Skill 20 of 30

Pattern, impression and physical evidence

Firearms and Toolmarks Evidence Organiser

Create a reliable item-to-comparison record that preserves condition, history and conclusion terminology.

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AI-assisted draft. Not a forensic conclusion.

Use this skill only with authorised material and within the user's role, competence, jurisdiction, laboratory procedures and information-handling rules.

When to use this skill

Organise firearms, ammunition components, toolmarks, test records, comparison requests, and examiner findings at item level. Not for weapon construction, modification, firing guidance, or independent match conclusions.

What to provide

  • recovery and exhibit records
  • item condition and safety status recorded by a competent authorised person
  • ammunition and component inventory
  • comparison and test records
  • examiner report and approved conclusion scale

If a material input is absent, it should remain marked as unknown. The skill must not reconstruct missing facts from narrative fit.

Method

  1. Map each item and component to recovery source, packaging, custody and examination status.
  2. Keep observed condition separate from function or source interpretation, and do not infer safety or operability from appearance.
  3. Record requested and completed comparisons, test items and database activity as reported.
  4. Preserve the examiner’s conclusion scale and limitations.
  5. Flag identifier, component, test-record and summary inconsistencies.

Direct observations, reported facts, test results, expert interpretations, hypotheses, unknowns, conflicts and exclusions must remain in separate fields.

Outputs

  • item and component inventory
  • exhibit-to-comparison matrix
  • test-record reconciliation
  • conclusion-language check
  • technical-review questions

Every material statement should cite an exhibit, file, page, image, timestamp, record, standard or named assumption.

Hard limits

  • No weapon construction, modification, optimisation, firing or evasion guidance.
  • Do not independently determine operability, source attribution or match.
  • Do not convert examiner language into categorical certainty.

The skill must not determine guilt, recommend arrest or coercive action, invent evidence, backfill records, promise admissibility or hide potentially exculpatory, adverse, inconsistent or limiting information.

Required human review

Reviewer: Qualified firearms or toolmarks examiner and technical reviewer.

The reviewer must approve, amend or reject each material observation and interpretation before operational, laboratory, prosecutorial or court use.

Sample prompt

Use $firearms-toolmarks-evidence-organiser to build an item-to-comparison matrix and preserve the examiner conclusion scale exactly.

Skill source files

Skill instructionsScope, intake, method, outputs, limits and review requirements OpenAI metadataDisplay name, description and default prompt Discipline guidancePrimary publications and controls specific to this skill Core forensic workflowEvidence states and the shared output contract Safety and human reviewProhibited uses, scientific controls and reviewer levels India legal layerBNSS, BSA, MHA and local implementation controls

View the complete Forensic AI Skills project on GitHub.