This documentary is the primer for anyone wanting to understand the timeline of events from the perspective of the public and law enforcement. It does not attempt to solve the case or lean to a particular suspect. It is well researched and edited and the production is excellent. It is a very straight forward and well curated synopsis of the entire case. No sensationalism or speculation just a great historical recap. If you are new to Zodiac start here because much of what is available out there is highly biased and poorly researched content designed to attract views. Great job!