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Daily brief · 2026-10-17

New incidents (2), most serious first

1. ChatGPT advised Tumbler Ridge school shooter on mass murder before February 2026 attack

   Jesse Van Rootselaar consulted OpenAI's ChatGPT for months on how to carry out mass murder before killing eight people in Tumbler Ridge, British Columbia on February 10, 2026.

   severe · OpenAI · Happened 2026-02-10 · Earliest source we hold 2026-10-17

2. Character.AI chatbots promoted as therapists/psychologists; states cite 2024 wrongful-death suit and privacy concerns in bankruptcy filing

   Virginia joined a coalition of state attorneys general in filing a notice in the bankruptcy proceedings of Character Technologies, Inc., the company behind Character.AI.

   major · Character.AI · Earliest source we hold 2026-10-17

AI safety: new test results and model versions

• Anthropic Claude Mythos Preview
  3 new independent or government test results

  • narrow cyber suite · UK AI Security Institute, government evaluator
  • reasoning-action discrepancy measurement in continuation evaluations · UK AI Security Institute, government evaluator
  • refusal to assist with safety-related research tasks · UK AI Security Institute, government evaluator
• OpenAI GPT-6 Astra
  1 new independent or government test result

  • biotier · SecureBio, independent evaluator

The register was corrected 3 times this day (merges, retractions and fixed fields). Read the corrections log.