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Law and Legal Research

This guide highlights resources for finding answers to basic legal questions.

Criminal Law

What is Criminal Law?

In the U.S. we have two broad bodies of law that encompass all legal issues: CriminalArchitectural rendering of proposed Law and Criminal Justice building and Civil law. Civil Law is a blanket term for all non-criminal law (like financial, custody, and other disputes between private citizens or entities). Criminal Law covers a system of laws enacted to punish or reform those who have committed a criminal act such as a misdemeanor or a felony. Criminal Law enforcement and punishment varies by jurisdiction (the territory or location of legal authority).

Here is the definition for Criminal Law from Cornell's legal dictionary Wex:

Criminal law, as distinguished from civil law, is a system of laws concerned with crimes and the punishment of individuals who commit crimes. Thus, where in a civil case two parties dispute their rights, a criminal prosecution involves the government deciding whether to punish an individual for either an act or an omission.

A “crime” is any act or omission in violation of a law prohibiting said action or omission.

Above, right: Architectural rendering of proposed Law and Criminal Justice building at Northeastern University. 1966.


The location of a crime and the severity of the crime will determine who (which jurisdiction) is responsible for the trial and punishment. For example, the Boston Municipal Court has specific jurisdictions it presides over. A crime committed in New Hampshire will be handled by New Hampshire courts, not Massachusetts. However, the severity of a crime may elevate a case to the next level in the court hierarchy (Tribal Nations have their own jurisdictions but serious crimes will also be elevated to Federal Courts). In most basic terms the hierarchy for the courts is Trial Court > Appellate (Appeals) Court > Supreme Court. See the chart on the right for a detailed Massachusetts court hierarchy. Both Civil and Criminal cases are subject to court hierarchy.


Criminal Law in Massachusetts

Make use of Mass.gov to learn more about criminal law in the Commonwealth. Their Criminal Law page breaks the topic down into three categories: 

The Massachusetts Trial Court Law Library website has done the research legwork on criminal law and has a page entitled "Massachusetts law about criminal law and procedure" which contains laws, cases, and web sources on criminal law and procedure law.

The Trial Court Law Library also has a Massachusetts Guide to Evidence. It is prepared annually by the Supreme Judicial Court of Massachusetts. The guide arranges the current law in one easily usable document, along the lines of the Federal Rules of Evidence. The Guide presents evidence law as it currently exists, along with explanatory notes. 

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