Links:
Website by Dave Oranchak which has a lot of useful and factual information on it.
https://zodiackillerciphers.com/
Cipher Explorer: the following is a link in which you can play around with some of the ciphers
https://zodiackillerciphers.com/cipher-explorer/
Zodiac Killer Facts by Micheal Butterfield
https://zodiackillerfacts.com/
Youtube Channel for Dave Oranchak: Lets Crack Zodiac Series
https://www.youtube.com/@doranchak
Zodiac Killer Basement: The following link is a great resource for official documents from Zodiac Killer Researcher Dion Walker:
Communities and Forums:
Facebook:
https://www.facebook.com/groups/ZodiacKillerCommunity
https://www.facebook.com/groups/1987982334820534
Zodiac Killer Library Facebook Group
https://www.facebook.com/groups/153379356402251/
Reddit: