The Zodiac Killer: A Gruesome San Francisco Mystery

At 10:13 p.m. on October 11, 1969, a call came into the San Francisco Police Department reporting a cab driver shot dead at the corner of Washington and Cherry Streets, in the affluent Presidio Heights neighborhood. The killer had calmly wiped down the vehicle, removed something from the victim’s body, and walked away into the night, leaving behind a blood-stained scene and a city seized by fear.

Paul Stine, the victim, was 29 years old. He worked as a cab driver, picking up fares across San Francisco to support himself. Stine had a reputation for reliability. That evening, he picked up a passenger in the theater district. Stine noted in his logbook that the destination was at the intersection of Washington and Maple Streets, but the cab stopped one block further, at Washington and Cherry.

The man who entered Stine’s cab that night was described as a white male, about 35 to 45 years old, heavyset, with reddish-brown hair. Witnesses later said the man was wearing glasses and a dark jacket. Three teenagers watched from a window across the street as the cab rolled to a stop. They saw the passenger reach forward from the back seat and shoot Stine in the head at close range. They watched as the killer leaned over the slumped driver, rifled through the body’s pockets, and tore a piece of fabric from Stine’s shirt. The killer wiped down areas inside the cab, exited the car, and, with apparent calm, walked north on Cherry Street, disappearing into the dark.

Minutes later, patrol officers arrived. The teenagers gave a description and pointed out the direction the killer had gone. But a miscommunication between dispatch and the responding officers broadcast the suspect as a Black male, not white. As a result, police officers driving through the area briefly stopped a man walking away from the crime scene, but let him go because he did not match the incorrect description. The man they stopped may have been the Zodiac Killer.

The Zodiac Killer had already terrorized Northern California for nearly a year by the fall of 1969. His first confirmed murders took place on December 20, 1968. David Faraday, 17, and Betty Lou Jensen, 16, were shot and killed while parked along Lake Herman Road in Benicia, a quiet suburb northeast of San Francisco. The two teenagers had planned a simple date night—just a drive and time together before the holidays. Their car was found with the windows shattered, shell casings on the ground, and both victims shot at close range.

Six months later, on July 4, 1969, Darlene Ferrin, 22, and Michael Mageau, 19, were sitting in a parked car at Blue Rock Springs Park in Vallejo, just a few miles from the first crime scene. It was around midnight. A car pulled up beside them, drove away, and then returned. The driver got out and shined a flashlight into their car. Without saying a word, he began shooting. Ferrin died; Mageau survived, despite being shot in the face, neck, and chest.

Within an hour of the Blue Rock Springs attack, the Vallejo Police Department received a call from a payphone. The caller spoke in a measured tone, claiming responsibility for both attacks. He described the locations and details only the killer would know.

On August 1, 1969, three major newspapers in the Bay Area received nearly identical letters from the Zodiac. Each contained one third of a cipher—a cryptogram made up of 408 symbols, promising a revelation if solved. In the letters, the Zodiac threatened to kill again if the ciphers were not published on the front pages. Law enforcement and cryptographers rushed to decode the messages. Donald and Bettye Harden, a high school teacher and his wife in Salinas, solved the 408-symbol cipher within a week. The message was chilling: the writer described murder as “more fun than killing wild game in the forest,” and claimed he was collecting slaves for the afterlife. The cipher did not contain the killer’s name, as he had implied.

On September 27, 1969, Bryan Hartnell, 20, and Cecelia Shepard, 22, were picnicking at Lake Berryessa in Napa County. In broad daylight, a man approached them wearing a black executioner’s-style hood, with clip-on sunglasses and a white crossed-circle symbol on his chest. He carried a gun, ordered the couple to lie face-down, tied them with plastic clothesline, and then stabbed them repeatedly with a long knife. Hartnell survived; Shepard died two days later. The attacker walked back to Hartnell’s car and drew the crossed-circle symbol, along with the dates of previous attacks and the words “by knife,” on the car door in black felt-tip pen. Thirty minutes later, a man called the Napa County Sheriff’s Office from a payphone to report the crime, speaking in a calm, monotone voice.

After the murder of Paul Stine, the Zodiac sent a letter to the San Francisco Chronicle. Inside was a torn section of Stine’s blood-soaked shirt. The letter began, “This is the Zodiac speaking.” He claimed responsibility for the cab driver’s murder and threatened to target school children as his next victims.

Over the next several months, the Zodiac sent more letters, taunting police and the media. On November 8, 1969, he mailed a card with a new cryptogram—340 characters long. The 340-character cipher remained unsolved for over 50 years, until a team of amateur cryptographers cracked it in 2020. The decoded message taunted law enforcement, admitted to enjoying killing, and refuted claims that he was afraid of the gas chamber.

On December 20, 1969, the Zodiac sent another letter, this time claiming responsibility for the murder of a woman near Lake Tahoe. This claim remains unverified, and the case was never definitively linked to the Zodiac.

On March 22, 1970, Kathleen Johns was driving near Modesto, California, with her infant daughter. A man waved her down, claiming her tire was loose. He offered her a ride after her car was disabled, but then drove her around in circles for several hours. Johns escaped with her child and later identified her abductor as the Zodiac from police sketches.

The Zodiac’s letters displayed a mix of deliberate misspellings, odd grammar, and cryptic references. He sent over 20 letters in total, many to the San Francisco Chronicle, Vallejo Times-Herald, and San Francisco Examiner. The letters often included pieces of evidence from the crimes, cryptograms, and threats against specific individuals, including reporters such as Paul Avery. On October 27, 1970, the Zodiac sent a Halloween card to Avery, signed with the letter “Z” and a threat on the inside.

