As grisly as the murders were, perhaps the most intriguing element of the Zodiac's modus operandi, according to History.com, ...

Netflix's docuseries This Is the Zodiac Speaking provides new insights into the unresolved case of infamous Zodiac Killer.

The Zodiac Killer was known for sending cryptic letters about his crimes to newspapers and police, per the San Francisco Chronicle. These letters often included ciphers and coded messages.

The Zodiac killer is one of the most notorious killers of all time, but has never been caught. Now, a family who knew the prime suspect Arthur Leigh Allen have come forward for the first time in the ...

While elements of the zodiac killer’s crimes have been solved, including several of the ciphers he sent to the media, others ...

the killer and their unsolvable ciphers are still puzzling sleuths more than 60 years later. According to the San Francisco Chronicle, which was the recipient of 17 of the 22 letters the Zodiac is ...

A new Netflix documentary about the Zodiac killer explores one of the most famous unsolved murder cases in the country — and ...