Historical true-crime feature — not breaking news. A series of attacks in Northern California during the late 1960s became linked to letters sent to newspapers by someone calling himself the Zodiac. The case remains one of the best-known unresolved criminal investigations in the United States.
The story in context
Police examined connections among several incidents while news organisations received messages and coded material claiming responsibility. Investigators treated claims carefully because an anonymous writer’s statements do not necessarily establish what crimes that person committed.
How the investigation developed
The correspondence became a major element of the public story. Some coded messages were eventually interpreted, while others generated competing claims. Law-enforcement agencies analysed handwriting, reports and possible leads, but the case has also attracted a large online culture of unsupported accusations.
Outcome and unresolved questions
The killer’s identity has not been officially confirmed. Numerous individuals have been suggested in books and media, but readers should distinguish a theory from a legal finding. Claims of a final solution deserve scrutiny unless supported by authorities and verifiable evidence.
Why the case still matters
The archive image shows part of a historical letter, not instructions to reproduce criminal acts. The FBI-headquarters photograph is merely a context image of federal investigations.
Sources and photo credits
Official or historical source. Images are historical photographs or documents, not AI-generated and not graphic. The image at the top is credited in its WordPress media-library entry.
