Case File № 007
Who Was the Zodiac Killer? The Named-Suspect Theories¶
TL;DR¶
Is the Zodiac's identity secretly known? On the evidence, no — and there is no documented cover-up either. The Zodiac murdered at least five people in Northern California in 1968–69, taunted police with letters and ciphers, and was never caught. Over the decades three named suspects have dominated: Arthur Leigh Allen (the police's long-time prime suspect, made famous by Robert Graysmith's books and the 2007 Fincher film), Gary Francis Poste (named in 2021 by a private group, the "Case Breakers"), and Earl Van Best Jr. (named by his own estranged son in a 2014 book). Each rests largely on circumstantial resemblance, contested handwriting, or arbitrary cipher "decodings"; none is backed by a forensic match. The case remains officially open and unsolved — a degraded-evidence cold case, not a suppressed solution.
The Steelman¶
The strongest form of the "we know who the Zodiac was" position is not one theory but the best parts of three, plus a base-rate argument.
Arthur Leigh Allen. Allen is the suspect with the deepest documented file. A former friend, Don Cheney, told police in 1971 that before the murders Allen had spoken of wanting to kill people, of using the name "Zodiac," of attaching a flashlight to a gun to shoot in the dark, and of writing taunting letters to police. On the day of the Lake Berryessa attack, Allen — by his own account — was in the area (he said he went diving at nearby Salt Point) and admitted having bloody knives in his car. He wore a "Zodiac"-brand wristwatch bearing a crosshair-style logo resembling the killer's signature symbol. In 1991, Blue Rock Springs survivor Michael Mageau picked Allen out of a photo lineup and said, "That's him." Lead SFPD inspector Dave Toschi once called Allen "a very, very good suspect." [12][15]
Gary Francis Poste. In October 2021 the Case Breakers — a self-described group of some 40 ex-investigators and journalists led by Thomas Colbert — named Poste, an Air Force veteran and housepainter who died in 2018. Their pillars: forehead scars they say match marks on the 1969 police composite; an anagram method that they say lifts "Gary Francis Poste" out of Zodiac's cipher text; and a claimed link to the 1966 murder of Cheri Jo Bates in Riverside. [8][3]
Earl Van Best Jr. In The Most Dangerous Animal of All (2014, HarperCollins), Gary L. Stewart argued that the Zodiac was his own biological father, who abandoned him as an infant. His pillars: a document examiner he hired (Mike Wakshull) who said he was "virtually certain" the same hand wrote a 1962 marriage certificate and the Zodiac letters; a claimed physical resemblance to the sketch; and a claimed fingerprint and DNA correspondence. [10][13]
The base-rate argument. Real conspiracies and police failures happen; serial killers do get identified decades late by new forensics (the Golden State Killer was caught in 2018 via genetic genealogy). So the prior that the Zodiac is identifiable — and that institutional inertia, not impossibility, explains the open file — is not absurd. The strongest documented sub-claims the evaluation must meet head-on are: Cheney's pre-murder report about Allen, Mageau's 1991 identification, and whether the available DNA can identify anyone at all.
