Skip to Main Content

Law Subject Guide: US Legal Research

Starting Legal Research

To get legal research off to a quick start, always start with secondary sources.  Law review articles, books or treatises, legal encyclopedias and law dictionaries give you analysis, context and explanation of your legal research topic.  Secondary sources provide footnotes full of citations to key primary laws (cases, statutes and regulations) and additional secondary sources on a topic. 

 

A search of law reviews is the key first step.

Black's Law Dictionary 

Citing Legal Resources Using Standard Legal Citation

Legal Research and Writing

Citing Legal Resources Using MLA or APA Style

Federal Case Law

Decisions of courts, or case law, establish precedent.  Case law is one source of legal authority, along with statutes and regulations.  Before you rely on a case, be sure to update case law to be sure another case has not overruled it.

Levels of Federal Courts image

To find relevant case law on a topic, start with a secondary source, and mine the footnotes for citations to other sources, including cases, on your topic,  Once you have looked at secondary sources, you can also search case law.

Federal Cases

If a more recent case questions or even overrules the case you located, citators (Keycite in WestlawNext or Shepard's in Nexis Uni)  will let you know.  Citators also serve as a research tool - identifying additional cases on your topic.

Federal Statutes

 Federal statutes are laws passed by the US Congress.

Identify citations to federal statutes through secondary sources.  Full text searching of statutes online can be difficult because of the specialized legal jargon used.

Federal Regulations

Federal regulations, administrative rules, are codified or organized by topic in the Code of Federal Regulations (CFR).  The Federal Register, updating the CFR, is published daily. 

 Identify regulations through secondary sources or annotated statutes.

Code of Federal Regulations (CFR)

Federal Register

State Law

For State Court cases, use the links below:

For information about State Court structure, see the links below:

Finding Court Statistics