Brandon talks with Karen Dill, who not only went to school with Lance in Chicago's Austin neighborhood, but visited him in the summer of 1970 while he was living in the Bay Area. Plus, there are deep dives on "gimmick rallye" car events, the psychological profile and training of the Zodiac and/or Lance, the emergence of another through-line, the importance of fantasy for serial killers, an eerie and anonymous tip, more classified ads, another victim with startling links to Antoinette Anino, and a jaw-dropping discovery in the Kristin David Case.