Background & Origin¶
The Zodiac attacked couples and a cab driver around the San Francisco Bay Area between December 1968 and October 1969, then sent letters, ciphers, and a crosshair symbol to Bay Area newspapers, at one point posting a taunting "score" claiming 37 victims to the police's zero (only five murders — Faraday, Jensen, Ferrin, Shepard, and Stine — are confirmed; Mageau and Hartnell survived). [10] Two other episodes are part of the canon but disputed: the 1966 murder of Cheri Jo Bates in Riverside (which Riverside PD says was not the Zodiac's work) and the 1970 abduction of Kathleen Johns (whom the Zodiac referenced in a later letter). The "claimed up to 37" figure is a letter-writer's boast, not a documented body count. [10][8]
The named-suspect field is also wider than the three theories this report litigates. Long-circulating enthusiast candidates include Lawrence "Larry" Kane (whom abduction survivor Kathleen Johns and Darlene Ferrin's sister reportedly identified, and whom the SFPD officer who saw the Stine-scene suspect, Don Fouke, is said to have considered the closest resemblance he'd seen), Ross Sullivan (linked to the Bates case, with a military-boot fit to the Berryessa print), Richard Gaikowski (archivist Tom Voigt's preferred suspect), and Jack Tarrance (named by his stepson Dennis Kaufman in 2007). None has a forensic match either. That so many mutually-exclusive "the Zodiac was ___" cases coexist, each anchored in resemblance and circumstance rather than evidence, is itself a fact the identity theories must reckon with. [8]
Allen became the focus in 1971 after Cheney came forward; he was searched, interviewed, and surveilled for two decades but never charged, and died in 1992. Graysmith's Zodiac (1986) and Zodiac Unmasked (2002), and the 2007 David Fincher film, cemented Allen in the public mind. [12][15]
Stewart's Van Best theory arrived with a 2014 bestseller and a 2020 FX docuseries — whose own finale undercut it. The Poste theory broke in October 2021 as a media event built around the Case Breakers' press release, amplified by tabloid and local-TV reposts and quickly rejected by law enforcement. [3][8] The broader "the FBI secretly knows / is covering it up" strand traces almost entirely to the Case Breakers' later writings. [16]
A pivotal modern inflection point cuts against all the identity claims: in December 2020, an international team — David Oranchak, Sam Blake, and Jarl Van Eycke — solved the 51-year-old "340" cipher, with the FBI confirming the solution. The plaintext contained taunts but no name. [7][11]
The Claims, Examined¶
Claim 1: Arthur Leigh Allen was the Zodiac¶
- Verdict: Insufficient evidence
- Confidence: Low
- Evidence for: Cheney's 1971 report of incriminating pre-murder statements; Allen's own admission of being near Lake Berryessa with bloody knives; the "Zodiac" watch with a crosshair logo; Mageau's 1991 lineup identification; seizure in searches of a typewriter, ammunition, and a knife "similar to" Zodiac-linked items; Toschi's early "very good suspect" comment. [12][15]
- Evidence against: Every forensic test that could implicate Allen failed to. The California Department of Justice's chief questioned-documents examiner, Sherwood Morrill — the state's authority on the Zodiac writing — concluded Allen's handwriting did not match, and held the killer used his own natural hand. Retired examiner Lloyd Cunningham said in 2009 that "none of [Allen's] writing even came close to the Zodiac." A 2002 partial DNA profile from a Zodiac letter (developed by SFPD criminalist Dr. Cydne Holt) excluded Allen. His fingerprints did not match latent prints from the Stine cab scene. An eyewitness officer (Donald Fouke) said Allen was ~100 lbs heavier than the man he saw; a dispatcher who took a Zodiac call said Allen didn't sound like the caller. Allen passed a 1971 polygraph. Toschi later (2010) said the evidence against Allen "turned out to be negative." [12][6][15]
- Inference check: The "for" case is a stack of circumstantial and testimonial items, several of which are weaker than they first sound — this is anomaly-hunting: the watch was a common consumer brand (a Christmas gift; his brother got an identical one), and there is no documentary proof Allen ever owned the "Wing Walker" military boots whose print appeared at Berryessa (the lone sighting surfaced only after Graysmith's book made the link). Cheney's report is single-source and emerged after a falling-out. Crucially, though, the forensic "against" evidence is not a clean exoneration either: the 2002 profile is partial, and it is not confirmed the recovered DNA is the killer's (it may have come from the outside of a stamp handled by many people), and the Stine prints may not be the killer's. Handwriting comparison is also a non-validated discipline. So the honest reading is neither "proven" nor "cleared" — it is unresolved, with every forensic test ever run on Allen coming back exculpatory or null and none inculpatory, and the weight of qualified handwriting opinion against him. (Confidence is Low precisely because the record is genuinely torn: several of the most consequential "against" quotes — Morrill's and Cunningham's handwriting exclusions, Toschi's later reversal — are best documented through an independent researcher, Michael Butterfield, who argues a clear "not Allen" thesis; the mainstream-anchored facts are the DNA exclusion and fingerprint non-match.)
