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The idea

The killer’s errors get him caught. The system’s errors let him keep going.

Pattern of Errors explains how killers get caught, and why some never are. The subject is the system. The killers are the evidence.

The ten casesThe pyramid

The patternEvents on the record, in order.

The errorThe one event out of line. Sodium marks it, every time.

  • His errorthe catch

    A slip that names him: a ticket, a sample, a sheath.

  • Their errorthe missed chance

    A moment the system had him and let him go.

The cases

10 cases · one mechanism each

  1. No. 01The Myth

    An IQ of 145 turned himself in.

    Santa Cruz, California · 1972–1973
  2. No. 02The Catch

    The parking ticket only picked the date.

    New York · 1976–1977
  3. No. 03The Myth

    An IQ of 85 stayed free for nineteen years.

    Seattle area · 1982–2003
  4. No. 04The Myth

    The FBI retired the myth that serial killers can’t stop in 2008.

    California · 1975–2020
  5. No. 05The Catch

    A criminology PhD student left his DNA at the scene.

    Moscow, Idaho · 2022–2025
  6. No. 06The Pyramid

    Every step up this pyramid removes one way to get caught.

    Five cases
  7. No. 07The Failure

    Gacy and Zodiac are opposites, and that explains both.

    Chicago suburbs · 1972–1978
  8. No. 08The Class

    Concealment decides how long. Biology decides whether.

    United States · 1970–2014
  9. No. 09The Failure

    A doctor’s signature made every death natural.

    England · 1971–2000
  10. No. 10The Failure

    The state executed a man it later cleared, then released a killer.

    Shakhty, Soviet Union · 1978–1994
All cases

The framework

No. 06 · The Pyramid

Every step up this pyramid removes one way to get caught.

Five tiers, sorted by how many ways there are to catch a killer. The base is crowded and the top is nearly empty. Each step up, one catching mechanism disappears.

The pyramid, explained
  1. Tier 1 · stranger, no identifying trace, stopsZodiac, open case: nothing left to catchSource: SFPD / Vallejo PD: Zodiac case open
  2. Tier 2 · the plannerKeyes, confessed, died before trial: caught by one mistakeSource: FBI statements on Israel Keyes (2012–13) — confessed in custody; died Dec 2, 2012, before trial
  3. Tier 3 · unreported victimsRidgway: caught by DNA, lateSource: State v. Ridgway, King County (2003)
  4. Tier 4 · organized, stable lifeRader: caught by biology / egoSource: Kansas v. Rader (2005)
  5. Tier 5 · falls apartDahmer: caught by behaviorSource: Wisconsin v. Dahmer (1992)

Five series

Each one a way into the record

  1. The Pyramid

    Five tiers, sorted by how many ways there are to catch a killer. Each step up removes one.

    1 case · 2 readings

  2. The Catch

    The single mechanism that ends a case: a ticket, a sample, a sheath, a forged will.

    2 cases · 4 readings

  3. The Failure

    The moments the system had him, or had the information, and let it go.

    3 cases · 4 readings

  4. The Myth

    The genius, the loner, the man who cannot stop. The record says otherwise.

    3 cases · 4 readings

  5. The Class

    Definitions and typologies describe a case. A few conditions decide it.

    1 case · 3 readings

Standards

The rules every page is written to

  • Victims first.

    Name the people who died, with care, before the man who killed them.

  • What the court found.

    Adjudicated cases only. A confession that was never tried is labeled every time.

  • Investigator language.

    Plain verbs. No adjective the record can’t carry. Never a killer’s words as a hook.

  • Names said flat.

    Legal names in titles. A name a killer gave himself never becomes a title.

  • Sources in view.

    Every claim carries its source: in the frame, in the description, and in full on its page here.

  • The family test.

    Could the victim’s family watch it and feel the point was the system, not the man?

The standards in full

Standing line

Educational analysis. Adjudicated cases only. Victims named with respect.

In brief

What is Pattern of Errors?

Pattern of Errors is a documentary series and a sourced record of how killers get caught, and why some never are. Each entry takes one adjudicated case, names the mechanism that ended it or let it run, and lists every source in full. The subject is the system. The killers are the evidence.

Which cases does Pattern of Errors cover?

Adjudicated cases only: a conviction, a guilty plea or an official finding. A confession that was never tried is labeled every time. An open case is described as open, and no suspect is named.

Where do the facts come from?

From court records, plea statements, official inquiries and agency reports first, then a second published source. Every case page lists its sources in full.

Does Pattern of Errors show photographs of victims or crime scenes?

No. There are no faces and no crime scenes. Diagrams carry the argument. A photograph of a place, a document or an object appears only as a numbered exhibit, with its date and its source.

What do the diagrams mean?

Every diagram uses one notation. A paper dot is an event on the record. A sodium ring is a missed chance, a moment the system had him and let him go. A sodium dot knocked out of line is the catch, the error that ended it.

How are errors on this site corrected?

Corrections are dated and public. A corrected page carries a note that links to the corrections log.