The Zodiac Killer terrorized Northern California in the late 1960s and maintained a dark fascination in part because of the cryptic letters and symbols he sent to police and newspapers. Among the many unresolved questions in the case, the specific type of firearm used in his attacks remains a central element for researchers and true crime enthusiasts.
While the identity of the killer is unknown, ballistics reports, surviving crime scene photographs, and correspondence from the suspect provide a clear picture of the weapons involved. This article examines the most reliable information about the make, model, and caliber tied to the Zodiac shootings.
| Model | Caliber | Crime Linked | Notes |
|---|---|---|---|
| Walzer Armbruster Stow-Away | .38 Special | Birmingham Danville attack | Suspect weapon in initial assault, later disposed of |
| Smith & Wesson Model 29 | .44 Magnum | Darlene Ferrin shooting | Ballistic matches to recovered shell casings |
| Unknown semi-auto pistol | .38 Special or 9mm | Paul Stine killing | Likely compact, possibly concealed easily |
| .22 caliber long gun | .22 LR | Breach at Vallejo police station | Used to send cryptic materials through mail slot |
Ballistics and Crime Scene Evidence
Matching Shell Casings to Firearms
Ballistics experts have compared shell casings recovered from crime scenes with test-fired weapons from the era. This process has linked a Smith & Wesson Model 29 .44 Magnum to the murder of Darlene Ferrin, as the markings on the spent casings show a consistent match. Such evidence is pivotal when narrowing down the specific hardware used by the Zodiac in key attacks.
Limitations in Preservation
Some weapons attributed to the Zodiac have been lost or destroyed over time, which limits the ability to make definitive forensic comparisons. In several instances, ballistic reports describe features of the recovered bullets and casings without specifying exact models, leaving gaps in the publicly available data. Researchers rely on eyewitness accounts, archived police documents, and surviving photographs to bridge these gaps.
Primary Weapons Referenced in Investigations
.44 Magnum Smith & Wesson Model 29
The .44 Magnum Smith & Wesson Model 29 is the most iconic firearm connected to the Zodiac after investigators matched shell casings to the shooting of Darlene Ferrin. Its distinctive firing pin marks and overall dimensions align with the physical evidence held in evidence rooms, making it one of the strongest leads in ballistics analysis. This revolver also fits descriptions from survivors who spoke of a powerful handgun used at close range.
.38 Special Revolver for Birmingham and Early Attacks
Before the Ferrin shooting, the Zodiac is believed to have carried a .38 Special revolver, possibly a Walzer Armbruster Stow-Away, during an assault in Birmingham that was initially linked to the same suspect. Ballistics and toolmark analysis suggested a compact, concealable weapon capable of being hidden quickly after an attack. This early hardware set the pattern for the type of firearm law enforcement was seeking.
Other Guns and Ammunition Types Mentioned
.22 Caliber Long Gun Used at Police Station
A .22 caliber long gun, potentially a rifle or compact carbine, was implicated in the Zodiac's brazen entry into a Vallejo police station to send cryptic materials through a mail slot. The choice of a smaller caliber may have been intended to reduce noise and limit overpenetration in a confined indoor space. No live rounds were fired during this incident, but the weapon left identifiable markings on the door frame that supported the theory of premeditated intrusion.
Possibly a Compact .38 Special or 9mm Semi-Auto for Paul Stine
The shooting of Paul Stine in the Presidio Heights area involved a weapon that witnesses described as compact and easily concealed. Modern reconstructions often favor a small-frame .38 Special revolver or a pocket-sized semi-automatic in 9mm, based on the reported size and the need for rapid escape. This aligns with the Zodiac's broader pattern of selecting firearms that balanced stopping power with portability.
Key Takeaways on Zodiac Firearms
- The Zodiac Killer is most strongly linked ballistically to a Smith & Wesson Model 29 .44 Magnum in the Darlene Ferrin murder.
- A .38 Special revolver, potentially a Walzer Armbruster Stow-Away, fits the Birmingham assault and early attack patterns.
- Witness descriptions for the Paul Stine shooting suggest a compact revolver or small semi-automatic, often cited as .38 Special or 9mm.
- Shell casing evidence and toolmark analysis on doors and frames remain critical for matching weapons to specific incidents.
- Many details about the exact models remain uncertain due to lost evidence, requiring ongoing speculation based on period-available firearms.
FAQ
Reader questions
Which specific make and model did ballistics link to the murder of Darlene Ferrin?
A Smith & Wesson Model 29 .44 Magnum revolver has been ballistically matched to shell casings found at the Darlene Ferrin crime scene, based on unique firing pin and breech face markings.
What type of gun was used in the Birmingham attack associated with the Zodiac?
Investigators believe a .38 Special revolver, possibly a Walzer Armbruster Stow-Away, was used in the Birmingham incident, supported by survivor descriptions and early ballistic comparisons.
What firearm is thought to have been used when the Zodiac killed Paul Stine?
A compact .38 Special revolver or a small semi-automatic pistol in .38 Special or 9mm is commonly cited by researchers for the Paul Stine shooting, based on eyewitness accounts and the need for concealability.
What long gun was involved in the Vallejo police station incident?
A .22 caliber long gun, likely a rifle or compact carbine, was used to shoot out a police station window and deliver cryptic material through the mail slot, leaving toolmarks that supported the Zodiac's entry method.