- Sources: [12][15][6]
Claim 2: Gary Francis Poste was the Zodiac (the 2021 "Case Breakers" claim)¶
- Verdict: Contradicted
- Confidence: High
- Evidence for: Forehead scars said to match the 1969 composite; an anagram extraction of Poste's name from cipher text (by Dale Julin, a TV news anchor, who said an NSA codebreaker endorsed it); a claimed tie to the Cheri Jo Bates murder. [8][3]
- Evidence against: The FBI stated the day after the announcement that the case "remains open and unsolved" and there was "no new information to report," declining to endorse the identification. Riverside PD said it is "100% sure" the Zodiac did not kill Bates — and the one concrete handwriting finding in that case points to a teenager who admitted in 2016 to writing a 1967 Bates "confession" letter as a hoax (FBI-confirmed handwriting; "neither Bates' killer nor the Zodiac"). The leading Zodiac archivist Tom Voigt called the scar claim baseless, noting witnesses preferred the amended sketch, which had no such marks. No DNA, handwriting, or physical evidence ties Poste to the killings. [3][8][5]
- Inference check: The anagram pillar is a textbook case of unfalsifiability/arbitrary pattern-matching. David Oranchak — who actually solved the 340 cipher — showed that a short letter string yields 400+ extractable English words, so an anagrammer can "find" almost any preconceived name; the method is non-unique and cannot be shown wrong. Julin also declined to disclose his method, the opposite of the transparent, FBI-verified 340 solution, and the claimed "NSA endorsement" was never substantiated. The scar and Bates pillars collapse on the primary record. [9][3] (What is Contradicted is the Case Breakers' specific identification — its pillars don't hold up; no DNA test of Poste against Zodiac evidence was ever run, so this is "the claim fails," not "Poste was forensically excluded as a person.")
- Sources: [3][8][5][9]
Claim 3: Earl Van Best Jr. was the Zodiac (the "Most Dangerous Animal of All" claim)¶
- Verdict: Contradicted
- Confidence: High
- Evidence for: Stewart's hired examiner (Wakshull) said he was "virtually certain" the writer of a 1962 marriage certificate also wrote the Zodiac letters; a claimed resemblance to the sketch; claimed fingerprint and DNA correspondences; a cipher "decode" yielding "Earl Van Best Junior." [10][13]
- Evidence against: The handwriting pillar collapsed when researcher Mike Rodelli established that the marriage-certificate handwriting belonged to the officiating minister (Rev. Edward Fliger), not Van Best — and Wakshull himself conceded this in a 2014 call, leaving only three Van Best signatures, far too little for any conclusion. A letter from Van Best's other child placed him in Europe through 1971, making the 1968–69 murders impossible. The "fingerprint" was not among those officially flagged as Zodiac prints and required reversing the image to align a possible scar. The FX docuseries' fact-checkers found Stewart had fabricated parts of his father's criminal record and deceived his co-author; his "Zodiac DNA" was reconstructed by eyeballing a graphic on a TV program — a mock-up, not a real profile. The Europe alibi and the documentary's self-debunking (its director and investigator concluded Van Best was not the Zodiac) are confirmed in mainstream reporting; the granular handwriting-concession chain is best documented by independent researchers. [18][13][14][10]
- Inference check: Multiple failure modes at once — circular sourcing (the examiner treated the Zodiac letters as the "known" sample and the certificate as "questioned," then reasoned backward), fabrication, and the same arbitrary cipher extraction Oranchak debunked by producing alternative "names" (Earl Van Cook Junior, Earl Van Bell Junior) from the identical method. With a documented alibi and a fabricated evidence trail, the theory fails on the facts, not merely on inference. [13][9]
- Sources: [18][13][14][10][9]
Claim 4: The Zodiac's identity is secretly known and being covered up¶
- Verdict: Contradicted
- Confidence: High
- Evidence for: The Case Breakers allege the FBI quietly listed Poste as a suspect from 2016, held a partial DNA sample at Quantico, and "concealed" evidence. [16]
- Evidence against: Every agency with jurisdiction has publicly said the opposite. The FBI calls the case open and unsolved with no new information; SFPD treats incoming tips (3–4 a week) without having confirmed any suspect; Riverside PD publicly contradicts the Bates linkage the cover-up story leans on. The documented reason for non-resolution is forensic: 50-plus-year-old degraded evidence, a partial DNA profile of uncertain provenance, and ciphers (Z13, Z32) too short to solve uniquely. Tellingly, the same genetic-genealogy route that caught the Golden State Killer was actually tried here — Vallejo PD submitted Zodiac letter evidence to a private lab in 2018 and obtained a partial profile by 2019 — and it stalled precisely because the recovered DNA was too partial to build a usable genealogical profile. That is the signature of a hard case, not a hidden one. [10][4][3][7]
- Inference check: This is establishment-dismissal-as-confirmation — treating each official denial as proof of the cover-up, which makes the claim unfalsifiable. There is a real, mundane alternative (an old, evidence-poor cold case) that explains the facts at least as well, and no primary document shows suppression. "No arrest" is not evidence of concealment. [4][16]
- Sources: [4][16][3][7]
Competing Hypotheses¶
- H1 — Officially unsolved cold case (mainstream). The Zodiac was a real, never-identified offender; degraded evidence and short ciphers keep the case open.
