And the Hello friend.

Welcome. Hello friend, welcome back to foul play.

The individual calling themselves the Zodiac seemingly reveled in the sinister game he was playing.

For three years he had taunted and mocked police for being unable to catch him.

His letters, postcards, and ciphers were carefully designed to create more mystery.

He liked to keep the authorities in the public on edge.

He was an avid follower of the local news, acutely aware of what was written about

him, how he was described and portrayed within the media.

The narrative around his crimes was a storyline he wanted to control.

The Zodiac liked to keep a sinister tally of his kills, a number he enjoyed displaying within his communications.

By 1971 he was claiming a total of 14 murders.

14 lives he boasted about taking.

The official numbers, however, did not match.

The known murders of the Zodiac stood at five.

His admission of Riverside activity in the latest letter meant 18-year-old

Sherry Joe Bates, killed in 1966, was now likely a sixth victim.

One week after the acknowledgement of Riverside,

a new type of cryptic puzzle began to make its way toward the San Francisco Chronicle.

A communication left open to interpretation

as to its meaning and its significance. On March the 22nd, 1971, Paul Avery received a further communication at the San Francisco

Chronicle directly from the Zodiac. His surname was misspelled, but there was no doubt

he was the intended recipient. At the top left corner was a circle with the word zodiac written above it.

...