For more than five decades, the Zodiac Killer has remained one of America’s most infamous unsolved mysteries. The unidentified serial killer terrorized Northern California in the late 1960s, taunting police with letters, secret codes, and cryptic symbols. Now, a new name has entered the discussion, and the claims surrounding it are raising fresh questions about whether the answer was hidden in plain sight all along. The case began on December 20, 1968, near Lake Herman Road in Northern California.
Two teenagers, 17-year-old Betty Lou Jensen and 16-year-old David Faraday, were attacked and killed while on what was supposed to be a normal date. David was fatally shot while trying to leave the car, and Betty Lou was shot several times in the back as she ran from the vehicle. There was no clear motive, and police initially had no idea this was the start of a much larger case. On July 4, 1969, another attack occurred at Blue Rock Springs Park in Vallejo.
Darlene Ferrin was killed, but her companion, Michael Mageau, survived despite being shot multiple times. His survival proved crucial because he was able to give police a description of the attacker as a heavyset white male with a large face and short hair. Soon after, a man called the Vallejo Police Department from a pay phone, calmly reporting the shooting and claiming responsibility for the earlier murders of Betty Lou Jensen and David Faraday. On August 1, 1969, letters were sent to three Bay Area newspapers, threatening more killings if the messages were not published.
The letters contained a strange code made of hundreds of symbols that the writer claimed would reveal his identity. A school teacher and his wife eventually solved the code at home without modern computers. The decoded message revealed a disturbing mindset, with the writer claiming that killing was exciting and that his victims would become his servants in the afterlife. Around this time, the killer began using the name Zodiac and a circular cross symbol that became permanently linked to the case.
The killer struck again on September 27, 1969, at Lake Berryessa. Two college students, Bryan Hartnell and Cecilia Shepard, were approached by a man wearing a black hood with the Zodiac symbol on it. He told them he was an escaped prisoner and needed their car and money, then tied them up and stabbed them both. Bryan survived, but Cecilia died from her injuries.
The killer wrote details of his earlier attacks on their car door before leaving, later calling police to claim responsibility. Only two weeks later, on October 11, 1969, San Francisco taxi driver Paul Stine was shot in the head by a passenger who asked to be taken to the Presidio Heights area. Several young witnesses saw the killer leave the taxi, and he took a piece of Stine’s bloodstained shirt. Police created a sketch based on witness descriptions, but a critical mistake that night allowed the suspect to walk free.
Officers had received an incorrect description over the radio telling them to look for a Black suspect, so they let a man matching the actual description walk away. Days later, a newspaper received a letter containing part of Stine’s bloodied shirt, along with the Zodiac signature. The Zodiac letters eventually stopped, but the investigation never truly ended. New detectives took over old files, and old detectives retired.
The challenge was the overwhelming volume of information. Investigators had letters, codes, photographs, witness accounts, fingerprints, palm prints, handwriting samples, crime reports, and thousands of names. A detective could spend months examining one suspect and one set of clues, and important details from earlier work could easily be lost in the process. In 2024, an artificial intelligence system was reportedly used to examine case information in a new way.
Instead of looking at one file at a time, the machine could compare names, dates, locations, writing styles, spelling habits, crime details, and other records simultaneously. According to claims surrounding the analysis, one name stood out: Gary Francis Poste. Poste was not completely unknown to investigators. His name had reportedly been considered years earlier, but he was dismissed in part because some details did not fit the image investigators had created of the killer.
His age was reportedly one of the problems. Poste was described as a house painter and former military man with experience using firearms. The alleged AI analysis reportedly found connections when pieces of information were examined together, suggesting his name had been sitting in old case records for years while investigators focused on other suspects. However, this alleged discovery is best understood as a new claim about an old suspect rather than a confirmed solution to the case.
A group of private investigators called The Case Breakers said they believed Poste was the man behind the Zodiac name. They pointed to several pieces of evidence. One of the most striking was Poste’s face, which carried deep scars from a serious car accident in 1959. The investigators compared photographs of Poste with old police drawings and said the scars appeared to be in the same places with similar shapes.
They also noted that military-style bootprints found near the Lake Berryessa attack matched the size 10. 5 boots Poste reportedly wore during his Air Force service. Poste’s military training also attracted attention. He reportedly worked with radar and had skills involving maps, numbers, calculations, communication, and patterns.
This became important because the Zodiac was known for using codes, maps, measurements, and strange symbols in his letters. The 1959 car accident that left Poste scarred also reportedly changed him. He lost all his teeth and needed several operations, and people close to him said he became colder, more distant, moody, and sometimes violent. In 1970, Poste moved to Groveland, California, around the same time the known Zodiac attacks in the Bay Area appeared to stop.