- H2 — A specific named suspect did it (Allen / Poste / Van Best / others). These compete with each other as much as with H1; confirming any one would resolve the case.
- H3 — The identity is known and suppressed (cover-up).
The weight of evidence fits H1. The most diagnostic single fact is the 2020 cipher solution: an independent team cracked the 340 cipher and the FBI confirmed it — yet it contained no name, which is hard to square with either "we already secretly know" (H3) or any specific named-suspect proof (H2). The forensic record is the other discriminator: handwriting, fingerprints, and DNA have excluded the most-tested suspect (Allen) rather than confirming anyone, and no suspect has ever produced a forensic match.
| Key evidence | H1 unsolved | H2 named suspect | H3 cover-up |
|---|---|---|---|
| 340 cipher solved (2020) contains no name | ✓ | ✗ | ✗ |
| Handwriting experts exclude Allen | ✓ | ✗ | ~ |
| 2002 DNA profile excludes Allen, is partial, identifies no one | ✓ | ✗ | ~ |
| No forensic match to any named suspect | ✓ | ✗ | ~ |
| FBI/SFPD/Riverside PD say case open, reject specific claims | ✓ | ✗ | ✗ |
| Anagram "name" decodes are arbitrary/non-unique | ✓ | ✗ | ✗ |
H2 fails because no candidate is backed by a forensic match and the lead cases each break on documented points (Allen's handwriting/DNA exclusions; Van Best's alibi and fabrication; Poste's arbitrary anagram and rejected Bates link) — and because the sheer number of mutually-exclusive "it was definitely ___" cases (Allen, Poste, Van Best, Kane, Sullivan, Gaikowski, Tarrance…), each built on resemblance and circumstance, is itself evidence that none has crossed the threshold from suspect to proof. H3 fails because there is no primary evidence of suppression and a simpler explanation accounts for the same facts.
Overall Verdict¶
The honest answer to "do we secretly know who the Zodiac was?" is no — and there is no documented cover-up. The case best fits the mainstream account: a real, never-identified killer whose trail went cold and whose physical evidence has degraded.
What the theories get right (the conceded kernels): Allen genuinely was the police's most-investigated suspect for good circumstantial reasons, and the forensic tests that "cleared" him are themselves imperfect — so "Allen is ruled out with certainty" would overstate the record as much as "Allen did it" does. Insufficient evidence, not exoneration, is the fair call on Allen. Cold cases do get solved by new forensics, so the possibility of a future identification is real.
What they get wrong: the Poste and Van Best identifications are contradicted by documented facts (an alibi, a fabricated evidence trail, an arbitrary anagram method, and law-enforcement rejection of the Bates link). The "cover-up" framing is contradicted by the consistent public position of every agency involved and by the absence of any suppression evidence.
What actually happened: Between December 1968 and October 1969 an unidentified man killed at least five people around the Bay Area and taunted authorities with letters and ciphers. He was never caught. Decades of investigation produced one heavily-scrutinized but never-charged suspect (Allen, who died in 1992) and a string of later claims that don't survive scrutiny. In 2020 a volunteer team cracked his last major readable cipher (the FBI confirmed the solution) — and it named no one. When investigators tried the genetic-genealogy techniques that cracked other cold cases, the remaining physical evidence proved too partial and of too uncertain origin to yield a usable profile. The case is open because it is hard, not because it is hidden.
