Episode Summary
Executive Summary: Michael Shermer interviews Eddie McNamara about his book arguing the Zodiac legend is a multi-author myth built by police, reporters, and later media. They dissect mythmaking around Kitty Genovese, Woodstock, Manson, and Zodiac, emphasizing base-rate thinking, police/reporting incentives, and how serial-crime narratives can obscure the actual victims and suspects.
Main Topics: Zodiac as a multi-person myth (Priority: 5/5): McNamara argues the Zodiac case was not one serial killer but a mix of murders, letter writers, and opportunists. He says the first two murders were already linked by police to local drug/deal violence, not Zodiac, and later letters likely came from multiple sources including Inspector Dave Toschi. Police, media, and careerism (Priority: 5/5): The episode stresses how investigators and journalists can amplify a legend. McNamara portrays Toschi and celebrity lawyer Melvin Belli as fame-seeking figures whose public performances helped keep the Zodiac narrative alive. Mythmaking in 1960s America (Priority: 4/5): The discussion uses Kitty Genovese, Woodstock, bra-burning feminism, and Charles Manson to show how simplified or false stories become durable cultural myths that outlast the facts. True crime vs. real crime (Priority: 4/5): Shermer and McNamara distinguish entertainment-driven true crime from the actual crimes and victims. They argue that mundane motives—jealousy, stalking, drugs, robbery—explain many cases better than grand conspiracies or serial-killer mythology. Evidence, base rates, and forensic limits (Priority: 5/5): The conversation repeatedly returns to base-rate neglect and the limitations of 1960s forensics: inconsistent suspect descriptions, weak handwriting analysis, no fingerprint matches, and letters that copied police reports rather than revealing hidden knowledge. Broader theories of violence and crime (Priority: 3/5): They briefly connect the discussion to lead exposure, environmental influences, credit access, incarceration, and social context as possible contributors to crime trends, while rejecting single-cause explanations.
Key Arguments: The first two Zodiac murders were likely unrelated to Zodiac; police reportedly knew the suspects and viewed them as local drug-related killings. The Zodiac letters likely came from multiple writers; the first set may have a single author, but later letters diverge sharply in tone, content, and style. Dave Toschi appears to have fabricated or planted stories and may have written some Zodiac-related letters, making him a careerist fabulist rather than a killer. The Kittty Genovese story is a classic media distortion: the famous bystander-effect narrative was inaccurate and has been used to malign urban communities. Woodstock and Manson were mythologized by media and culture; the public consumed simplified versions that obscured messy reality. Base-rate reasoning matters: most murders are not masterminded serial-killer puzzles but ordinary, motive-driven crimes such as jealousy, stalking, or robbery. Forensic claims about Zodiac knowledge are overstated; much of the supposed ‘inside information’ was copied from police reports or got details wrong. Celebrity and sensationalism distort true crime, rewarding books, films, and documentaries that favor a single dramatic villain over fragmented, more plausible explanations.
Data Points: 9/11 rescue duration: 9 months - McNamara says he worked rescue and recovery at Ground Zero for nine months after the attacks. Officers lost by Port Authority Police: 37 - He cites the number of his department’s officers lost on 9/11. NYPD officers lost on 9/11: 23 - He gives the NYPD fatality total during the attacks. FDNY officers lost on 9/11: 343 - He cites the fire department death toll. Kitty Genovese bystanders: 37 - The iconic New York Times version claimed 37 neighbors watched and did nothing. Psychology textbooks citing Genovese myth: 8 of top 10 - McNamara says the bystander-effect story persisted in major psychology textbooks well into the 2000s. Zodiac murders in the core case: 5 - He repeatedly distinguishes the five real victims tied to the Zodiac mythos. Murder span of core Zodiac case: Less than 1 year - The four canonical incidents occurred between Dec. 1968 and Oct. 1969. North Bay murders (Sep. 1968-Sep. 1969): 23 - McNamara says there were 23 murders in Solano and Napa counties in that period. North Bay shooting victims (same period): 28 - He adds that 28 people were shot but not killed in the same time window. Zodiac movie budget: $85 million - Shermer references David Fincher’s Zodiac as a major Hollywood production. Average 1969 man’s size: 5'8", 166 lbs - Used to contrast with the much larger Lake Berryessa suspect description. Lake Berryessa suspect description: 225-250 lbs - Brian Hartnell described the hooded attacker as extremely large. Blue Rock Springs suspect description: 5'8" and 185-200 lbs - Michael Mageau’s estimate differs substantially from the Berryessa description. Zodiac letters to newspapers: 20+ - The discussion covers a set of letters to newspapers, police, and Melvin Belli, with disputes over authorship. Brommel cab-robery timeline: Oct. 1 to mid-Jan. - McNamara says Robert Brommel’s San Francisco taxi robberies/murders overlap with the Paul Stine case. Satanic-panic era: 1980s-1990s - Used to explain the revival of Zodiac interest via sensational media and true-crime culture.
Pivotal Quotes: "Everyone was the Zodiac. No one was the Zodiac." — Michael Shermer / paraphrasing the book's thesis: Summarizing the idea that media, podcasters, and authors kept the legend alive rather than a single mastermind. "The reality is, multiple neighbors chased the attacker away. Multiple neighbors comforted Kitty." — Eddie McNamara: Correcting the popular but inaccurate Kitty Genovese bystander-effect story. "It's not a serial killer lore. It's a guy who's jealous, you know?" — Eddie McNamara: Rejecting dramatic mythmaking in favor of ordinary motives for violent crime.
Implications: Listeners are urged to distrust tidy serial-killer narratives, examine original records, and consider motive, context, and institutional incentives. The episode suggests future true-crime coverage should prioritize victims, evidence, and skepticism over sensational mythology.