Provenance record

‘A serious failure’: CPS prosecutor cites imaginary case to high court after AI search

The Guardian: Artificial Intelligence (tier 1, news) 2026-11-03T06:00:40.000Z Original ↗

Discourse valence

-53

Adverse

confidence 82% · 5 items · range -65 to -35

-100

-50

+50

+100

-53

Adverse readingFavourable reading

Consensus of 5 models from different labs. Spread 30 points, agreement moderate.

Existential and catastrophic risk Synthetic media and manipulation Concentration of power

Excerpt as ingested

Exclusive: Nonexistent precedent cited in alleged child rape case adds to dozens of AI-related errors plaguing court proceedings A senior crown prosecutor acting in a high court case cited an imaginary legal precedent in an error that has sparked fresh concerns about AI hallucinations infecting the justice system. Ravinder Dhillon, representing the Crown Prosecution Service (CPS), referenced an entirely made-up case during a dispute over whether a child should be prosecuted for the rape of his younger sister, court documents have revealed. Continue reading...

Every model that read this

Model	Provider	Stage	Score	Conf.	Latency	Prompt	When
Llama 3.3 70B	Meta	analysis	-50	80%	3023ms	v1.0.0 / m1.0.1	2026-11-03 06:17
GPT-4.1 mini	OpenAI	consensus	-35	80%	3513ms	v1.0.0 / m1.0.1	2026-11-03 06:17
Claude Sonnet 5	Anthropic	consensus	-55	70%	5963ms	v1.0.0 / m1.0.1	2026-11-03 06:17
Gemini 2.5 Flash	Google	consensus	-60	90%	1950ms	v1.0.0 / m1.0.1	2026-11-03 06:17
Mistral Small 3.1 24B	Mistral AI	consensus	-65	90%	4512ms	v1.0.0 / m1.0.1	2026-11-03 06:17

Llama 3.3 70B · reading

AI error infects justice system

evidence: reported horizon: n/a

GPT-4.1 mini · reading

The citation of a fabricated legal precedent by a senior prosecutor due to AI hallucination demonstrates a material failure in legal processes, risking miscarriages of justice. While the impact is serious, it does not yet indicate systemic collapse or existential threat, hence a significant but not extreme negative score.

evidence: reported horizon: now capability 40 societal 0 existential 0 economic 0

Claude Sonnet 5 · reading

A real, documented case of AI hallucination causing a factual error in a serious high court legal proceeding, part of a broader pattern. This reflects a material institutional failure in a high-stakes domain, though the scope of 'dozens of errors' is unverified detail.

evidence: reported horizon: n/a

Gemini 2.5 Flash · reading

The article reports a specific instance where a prosecutor cited a fabricated legal precedent generated by an AI search tool in a high-stakes legal case. This direct impact on the justice system, particularly concerning a serious crime, represents a material negative implication for human flourishing. The error risks undermining the integrity and fairness of legal proceedings.

evidence: primary horizon: n/a

Mistral Small 3.1 24B · reading

The text describes a serious error in a legal case due to AI hallucinations. This indicates a significant risk to the integrity of the justice system.

evidence: primary horizon: n/a

Evidence extracted

AI search led to citing imaginary case

The chain

SOURCE     The Guardian: Artificial Intelligence (tier 1)
   ↓
DOCUMENT   8866eca0-8a6c-405a-b63d-5aff92606335
           https://theguardian.com/technology/2026/nov/03/a-serious-failure-cps-prosecutor-cites-imaginary-case-to-high-court-after-ai-search
   ↓
EVIDENCE   1 extracted excerpt
   ↓
MODEL RUN  5 runs, methodology 1.0.1
   ↓
SCORE      -53  (Adverse)
   ↓
CONFIDENCE 82%