Where I Could Be Wrong¶
- "Unsolved" is a statement about today, not forever. Forensic genetic genealogy caught the Golden State Killer in 2018 from old evidence many assumed was useless. Investigators have already tried the same approach on the Zodiac letters (Vallejo PD, 2018–19) and it stalled on the poor quality of the DNA — but lab techniques keep improving. If someone ever pulls a fuller profile, and if that DNA really is the killer's, the picture could change fast. My verdict is about the evidence as it stands, not a prediction.
- The forensic exclusions of Allen are softer than they look. The much-cited DNA "non-match" rests on a partial profile, and no one has ever proven the tested DNA came from the killer rather than from a stamp handled by postal workers or others. Someone determined to keep Allen in the frame can fairly say he was never cleanly cleared — only never confirmed. I've tried to reflect that by calling Allen "insufficient evidence" rather than "contradicted."
- The strongest proponent point I had to overcome was Michael Mageau's 1991 identification of Allen — a surviving victim naming the man. I weighted it down because it came 22 years after a split-second nighttime glimpse, the witness rated his own certainty at 8/10 and flagged a second photo too, and the Vallejo police did not treat it as valid. Reasonable people can weight an eyewitness ID more heavily than I did.
- Sources I leaned on have a point of view. Much of the granular suspect detail comes from independent Zodiac researchers (notably Michael Butterfield's site and David Oranchak's cipher work). They are knowledgeable but not neutral institutions, and Butterfield in particular argues a clear thesis that Allen was not the killer. Where I could, I anchored the load-bearing facts to mainstream reporting and to official statements instead.
- A couple of the cited news pages were hard to retrieve directly (a paywall in one case), so for a few quotes I relied on the same wording as carried by other outlets. The FBI's exact phrasing, in particular, reached me through major news organizations quoting it rather than from the bureau's own page.
Sources Cited¶
- (reserved)
- (reserved)
- "Very strong suspect named in Zodiac Killer case by cold case group." KTVU FOX 2. 2021-10-06. https://www.ktvu.com/news/very-strong-suspect-named-in-zodiac-killer-case-by-cold-case-group. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20251215024855/https://www.ktvu.com/news/very-strong-suspect-named-in-zodiac-killer-case-by-cold-case-group. Tier: 3 (relaying the claim).
- "Case remains open: FBI refutes claim Zodiac Killer case solved." NBC News (quoting FBI San Francisco). 2021-10-07. https://www.nbcnews.com/news/us-news/case-remains-open-fbi-refutes-claim-zodiac-killer-case-solved-n1281002. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20260530022215/https://www.nbcnews.com/news/us-news/case-remains-open-fbi-refutes-claim-zodiac-killer-case-solved-n1281002. Tier: 3 (FBI statement via Tier 3 outlet).
- "Did this group really crack the Zodiac case? Police, experts skeptical." The Union Democrat. 2021-10. https://www.uniondemocrat.com/news/article_c163a46e-2884-11ec-be65-5bd0c574a9b6.html. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20260530022145/https://www.uniondemocrat.com/news/article_c163a46e-2884-11ec-be65-5bd0c574a9b6.html. Tier: 3.
- "Yesterday's Crimes: The Zodiac Killer DNA Profile That Never Was." SF Weekly. 2018-03-21. https://www.sfweekly.com/archives/yesterday-s-crimes-the-zodiac-killer-dna-profile-that-never-was/article_119899a4-3748-5209-9c6f-4bebde7c734b.html. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20260519012116/https://www.sfweekly.com/archives/yesterday-s-crimes-the-zodiac-killer-dna-profile-that-never-was/article_119899a4-3748-5209-9c6f-4bebde7c734b.html. Tier: 3.
- "The Zodiac Killer's 340-character cipher solved." The Register. 2020-12-12. https://www.theregister.com/2020/12/12/zodiac_killers_cipher_solved/. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20260122135129/https://www.theregister.com/2020/12/12/zodiac_killers_cipher_solved/. Tier: 3.
