How do you catch a serial killer who picks his victims at random and whose only apparent motive is to taunt the police? More than 50 years later, this question remains unanswered.

If you're a true crime enthusiast and want a clear, concise overview of the infamous murders that shook the San Francisco Bay Area in the 1960s, this short read is for you. Will we ever learn the real name of the killer shrouded by coincidences and costumes who became known only as the Zodiac?

In the late 1960s, the Zodiac Killer went on a rampage in California. To this day the case remains unsolved and the killer's identity is still unknown. Forty-eight years later, after a series of new murders and taunting ciphers uploaded to the internet gain attention, the San Francisco Police believe he's back.

This new solution to the Zodiac Killer gives shocking details about the "Halloween Card" and other details missed by law enforcement and others.

Find out what the Halloween Card means

Find out other "missed" clues in the Zodiac Investigation missed by others.