Recovery of integrated and surface trace DNA from illicit drug tablets

Area of Science:

• Forensic Science
• Genetics
• Criminology

Background:

• Illicit drug tablets are common, but trace DNA detection methods are underexplored compared to capsules.
• Tablets' unique surfaces may affect DNA transfer, persistence, and recovery efficiency.
• DNA profiling can link drug seizures and provide intelligence on preparation and distribution networks.

Purpose of the Study:

• To investigate the feasibility of detecting and profiling trace DNA from illicit drug tablets.
• To differentiate DNA profiles originating from drug synthesis versus distribution handlers.
• To assess the utility of tablet DNA analysis for law enforcement intelligence.

Main Methods:

• Simulated illicit drug tablets were spiked with DNA during a synthesis stage.
• A second individual handled tablets during a simulated distribution stage.
• Both exterior swabs and whole tablet extracts underwent separate DNA extraction and profiling.

Main Results:

• Exterior swabs yielded single-source DNA profiles of the handler in 100% of samples.
• Tablet extracts identified the synthesis DNA donor in 80% of samples, with some handler DNA detected in 60%.
• Distinct DNA profiles were obtained for synthesis and distribution phases.

Conclusions:

• Trace DNA analysis of illicit drug tablets is feasible and effective for identifying individuals involved in both synthesis and distribution.
• This method provides valuable forensic intelligence for drug investigations.
• DNA profiling of drug tablets complements chemical analysis and aids in linking seizures.