Why was the Zodiac Killer named the Zodiac Killer?

Answer 1

This was a name that the killer chose for himself. No specific reason was ever given why but many have speculated on various reasons why he may have chosen this name. Because of the timing of his attacks and letters he apparently understood Astrology.

The killer is thought to have modeled certain elements of his MO upon the villain of Charlie Chan at Treasure Island (1939). The villain of this film was named Zodiac, taunted the police and had many other similarities.

According to the bestseller Zodiac by Robert Graysmith the Zodiac may have based his name on a character in a book called The Most Dangerous Game. This book was published in 1924 and the villain of the story was named General Zaroff. A movie with the same name was made in 1932.

On August 1, the Vallejo Times-Chronicle, the San Francisco Examiner and the San Francisco Chronicle received near-identical letters from the Zodiac in which he took credit for the murders, proving his guilt by stating several facts about the crime scenes, such as what the victims were wearing, how their bodies were positioned and what brand of ammunition he used. The only signature was the Zodiac's symbol.

Answer 2

He came up with it all on his own as far as anyone can tell. The Zodiac was a busy letter writer. Most of his letters were sent to the San Francisco Chronicle newspaper and he began many of then with the opening phrase "This is the Zodiac speaking." His signature was a crossed-circle like a gun site. He had a flare for the dramatic. It got attention, which is what he wanted.

Interesting fact: The Zodiac had qualities of Jack The Ripper, with his letter writing and taunting the police and press. Not to mention that neither were ever caught.

Answer 3

The killer gave himself that name in letters he wrote to police and press. His cyphers also contained atrological signs and symbols.

Answer 4

The Zodiac Killer was never apprehended. There have been over 2,500 suspects but not one of them has ever been arrested. So no one knows his true identity.