Legal and Constitutional Issues
Core concepts
A candidate must know the Fourth Amendment search-and-seizure framework (reasonable suspicion, probable cause, warrant requirements, plain view, exigency, consent, search incident to arrest), Fifth Amendment self-incrimination and custody-plus-interrogation, Sixth Amendment right to counsel at critical stages, and Fourteenth Amendment due process. Know the exclusionary rule and its exceptions (attenuation, inevitable discovery, independent source, good faith), state-specific stop-and-identify statutes, and the difference between a consensual encounter, an investigative detention, and an arrest. Also know civil liability concepts: Section 1983, qualified immunity, and the difference between criminal and civil standards.
Traps
Questions often blur the standard of proof: reasonable suspicion (articulable facts) versus probable cause (fair probability). Another trap is mixing custody with interrogation-Miranda is triggered only by both. Watch for questions that treat a traffic stop as automatically an arrest, or that assume consent is valid after a person withdraws it. Qualified immunity questions often hinge on clearly established law at the time of the act.
Rule of thumb
Use the "totality of circumstances" lens: no single fact controls. If a question asks whether an officer could act, ask (1) what standard applies, (2) what facts support it, (3) whether an exception to the warrant requirement fits.
Worked example
An officer sees a bulge resembling a weapon during a lawful traffic stop and pats it down. That is a Terry frisk supported by reasonable suspicion that the person is armed, not a full search. If the pat-down reveals contraband by plain feel, seizure may be lawful; if it requires manipulation to identify, it likely is not.