Some of the most serious claims came from people who said they knew Poste personally. Former associates reportedly described a secretive group of young men who followed him and listened to his instructions. Some claimed he taught them how to use guns and kill animals, and one former member allegedly accused Poste of ordering the killing of another man. These were extremely serious allegations, but they were never enough to officially prove Poste was the Zodiac.
Another major part of the case involved alleged confessions. According to the investigators, several people said Poste admitted he was the Zodiac before his death in 2018. The investigators claimed at least six people heard him make such statements, and three of these alleged confessions were written down in sworn statements. Poste’s marriage also became part of the mystery.
People who knew the family reportedly said the relationship was unusual, and his wife was said to have privately suspected he was hiding something dangerous but was too afraid to go to police. Now, another name has entered the discussion: Richard Hoffman, a former Vallejo police officer. The person raising the theory is Jay Foy, who says Hoffman was his grandfather. Foy did not begin looking at his grandfather because he was searching for the Zodiac.
The discovery came from his own family history. Foy had worked as a federal police officer for 10 years and served in the Marine Corps. After attending a memorial for police officers killed in the line of duty, he began thinking about his family. He wondered why he seemed to be the only person in his family who had become a police officer, and then he remembered his grandfather had also worked for the Vallejo Police Department.
Foy searched his grandfather’s name online and was surprised to find pages and discussions connecting Hoffman to the Zodiac case. He spent about 13 hours going through information without sleeping, and he began to believe his grandfather could have been the man who called himself the Zodiac. One of the first things that caught his attention was Hoffman’s appearance. Foy compared old pictures of his grandfather with witness descriptions and believed there were similarities in face, body shape, and general appearance.
He also pointed to photographs showing Hoffman wearing glasses, matching witness accounts. But Hoffman’s job is even more important to the theory. He was reportedly a police officer in Vallejo and later became a detective. That means he would have understood how police investigations worked, how officers looked for evidence, and how crime scenes were handled.
He would have known the importance of fingerprints and other clues, which could explain how the Zodiac stayed ahead of investigators. Foy also described his grandfather as strict, controlling, and very strong willed, with a strong interest in German history and a tendency to act as if he was better than women. Foy noticed another detail involving holidays. He remembered that his grandfather loved Halloween, Christmas, and Easter, which caught his attention because the Zodiac also seemed interested in special dates.
The most interesting claim, however, involves writing. Foy says he compared his grandfather’s police reports with letters believed to have been written by the Zodiac. He claims both writers made some of the same unusual spelling mistakes, with certain words repeatedly written in similar wrong ways. Foy also said his grandfather was not good at spelling and hated crossword puzzles, but he really enjoyed mathematics, numbers, and solving equations.
Foy believes this interest in numbers could have helped Hoffman create or understand the Zodiac’s ciphers. Another strange connection involves woodworking. Foy said Hoffman worked with wood and knew about materials used in woodworking. This became important because after the Paul Stine murder, investigators reportedly found gloves in the taxi but could not find useful fingerprints.
The idea discussed in the investigation is that the killer may have covered his fingerprints with a wood adhesive or similar material, and Foy believes Hoffman’s experience as a woodworker could explain this. Another unusual part of the theory concerns the 2007 movie about the Zodiac case. According to Foy, his grandfather worked as a law enforcement consultant for the film, helping explain police work and locations connected to the story. Foy finds this disturbing because if his theory is correct, Hoffman could have been helping filmmakers understand a case involving crimes he had committed himself.
The theory also goes back before the four main Zodiac attacks. Foy discusses the 1966 murder of Cheri Jo Bates, who was killed before the better known Zodiac attacks began. Some people have suggested the killing could be connected to the Zodiac, but that has never been officially proven. Foy believes several details make the case worth looking at again.
He says Hoffman had served in the Navy and had been stationed in Nebraska. Bates was also from Nebraska, and members of her family reportedly had Navy connections. A military-style footprint was found at the Bates crime scene, and a poem reportedly found beneath a desk in the library where Bates was killed was believed by Foy to look similar to later Zodiac writing. Most importantly to his theory, Foy claims the poem carried the initials RH, which could stand for Richard Hoffman.
The theory also returns to the July 1969 attack on Darlene Ferrin and Michael Mageau. Mageau survived and Foy says he has studied the original police information about the attack and has spoken with Mageau. The Zodiac later sent letters containing details about the crime, including information about the ammunition, the number of shots, and the positions of the victims. Foy believes Hoffman’s police position could have given him access to information that would help him understand how investigators worked and what details to include.
Neither Gary Francis Poste nor Richard Hoffman has ever been officially proven to be the Zodiac Killer. The alleged AI analysis, the claims from private investigators, and the family-based theory from Jay Foy all remain claims rather than confirmed solutions. The Zodiac’s identity remains officially unknown, and the unsolved codes and unanswered questions continue to keep the case alive.
