Episode 11 1974 In January, 1974, the Zodiac Killer broke his silence of almost 3 years mailing several new letters in the SF Bay area before his last known confirmed letter in July of that year. During his absence, people wondered and theorized about what might have happened to the bay area killer to make him go silent. Once he returned, it wasn't long before other bay area crimes were pinned on him. Follow Zodiac Speaking on Facebook at: https://www.facebook.com/Zodiac-Speaking-Podcast-105911481547105 or on Twitter at: https://twitter.com/PodcastZodiac Visit Mike Morford's Zodiac site at: https://zodiackiller.net/ And Richard Grinell's Zodiac site at: https://www.zodiacciphers.com/