Key Takeaways: Field Autopsy — Criminal Justice
The Big Idea
The criminal justice system has convicted hundreds of people using forensic techniques without scientific basis. The Innocence Project's 375+ DNA exonerations reveal systemic, not occasional, failure — produced by structural features of the system (legal precedent, prosecutorial tunnel vision, finality bias) that make it uniquely resistant to correction.
Unvalidated Forensic Techniques
| Technique | Scientific Status | Known Cost |
|---|---|---|
| Bite mark analysis | No scientific basis (NAS 2009) | 26+ wrongful convictions |
| Hair microscopy | FBI admitted 95% flawed testimony | 32 death sentences in affected cases |
| Blood spatter | Subjective, unvalidated | Unknown |
| Polygraph | "Little basis for extremely high accuracy" (NAS 2003) | Used despite inadmissibility |
| Eyewitness testimony | Unreliable, especially cross-racial | ~69% of DNA exonerations |
Why Criminal Justice Is Uniquely Resistant to Correction
- Legal precedent as error-preservation mechanism (authority cascade encoded in law)
- Prosecutorial tunnel vision (structural confirmation bias)
- Visibility asymmetry (false acquittals visible; false convictions invisible)
- Finality bias (system designed to defend conclusions, not re-evaluate them)
- Race amplification (failure modes disproportionately affect Black defendants)
Innocence Project Data
~69% eyewitness misidentification, ~44% flawed forensics, ~29% false confessions, ~17% informant testimony. Average 14 years wrongful imprisonment. 58% of exonerees are Black.
Correction Speed Model: Extremely Slow
Every variable pulls toward slow. Legal precedent and prosecutorial power create barriers that scientific evidence alone cannot overcome.
Epistemic Audit — Chapter 27 Addition
Assess your field for: finality bias, error visibility asymmetry, precedent-like mechanisms, and structural barriers to correction.