Police departments across Northern California—including the San Francisco Police Department, Napa County Sheriff’s Office, and Vallejo Police Department—mounted a massive investigation. Hundreds of detectives were assigned to the case. Composite sketches based on witness descriptions were circulated widely. The FBI joined the hunt, providing forensic and criminal profiling support.

Physical evidence collected included shell casings, bullets, fingerprints, and the fragments of Paul Stine’s shirt. Police obtained partial fingerprints from the cab’s dashboard after Stine’s murder. The prints did not match any of the main suspects, nor did they lead to a positive identification.

The Zodiac changed his methods frequently, alternating between guns and knives, and attacking both couples and single victims. This unpredictability hampered efforts to establish a clear pattern or psychological profile. According to FBI profiler Gregg McCrary, “The killer constantly changed his method of operating and openly admitted that murder was sport for him.”

One of the most significant missed opportunities occurred minutes after the murder of Paul Stine. Officers Eric Zelms and Donald Fouke were patrolling the area when they saw a man walking away from the crime scene. Due to the incorrect broadcast that the suspect was Black, they did not detain the white male they encountered. The man matched the later composite sketch of the Zodiac.

In the days following each attack, the Zodiac often called police departments himself using nearby payphones. His calls were brief, monotone, and included specific details about the crimes, confirming his identity as the perpetrator. After the Blue Rock Springs shooting, he called the Vallejo Police Department from a phone booth only a short distance from the station, describing the murder and taking credit for the previous attack on Lake Herman Road.

The killer’s cryptograms captivated the public and authorities alike. The first, the 408-symbol cipher, was solved quickly. It detailed the killer’s supposed motives and fascination with murder. The second major cipher, the 340-character code, eluded solution until December 2020, when David Oranchak, Sam Blake, and Jarl Van Eycke cracked the code using custom software and manual analysis. The message again contained boasts and threats, but no clues to the killer’s identity.

Two other ciphers remain unsolved. The Zodiac’s effort at coded communication generated intense media and public interest, turning the case into a national obsession. Amateur sleuths, cryptographers, and law enforcement agencies have spent decades attempting to break the unsolved codes.

The Zodiac’s identity has never been confirmed. Police investigated hundreds of suspects, but none were charged or definitively linked to the murders by physical evidence. The case files include thousands of pages of interviews, forensic reports, and letters. Even after the last confirmed Zodiac communication was received in January 1974—a letter referencing the film “The Exorcist”—no credible leads emerged.

The presiding officer on the Paul Stine case noted that the killer had the composure and presence of mind to clean up the scene and remove evidence in a matter of minutes. The fragment of Stine’s shirt sent to the Chronicle confirmed that the killer had been at the scene, and that his communications were genuine.

The Zodiac’s habit of misspelling words, using odd syntax, and making deliberate grammatical errors in his letters may have been intended to mislead investigators about his background and education. Experts have debated whether these anomalies were a disguise or revealed genuine traits about the killer’s psychology.

The geographical spread of the attacks—Benicia, Vallejo, Napa County, and San Francisco—complicated jurisdictional coordination. At the time, information-sharing between police departments was slow and inefficient.

The Zodiac claimed, in his letters, to have killed as many as 37 people, but police have only linked five murders and two attempted murders to him with certainty. The gap between claimed and confirmed victims has fueled speculation about additional crimes and possible copycat cases.

No murder weapon was ever conclusively recovered. The killer used different calibers in separate attacks, ranging from a .22 to a 9mm, and switched to a knife for the Lake Berryessa stabbings.

The Zodiac’s attack at Lake Berryessa was the only time he was known to have worn an elaborate costume. The executioner’s hood and crossed-circle chest symbol were unique among American serial killers, suggesting a fascination with theatricality and ritual.

The Halloween card sent to Paul Avery, a Chronicle reporter covering the case, included the phrase “Peek-a-boo, you are doomed.” The card and its threat contributed to a climate of paranoia among journalists and investigators.

The San Francisco Police Department has stated that the Zodiac case remains open and unsolved. Despite advances in forensic science, including DNA testing, no conclusive link has been established to any suspect. The partial fingerprints and DNA traces from the crime scenes have failed to produce a match in national databases.

The Zodiac case is one of the few in American history where the killer openly corresponded with authorities and the public, manipulating the investigation and shaping public perception through the media. His communications included maps, ciphers, and threats, drawing in amateur and professional sleuths for decades.

The Zodiac’s crimes forced Bay Area law enforcement agencies to rethink coordination and information-sharing. The case highlighted the limitations of forensic technology in the late 1960s and 1970s, as well as the challenges of tracking a mobile, unpredictable offender operating across multiple jurisdictions.

The unsolved ciphers sent by the Zodiac continue to attract cryptographers, codebreakers, and enthusiasts, with new attempts to decode them emerging each year.

The Zodiac’s case file includes over 2,500 suspects investigated, thousands of tips received, and hundreds of pieces of physical evidence cataloged.

On March 13, 1971, the Zodiac sent a letter to the Los Angeles Times claiming responsibility for a recent murder in Southern California, though police found no evidence linking him to the crime.

The last known letter from the Zodiac arrived on January 29, 1974, referencing “The Exorcist,” which was released in 1973. After that, communications stopped.

The Zodiac’s crimes occurred at a time when media coverage of serial murders was becoming a national phenomenon, fueling a wave of fear and speculation across the country.

Despite decades of analysis, the Zodiac’s true name, motive, and fate remain completely unknown.