"Presumptive field testing for drugs of abuse sometimes creates more problems than it solves. The tests require some subjective interpretation, and the results are difficult to preserve for evidence. A new test kit line, coupled with a smartphone app, improves the situation.
DetectaChem offers state-of-the-art chemical colorimetric trace testing with its MobileDetect Pouch, but confirms the result with photographic evidence, clear drug detection results, GPS mapping and more collected and preserved with its Mobile Detect application. The officer in the field is spared the task of making a subjective determination whether the color of the test solution matches the one that indicates the suspect drug, or something else."
Link to Full Article: https://www.policeone.com/