We've researched the case in part 1 and 2, now we are looking at investigation through astrology analysis. Dose Arthur Leigh Allen's birth chart reveal if he was the zodiac? Come find out!

The attacks were only the beginning of the investigation

After the murders, the Zodiac took his terror to the public—sending newspapers cryptic letters, coded messages, threats, and ciphers to ignite fear in these California areas.

In Part Two, we examine the Zodiac’s letters and deciphered messages, the evidence he left behind, and the psychology behind his need for attention, control, and recognition. What can his own words tell us about the person hiding behind the symbol?

And who might be the number one suspect in the case….

For decades, the Zodiac Killer has remained one of America’s most infamous unsolved cases. In this episode, we examine the crimes, victims, taunting letters, evidence, and suspects while exploring the psychology and behavioral patterns behind a killer who craved the spotlight but never revealed his identity. Will the victims and their families ever get the answers they deserve, or will the Zodiac remain a mystery for generations?