Episode 20 The Search for DNAIn this episode, Mike and Rich give a brief overview of how DNA has helped answer questions in older cases and whether it can help solve the Zodiac Killer mystery. We also explore what investigators may now be doing behind the scenes in the Zodiac case to identify the killer using his DNAFollow Zodiac Speaking on Facebook at:https://www.facebook.com/Zodiac-Speaking-Podcast-105911481547105or on Twitter at:https://twitter.com/PodcastZodiacVisit Mike Morford's Zodiac site at:https://zodiackiller.net/And Richard Grinell's Zodiac site at:https://www.zodiacciphers.com