Chapter 3: Accessing the Law and Legal Literature

Unlike standard clinical evaluations, forensic assessments are structured around specific legal questions posed by particular jurisdictions, requiring evaluators to understand both the substantive law and the procedural context in which their work operates. A critical distinction emphasized throughout is that clinical diagnoses alone rarely answer legal questions; instead, professionals must evaluate an individual's functional legal capacities and establish the causal relationship between psychological conditions and legally relevant abilities. To ensure their testimony withstands judicial scrutiny, evaluators must be familiar with evidentiary standards such as Daubert and Frye criteria, which govern the admissibility of expert evidence and demand that assessment tools be scientifically reliable and well-validated. The chapter systematically explains the structure of the U.S. legal system, including the parallel federal and state court hierarchies and the distinction between binding authority, which judges must follow from higher courts within their jurisdiction, and persuasive authority from lower or foreign courts. Understanding primary sources of law—statutory law enacted by legislatures, case law established through judicial precedent, and constitutional protections—is essential, as is familiarity with secondary sources such as legal encyclopedias, treatises, and restatements that provide accessible overviews. The chapter provides comprehensive guidance on conducting legal research through both formal electronic databases like Westlaw and LexisNexis and free resources such as Google Scholar and Cornell's Legal Information Institute, while emphasizing informal research methods including consultation with attorneys and professional organizations. Practical instruction covers the careful interpretation of statutes, which requires literal reading and attention to specific language like mandatory versus discretionary phrasing, and the analysis of case law, where distinguishing between holdings and legal reasoning is crucial for determining applicability. Finally, the chapter stresses the importance of ensuring legal authorities remain valid by confirming that statutes have not been repealed and cases have not been reversed, using tools like KeyCite and Shepardizing to verify that cited law remains good law.