Researcher since 1963 - Golden State Killer = Zodiac? Best selling True Crime author Anne Penn makes convincing case. If I had been a criminal instead of a police detective I would not want to have Anne Penn on my trail. She is a very resourceful and determined investigator who grabs hold and doesn't let go! Once again best selling True Crime author Anne Penn presents a very plausible circumstantial case that the serial slaughtering Golden State Killer - Joseph James DeAngelo - could in fact be California's notorious Zodiac killer. Short of DNA someday solving the identity of the Zodiac, Penn presents her findings of years of tracking the movements of DeAngelo and how her original research into the patterns, geography, motives, etc. before and after the Zodiac killings leads one on a journey of years into one man's serial slaughtering spree. Throughout her series of books documenting the progression of her efforts to identify the Golden State Killer, Anne has taken on a crucial role in trying to find closure for the many victims of Joseph DeAngelo - and at the same time inspire District Attorneys and Law Enforcement to take a look at the many unsolved cold cases sitting in dusty old files - based on the new evidence she is finding.