The Hunt for the Zodiac Killer

It’s one of the most complex codes in history, rivalling the Rosetta Stone and Enigma in its brilliance. Its author is unknown. He’s called Zodiac - a serial killer who terrorised San Francisco in the late 1960s. Zodiac killed five men and women, then left bizarre ciphers as breadcrumbs. Although studied by advanced criminal justice experts at the time, only 25% of his ciphers were ever decoded. Now, LAPD homicide detective Sal LaBarbera will work with a codebreaking team and FBI investigators to hunt down Zodiac. The key: a groundbreaking new technique called a Double Helix Investigation. Working with UCLA master codebreaker Kevin Knight, they’ll take a novel approach to catching Zodiac - break the man, you’ll break the code. With DNA compositing, new information about Zodiac’s behaviours, and facial recognition technology, Sal, Ken, and the team of codebreakers are using their expertise to bring the most mysterious and vicious killer in US history into the light. (History Channel)