On the night of October 11, 1969, Paul Stine, 29, was driving his taxi in San Francisco. A fare got in at Union Square. Stine drove to the intersection of Washington and Cherry Streets in the Presidio Heights neighbourhood.
He was shot once in the head with a .38 calibre pistol. The fare took his wallet, his keys, and tore a section from his shirt. Then the fare left.
Three teenagers in a nearby house saw the attacker and called the police. The police dispatcher had received the description incorrectly and broadcast a description of a black male suspect. Officers driving past a white man walking calmly away from the scene did not stop him.
The Zodiac wrote to the San Francisco Chronicle eleven days later and included a piece of Paul Stine's shirt to prove authenticity. He taunted the police for allowing him to walk past officers that night. He described their failure in specific detail.
He also made a new threat. He said he was going to do something nasty. He said he would change his method of collecting slaves. He hinted at targeting a school bus.
San Francisco school buses began receiving police escorts. The attack on a school bus never came.
◆Part 6: The Ciphers
The Zodiac sent four ciphers in total. They have defined the case as much as the murders themselves.
The first cipher, the 408-symbol message broken by the Hardens in August 1969, was the only one decoded during the investigation. It contained no useful identifying information.
The second cipher, known as the 340-cipher because it contained 340 symbols, was sent to the San Francisco Chronicle on November 8, 1969. Despite the efforts of professional cryptographers, the FBI, the NSA, and thousands of amateur codebreakers over five decades, the 340-cipher remained unbroken until December 2020.
A team of three amateur codebreakers — David Oranchak, Sam Blake, and Jarl Van Eycke — cracked the 340-cipher after identifying a transposition pattern that had been missed for 51 years. The decoded message contained no name, no address, no confession that led anywhere useful. It was a continuation of the killer's voice — taunting, self-aggrandising, and ultimately uninformative about his identity.
The third cipher, sent in April 1970 and known as the 13-character cipher, has never been solved. The fourth cipher, also sent in 1970, has never been solved.
◆Part 7: The Letters Continue
Between 1969 and 1974 the Zodiac sent at least 18 confirmed letters to newspapers and police departments. He may have sent more.
The letters varied in tone. Some were threatening. Some were boastful. Some were almost playful — the Zodiac used greetings cards, cut words from newspaper headlines, drew diagrams, attached fabric from victims' clothing.
In one letter he claimed his victim count had reached 37. Investigators have never confirmed more than 5 definitive murders. Some researchers believe the actual count may be higher. The Zodiac may have been inflating the number for effect. Or he may have been accurate.
In a letter sent in January 1974, the Zodiac referenced the film The Exorcist and gave what appeared to be an updated victim count. After that, the letters stopped.
No confirmed Zodiac communication has been received since 1974. Whether this means the Zodiac died, was imprisoned for an unrelated crime, moved, or simply stopped, nobody knows. The silence is as unexplained as the letters that preceded it.
◆Part 8: The Suspects
The Zodiac investigation has produced hundreds of suspects over more than five decades. Three have attracted serious and sustained attention.
Arthur Leigh Allen was the primary suspect of the original investigation and remained so until his death in 1992. He was identified as a suspect by a former friend who said Allen had discussed the Zodiac crimes in ways that suggested foreknowledge. He owned a Zodiac-brand watch. He had been dismissed from his job as a school janitor for child molestation. He was investigated three times by law enforcement. No physical evidence ever conclusively connected him to the crimes. DNA samples taken after his death did not match DNA recovered from the case.
Lawrence Kane was identified as a suspect through handwriting analysis and circumstantial connections to multiple Zodiac victims. He died in 2010. No conclusive evidence was ever established.
Richard Gaikowski, a San Francisco-based journalist and filmmaker, was identified by a woman who believed she recognised his voice as the voice of the caller who reported the Blue Rock Springs attack. He died in 2004. No conclusive evidence was established.
None of these men were ever charged. The case remains officially unsolved.
◆Part 9: The Investigation
The Zodiac case was complicated from the start by jurisdictional problems. The attacks occurred across multiple counties — Solano, Napa, and San Francisco. Each jurisdiction had its own investigation, its own evidence, and its own priorities.
