Field tests for Marijuana also seem to regularly be baseless. A couple had their house raided partially because some loose leaf tea in their rubbish bin field-

Field tests for Marijuana also seem to regularly be baseless. A couple had their house raided partially because some loose leaf tea in their rubbish bin field-tested positive as marijuana: https://www.washingtonpost.com/news/the-watch/wp/2017/12/19/jury-rules-against-family-subjected-to-swat-raid-over-loose-leaf-tea/ https://www.washingtonpost.com/news/the-watch/wp/2017/12/19/... Police using unproven "drug recognition expert" training to "detect" marijuana use via body language: https://www.11alive.com/article/news/investigations/the-drug-whisperer-drivers-arrested-while-stone-cold-sober/85-437061710 https://www.11alive.com/article/news/investigations/the-drug... More on faulty drug testing: https://www.cacj.org/documents/sf_crime_lab/studies__misc_materials/falsepositives.pdf https://www.cacj.org/documents/sf_crime_lab/studies__misc_ma...