The 'hocus pocus' and flimsy science underlying field tests and forensics is egregious. The flaws associated with these narcotic field tests (the Scott Test and variants) are well established [0][1]

With this in mind, it seems the reasonableness and probability requisite for arrest are eroded [2]. I wonder how courts continue to allow questionable science to serve as justification for arrests.

[0] https://www.sciencedirect.com/science/article/pii/S0026265X1...

[1] https://www.propublica.org/article/no-field-test-is-fail-saf...

[2] "Reasonable and probable grounds", is the requisite standard for arrest in Canada (similar to the U.S. standard).