The San Francisco Police Department, Vallejo Police Department, and Napa County Sheriff's Office were all working parallel investigations that did not always share information efficiently. The California Department of Justice eventually became involved as a coordinating body but the structural problems of a multi-jurisdictional case were never fully resolved.
Forensic techniques available in 1969 were limited. The partial palm print from the Berryessa payphone was never matched to a suspect. DNA analysis did not exist as an investigative tool. Handwriting comparisons were conducted on every serious suspect but never produced a definitive match.
The witness descriptions from the Blue Rock Springs attack, the Lake Berryessa attack, and the Paul Stine killing varied significantly. Michael Mageau described a heavyset man. The teenagers who saw the Paul Stine attacker described someone different in build and appearance. Either the descriptions were inconsistent, or there was more than one attacker, or the witnesses were simply wrong in the way that witnesses under extreme stress are often wrong.
The investigation has never closed. The San Francisco Police Department considers the Zodiac case active.
◆Part 10: The 340 Cipher Solved
On December 5, 2020, David Oranchak posted a video online. He had been working on the Zodiac's 340-character cipher for 14 years.
The solution required three people — Oranchak, who had been analysing the cipher for over a decade, Sam Blake, a mathematician in Australia, and Jarl Van Eycke, a Belgian programmer. Together they identified a complex transposition pattern that had defeated every previous attempt at decryption.
The FBI confirmed the solution was correct on December 11, 2020.
The decoded message read, in part: I hope you are having lots of fun in trying to catch me. I am not afraid of the gas chamber because it will send me to paradice all the sooner because I now have enough slaves to work for me.
It contained no name. No location. No identifying information of any kind.
The Zodiac had spent decades constructing a cipher that, once solved after 51 years, told investigators nothing they did not already know. That is either evidence of extraordinary calculation or extraordinary self-deception. Neither possibility leads to an arrest.
The remaining two ciphers have not been solved. The identity of the Zodiac has not been established. The case file, held by the San Francisco Police Department, remains open.
◆Part 11: The Confirmed Dead
The five confirmed Zodiac victims are:
Betty Lou Jensen, 16, shot December 20, 1968, Lake Herman Road, Vallejo. David Faraday, 17, shot December 20, 1968, Lake Herman Road, Vallejo. Darlene Ferrin, 22, shot July 4, 1969, Blue Rock Springs, Vallejo. Cecelia Shepherd, 22, stabbed September 27, 1969, Lake Berryessa, Napa County. Paul Stine, 29, shot October 11, 1969, San Francisco.
Michael Mageau, Bryan Hartnell, and Cecelia Shepherd were wounded at Blue Rock Springs and Lake Berryessa. Hartnell survived. Mageau survived. Shepherd did not.
The Zodiac claimed in his letters to have killed 37 people. Law enforcement has never confirmed more than 5 deaths as definitively connected to the Zodiac. A number of unsolved murders in the Bay Area during the late 1960s and early 1970s have been speculatively linked to the case. None of those links have been formally established.
Five people are confirmed dead. Five families waited for answers that have not come in over half a century. The investigation continues. The identity of the person who killed them remains unknown.
◆Part 12: The Open File
The Zodiac case has generated more books, documentaries, films, and amateur investigations than almost any unsolved crime in American history.
The 2007 film Zodiac, directed by David Fincher, is among the most forensically accurate dramatisations of a real criminal case ever produced. It captures something essential about what the investigation felt like from the inside — the accumulation of evidence that leads nowhere conclusive, the suspect who cannot be eliminated but cannot be charged, the toll that an unresolved case takes on the people who work it.
Arthur Leigh Allen, the primary suspect, died of a heart attack in 1992 at the age of 58. He was never charged. His house was searched three times. His handwriting was compared. His DNA was tested after his death. None of it produced a conclusive result.
The 13-character cipher remains unsolved. The Zodiac's full body of letters has been digitised and made available to researchers. Advances in DNA analysis have been applied to evidence recovered from the original case. No match has been established.
The San Francisco Police Department has stated that the Zodiac case remains active and that they continue to follow up leads. Whether that statement reflects genuine investigative activity or institutional obligation is not publicly known.
Five confirmed dead. One letter that changed the way a city understood itself. One cipher solved after 51 years that answered nothing. One identity never established.
The file is open. The Zodiac has never been found.