Law Enforcement
Law Enforcement on the NC State Trooper exam tests your command of constitutional stops, searches, arrests, traffic enforcement, DWI procedure, and use-of-force rules for a statewide sworn officer. The exam favors application: given a short factual scene, identify the legal threshold and the next lawful action.
Stops, searches, and arrests
A traffic stop is a seizure, so it needs reasonable suspicion of a traffic violation or other crime; probable cause is required for arrest. During a lawful stop, the trooper may order the driver and passengers out, check license and registration, and address safety concerns. A search generally requires consent, a warrant, or a recognized exception: plain view, exigent circumstances, search incident to arrest, automobile exception, or inventory. Consent must be voluntary, and the scope can be withdrawn.
DWI and implied consent
North Carolina's DWI offense, G.S. 20-138.1, requires impairment plus operation of a vehicle; 0.08 BAC is a per se threshold. Observations-weaving, odor, glassy eyes, slurred speech, admissions, field sobriety performance-build probable cause. After arrest, the implied-consent procedure under G.S. 20-16.2 controls the chemical test; refusal triggers an administrative revocation, so document the sequence and any refusal.
Force
Use of force is judged by objective reasonableness under Graham v. Connor, considering the severity of the offense, immediate threat, and active resistance or flight.
Worked example: A trooper sees a pickup weave across the centerline at 2 a.m. and stops it. The driver smells of alcohol, has glassy eyes, and admits drinking. Field sobriety tests go poorly. The trooper arrests for DWI and reads implied consent; the driver refuses. Reasoning: weaving supplied reasonable suspicion; the observations and test performance supplied probable cause. The stop was not custodial interrogation, so Miranda was not triggered by roadside questions. The refusal is handled through implied-consent procedure.
Traps: treating reasonable suspicion and probable cause as interchangeable; assuming every traffic stop requires Miranda; searching without consent, warrant, or exception; judging force with hindsight; skipping implied-consent documentation.