If the field test shows positive, what should you do with the remaining substance?

• A. Return the substance to the owner.
• B. Destroy the remaining substance and discard.
• C. Maintain the remaining substance as evidence.
• D. Sell the substance to fund operations.

Answer: (C)

When a field test yields a positive result, the remaining substance should be secured as evidence to preserve the chain of custody and allow official laboratory confirmation. Field tests are presumptive and can have false positives, so keeping the material under proper control ensures it cannot be tampered with and can be accurately identified and quantified later. This handling protects the integrity of the investigation and supports any potential legal process. Destroying, returning the substance, or selling it would compromise evidence, may be illegal, and undermine due process.