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To investigate illegal firearms possession, collect raw case narratives, identify the weapon type to confirm it is prohibited from local licensing, and generate a structured preliminary case summary with outstanding investigative questions and recommended evidence submissions.

Required evidence collection steps for unlicensed firearms include photographing and cataloguing each item, preserving chains of custody, and submitting exhibits to the national police forensic lab, กองพิสูจน์หลักฐาน กรมตำรวจ, for testing.

You need to submit firearms exhibits to the forensic lab during a criminal investigation whenever the case involves unlicensed or prohibited weapons, requiring the national police forensic lab to test the items to support charging and prosecution.

This illegal firearms investigation guidance applies specifically to Thai criminal investigations involving unlicensed or prohibited weapons of a type that local registrars may not license, distinguishing this prohibited-weapon category from other firearms offenses.

To question suspects and witnesses for an illegal firearms possession case, ask focused investigative questions designed to establish possession, intent, and provenance of the prohibited weapon, generating a structured checklist for the investigator.

Legal elements that must be proven for illegal firearms possession include identifying statutory elements under the พ.ร.บ. อาวุธปืนฯ พ.ศ. 2490, establishing possession of a weapon prohibited from local licensing, and documenting the chain of custody.