Common drug tests lead to tens of thousands wrongful arrests a year

Field Drug Test Accuracy and Misuse

• Colorimetric field tests are described as cheap, fast, and widely used despite high error rates.
• Cited figures: ~4% false positives in lab conditions, 15–18% in the field, and one NYC jail-mail program where 91% of positives were later found false.
• Tests are labeled by manufacturers as screening-only with mandatory lab confirmation, yet are reportedly used as de facto proof for arrest and charging.
• Some note these tests are also unreliable for safety/harm-reduction: ambiguous colors, test aging, and non-uniform samples.

Plea Deals, Bail, and Coerced Outcomes

• Many arrested on the basis of field tests reportedly take plea deals because they cannot afford months in jail while waiting for lab results.
• “Trial tax” is criticized: sentences after trial can be dramatically higher than plea offers, pushing even innocent people to plead.
• Public defenders are portrayed as overworked, underpaid, and incentivized to negotiate quick pleas, especially when a test appears “failed.”
• Bail is framed as a “pay-to-win” system that bakes inequality into outcomes and enables coercive pleas.

Rights, Speedy Trials, and Waivability

• Debate over what would happen if speedy-trial rights couldn’t be waived and plea deals were banned: some predict mass dismissals and more rational charging; others fear system overload and vigilante justice.
• Example from NYC where requiring prosecutors to have all evidence ready by the speedy-trial date reportedly drove many low-level dismissals.
• Broader philosophical argument on whether any rights (e.g., speedy trial vs. anti-slavery) should be waivable and what “waiver” really means.

Drug Policy and Testing Philosophy

• Some argue that if tests can’t show current impairment (e.g., THC metabolite tests) they shouldn’t be used for DWI or similar offenses.
• Strong support for legalizing and regulating drugs (and sometimes prostitution), treating them like alcohol/tobacco, emphasizing harm reduction, quality control, and taxation.
• View that responsible, educated drug use is common but invisible; current “war on drugs” is seen as a failure that will be judged harshly by history.

System Incentives and “Purpose of the System”

• Several comments stress that systemic outcomes (wrongful arrests, criminalization of poverty) reveal the system’s true “purpose,” regardless of stated intent.
• Others counter that this maxim overstates intent and can become a shallow rhetorical attack; they distinguish between designers’ intentions and emergent purposes.
• Discussion of prosecutors, private prisons, and police funding being tied to arrests/convictions, creating perverse incentives.
• Dispute over politically backed district attorneys: some see them as corrupt subverters of law; others as democratically elected actors correctly using discretion against unjust laws.

Policing Priorities and Selective Enforcement

• Repeated anecdotes of police ignoring property crimes (bike thefts, burglaries, stolen phones) unless large retailers provide gift-wrapped evidence.
• Perception that police prioritize protecting property of “nobles” (wealthy individuals, corporations) over everyday victims, in the US and in some European countries.
• Discussion of legal authority for shopkeepers to detain suspected thieves and the practical risks they face if wrong.

Proposed Reforms and Alternatives

• Suggestions to:
  • Forbid arrests based solely on field-test results and require lab confirmation before charging.
  • If tests are kept, penalize officers proportionally when a field-test-based arrest proves false, to align incentives.
  • Reduce or abolish bail, given its role in coercing pleas.
  • Eliminate or tightly regulate plea bargains; require equal sentencing whether via plea or trial.
  • Limit prosecutions when proper scientific testing is too costly/slow—if you can’t test accurately, don’t criminalize.
  • Hold state labs accountable for refusing or delaying confirmatory testing.
  • Sue or regulate test manufacturers more aggressively if they oversell accuracy.