DRE Legal & Ethical Issues 2 — Questions and Answers
Question 1: Under the Fourth Amendment, a DRE evaluation conducted after a lawful DUI arrest is generally considered:
- A search requiring a separate warrant
- A valid search incident to arrest (Correct answer)
- Prohibited without written consent
- Only permissible with a supervisor's approval
Correct answer: A valid search incident to arrest
The search-incident-to-arrest doctrine allows officers to conduct evaluations following a lawful custodial arrest without an additional warrant.
Question 2: Which U.S. Supreme Court case established that a blood draw without a warrant could violate the Fourth Amendment in DUI cases?
- Schmerber v. California
- Missouri v. McNeely (Correct answer)
- Birchfield v. North Dakota
- Illinois v. Caballes
Correct answer: Missouri v. McNeely
Missouri v. McNeely (2013) held that the natural dissipation of alcohol alone does not create a per se exigency justifying a warrantless blood draw.
Question 3: A DRE who testifies beyond his area of documented training and certification risks:
- Promotion to lead investigator
- Exclusion of testimony and disciplinary action (Correct answer)
- Automatic case dismissal with prejudice
- A mandatory refresher course only
Correct answer: Exclusion of testimony and disciplinary action
Offering expert opinions outside one's certified expertise can result in excluded testimony, credibility damage, and departmental discipline.
Question 4: Implied consent laws require drivers to:
- Pass a field sobriety test on demand
- Submit to chemical testing as a condition of driving privileges (Correct answer)
- Allow a full DRE evaluation before any arrest
- Waive their right to an attorney during roadside stops
Correct answer: Submit to chemical testing as a condition of driving privileges
By accepting a driver's license, drivers implicitly consent to chemical testing; refusal typically triggers administrative license suspension.
Question 5: When a DRE forms an opinion that a subject is impaired but the toxicology screen returns negative, the DRE should:
- Immediately withdraw all opinions
- Discard the report as inconclusive
- Document the disparity and consider whether the drug may not be detected by the panel used (Correct answer)
- Charge the subject with obstruction for contaminating the sample
Correct answer: Document the disparity and consider whether the drug may not be detected by the panel used
Standard toxicology panels do not detect all drugs; DREs must document findings accurately and note limitations of the screening panel.
Question 6: Which ethical principle requires a DRE to disclose findings that support the defense as readily as findings that support the prosecution?
- Duty of loyalty
- Brady obligation
- Impartiality / objectivity (Correct answer)
- Chain-of-custody protocol
Correct answer: Impartiality / objectivity
DRE evaluators must report all observations objectively, regardless of which party they benefit, to maintain scientific and legal integrity.
Question 7: Birchfield v. North Dakota (2016) held that states may impose criminal penalties for refusing:
- A blood test following a DUI arrest
- A breath test following a DUI arrest (Correct answer)
- A urine test following a DUI arrest
- All forms of chemical testing equally
Correct answer: A breath test following a DUI arrest
The Court ruled that breath tests are searches incident to arrest not requiring a warrant, so criminal refusal penalties are constitutional, but the same does not apply to blood tests.
DRE Legal & Ethical Issues 2
Under the Fourth Amendment, a DRE evaluation conducted after a lawful DUI arrest is generally considered: