The Zodiac Killer is the pseudonym of an unidentified serial killer who operated in Northern California in the late 1960s. The case has been described as the most famous unsolved murder case in American history. It became a fixture of popular culture and has inspired numerous amateur detectives to attempt to solve it.
The Zodiac murdered five known victims in the San Francisco Bay Area between December 1968 and October 1969, operating in rural, urban and suburban settings. He targeted young couples and a lone male cab driver. His known attacks took place in Benicia, Vallejo, unincorporated Napa County, and the city of San Francisco proper. Two of his wounded victims survived. The Zodiac claimed to have murdered 37 victims. He has been linked to several other cold cases, some in Southern California or outside the state.
The Zodiac coined this name in a series of taunting letters and cards that he mailed to regional newspapers, in which he threatened killing sprees and bombings if they were not printed. Some of the letters included cryptograms, or ciphers, in which the killer claimed that he was collecting his victims as slaves for the afterlife. Of the four ciphers he produced, two remain unsolved, and one was cracked only in 2020. While many theories regarding the identity of the killer have been suggested, the only suspect authorities ever publicly named was Arthur Leigh Allen, a former elementary school teacher and convicted sex offender who died in 1992.
Although the Zodiac ceased written communications around 1974, the unusual nature of the case led to international interest that has been sustained throughout the years. The San Francisco Police Department marked the case "inactive" in April 2004, but re-opened it at some point prior to March 2007. The case also remains open in the city of Vallejo, as well as in Napa and Solano counties. The California Department of Justice has maintained an open case file on the Zodiac murders since 1969.
Murders and correspondence
Confirmed murders
Although the Zodiac claimed in letters to newspapers to have committed 37 murders, investigators agree on seven confirmed assault victims, five of whom died and two survived. They are: David Arthur Faraday, 17, and Betty Lou Jensen, 16, were shot and killed on December 20, 1968, on Lake Herman Road, within the city limits of Benicia. Michael Renault Mageau, 19, and Darlene Elizabeth Ferrin, 22, were shot on July 4, 1969, in the parking lot of Blue Rock Springs Park in Vallejo. Mageau survived the attack; Ferrin was pronounced dead on arrival at Kaiser Foundation Hospital. Bryan Calvin Hartnell, 20, and Cecelia Ann Shepard, 22, were stabbed on September 27, 1969, at Lake Berryessa in Napa County. Hartnell survived, but Shepard died as a result of her injuries a couple of days later on September 29. Paul Lee Stine, 29, was shot and killed on October 11, 1969, in the Presidio Heights neighborhood of San Francisco.
Lake Herman Road murders
The first murders widely attributed to the Zodiac Killer were the shootings of high school students Betty Lou Jensen and David Arthur Faraday on December 20, 1968 on Lake Herman Road, just inside the city limits of Benicia. The couple were on their first date and planned to attend a Christmas concert at Hogan High School, about three blocks from Jensen's home. They visited a friend before stopping at a local restaurant and driving out on Lake Herman Road, a popular area for young couples. At about 10:15 p.m., Faraday parked his mother's Rambler in a gravel turnout, which was a well-known lovers' lane. Shortly after 11:00 p.m., their bodies were found by Stella Borges, who lived nearby. The Solano County Sheriff's Department investigated the crime but no leads developed.
Using available forensic data, Robert Graysmith later speculated in his 1976 account that another car pulled into the turnout just prior to 11:00 p.m. and parked beside the couple. The killer may have exited the second car and walked toward the Rambler, possibly ordering the couple out of it. It appeared that Jensen had exited the car first, but when Faraday was halfway out, the killer shot him in the head. The killer shot Jensen five times in the back as she fled; her body was found 28 feet from the car. The killer drove off after this.