Forensic Toxicological Verification and Technical Evidence Patterns in Allegations of Chemical Weapon Use: A Retrospective Documentary Analysis of OPCW Fact-Finding Mission Reports

Gören İ. E.

Turkish Journal of Technical Sciences and Innovation, cilt.2, sa.1, ss.31-44, 2026 (Hakemli Dergi)

Özet

Forensic toxicological verification of alleged chemical weapon incidents is challenging in conflict settings because delayed access, sample degradation, security constraints, incomplete documentation, and chain-of-custody gaps may limit interpretation. This retrospective documentary analysis examined technical evidence patterns in publicly available OPCW Fact-Finding Mission reports on alleged chemical weapon incidents in Syria. Forty-four OPCW-related documents were screened; 18 final or incident-specific reports were included; and 25 incident-level records were extracted. Six domains were coded: biomedical, environmental, clinical/medical, witness/interview, munition/cylinder/remnant, and laboratory evidence. Fourteen records were classified as positive/likely-positive and 11 as not established. Not-established outcomes were interpreted through a three-part forensic-toxicological limitation typology: sample-deficient limitation (Type A), non-specific toxidrome limitation (Type B), and source-linkage limitation (Type C). Positive outcomes were generally supported by chemically specific, source-linked, and procedurally reliable evidence, whereas not-established outcomes commonly reflected unavailable samples, lack of targeted analysis, non-specific toxidromes, limited site access, inconsistent documentation, or weak source linkage. The findings indicate that verification depends on integrated technical evidence patterns rather than clinical symptoms alone