- "Zodiac Killer suspects." Wikipedia. Accessed: 2026-05-30. https://en.wikipedia.org/wiki/Zodiac_Killer_suspects. Wayback: http://web.archive.org/web/20260522132632/https://en.wikipedia.org/wiki/Zodiac_Killer_suspects. Tier: aggregator (underlying facts Tier 1–3).
- Oranchak, David. "Cramming anagrams." zodiackillerciphers.com. https://www.zodiackillerciphers.com/?p=208. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20230327172649/http://www.zodiackillerciphers.com/?p=208. Tier: 1–2 for cipher methodology (primary technical author / FBI-verified 340 solver).
- "Zodiac Killer." Wikipedia. Accessed: 2026-05-30. https://en.wikipedia.org/wiki/Zodiac_Killer. Wayback: http://web.archive.org/web/20260528013732/https://en.wikipedia.org/wiki/Zodiac_Killer. Tier: aggregator (underlying facts Tier 1–3).
- "The Zodiac Killer's '340 Cipher' has been cracked." The Washington Post. 2020-12-11. https://www.washingtonpost.com/crime-law/2020/12/11/zodiac-killer-340-cypher-solved/. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20260129103338/https://www.washingtonpost.com/crime-law/2020/12/11/zodiac-killer-340-cypher-solved/. Tier: 3 (paywalled).
- Butterfield, Michael. "Arthur Leigh Allen: Primed Suspect." zodiackillerfacts.com. Accessed: 2026-05-30. https://zodiackillerfacts.com/zodiac-theories/the-accused-the-accusers/allen-primed-suspect/. Wayback: http://web.archive.org/web/20260128085000/https://zodiackillerfacts.com/zodiac-theories/the-accused-the-accusers/allen-primed-suspect/. Tier: 4 (independent researcher; reproduces primary police reports; thesis = Allen not Zodiac).
- Butterfield, Michael. "Earl Van Best Jr. / Gary Stewart." zodiackillerfacts.com. Accessed: 2026-05-30. https://zodiackillerfacts.com/zodiac-theories/the-accused-the-accusers/earl-van-best-jr-gary-stewart/. Wayback: http://web.archive.org/web/20260215004036/https://zodiackillerfacts.com/zodiac-theories/the-accused-the-accusers/earl-van-best-jr-gary-stewart/. Tier: 4.
- Hodel, Steve. "Questioned Document Expert Wakshull Confirms Alleged Zodiac Handwriting [was the] Priest['s]." stevehodel.com. 2014-10-23. https://stevehodel.com/2014/10/23/questioned-document-expert-wakshull-confirms-alleged-zodiac-handwriting-priest/. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20240418084414/https://stevehodel.com/2014/10/23/questioned-document-expert-wakshull-confirms-alleged-zodiac-handwriting-priest/. Tier: 4 (former-detective blog; relays Wakshull's admission).
- "Siblings who knew Arthur Leigh Allen say he was the Zodiac." TODAY. 2024. https://www.today.com/popculture/zodiac-killer-arthur-leigh-allen-rcna176996. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20260226205557/https://www.today.com/popculture/zodiac-killer-arthur-leigh-allen-rcna176996. Tier: 3 (reporting Tier 5 family claims).
- The Case Breakers. "Very Strong Suspect Named in Zodiac Killer Case." thecasebreakers.org. 2021-10. https://thecasebreakers.org/2021/10/very-strong-suspect-named-in-zodiac-killer-case-by-cold-case-group/. Accessed: 2026-05-30. Wayback: n/a (snapshot attempt was throttled; primary content is the group's own claim, also relayed in [3] and [4]). Tier: 4–5 (self-published, partisan).
- "Zodiac Killer (Gary Francis Poste): cipher, DNA, other suspects." KQED. 2021-10. https://www.kqed.org/arts/13904265/zodiac-killer-gary-francis-poste-cypher-dna-other-suspects. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20260530022314/https://www.kqed.org/arts/13904265/zodiac-killer-gary-francis-poste-cypher-dna-other-suspects. Tier: 3.
- "The Zodiac Killer's True Story." TIME. 2020. https://time.com/5798214/zodiac-killer-true-story-fx/. Accessed: 2026-05-30. Wayback: http://web.archive.org/web/20250626034934/https://time.com/5798214/zodiac-killer-true-story-fx/. Tier: 3.