Criminal Law

This is one of a series of lessons on homicide, and one of two lessons on the topic of causation as applied in homicide cases. Although some crimes require only a mens rea and an actus reus (and, perhaps, an attendance circumstance), other crimes are "result" crimes in that they also require proof that defendant "caused" a particular result. Homicide is the quintessential result crime. This lesson builds on an earlier lesson dealing with causation in homicide cases by focusing on the Model Penal Code's approach to causation. This lesson is intended for students who have studied the MPC's causation provisions in class, and who wish to refine their understanding of the topic.

This is one of a series of lessons on homicide, and one of two lessons on the issue of causation in homicide cases. While some crimes require only a prohibited act, with the necessary mental state, other crimes are referred to as "result" crimes. In other words, in order to be convicted, the defendant must "cause" a prohibited result (with the required mens rea and with proof of required attendant circumstances). Homicide is the quintessential result crime in that defendant must have "caused" the death of another in order to be convicted. In this lesson, we explore the concept of causation (both actual and legal) in an effort to determine when, and under what circumstances, a defendant should be criminally accountable for the death of another. This lesson is intended for students who have studied these issues in class, and who wish to refine their knowledge and understanding of the topic.

This is one of a series of lessons on homicide, and it deals with the topic of felony murder. At common law, one way to commit murder was to show that defendant caused the death of another during commission of a felony (the so-called "felony murder doctrine"). This lesson examines that doctrine. It is intended for students who have studied the doctrine in class and who seek to refine their knowledge and understanding of the doctrine.

This is one of a series of lessons on homicide. Earlier lessons provide an overview of the crime of homicide, and individual lessons focus on such topics as murder, manslaughter and other crimes. This lesson focuses on the so-called unlawful act manslaughter doctrine. The lesson is intended for students who have studied this doctrine in class and who wish to refine their knowledge of the topic.

This is one of a series of lessons on homicide, and it examines the definitions of "death" and "life" for purposes of the law of homicide. Homicide is a "result" crime in that defendant must have caused the death of another person, and questions necessarily arise regarding when life begins and when life ends. In this lesson, we explore questions related to the definition of death and life in the law of homicide. This lesson is intended for students who have studied these issues in class, and who wish to refine and enhance their knowledge of the topic.

At common law, as well as under modern statutory codes, the crime of murder was defined as a homicide committed with "malice aforethought." Some modern statutes divide the crime of murder into degrees. In this lesson, we examine these statutes in an effort to see when and how they apply. The lesson is intended for students who have studied the murder by degree statutes in class, and who wish to refine and enhance their knowledge and understanding of the topic.

At common law, a distinction was made between the perpetrator of a crime, and the perpetrator's accomplices. In this lesson, we examine the common law definitions that applied to accomplices, and modern approaches to complicity, including the Model Penal Code. This lesson is intended for students who have studied these issues in class, and who wish to refine their knowledge and understanding.

In the criminal law, culpability can be premised upon either an "act" or (in appropriate cases) an "omission" to act. In this lesson, we examine the concept of culpability for omissions, and we explore the limits of criminal culpability. This lesson is intended for students who have studied these issues in class, and who wish to further refine their knowledge.

This lesson continues our discussion of accomplice liability. In a prior lesson, we examined how the common law and the Model Penal Code classified various types of accomplices. In another prior lesson, we examined the actus reus requirement for accomplice liability. In this lesson, we continue the discussion by focusing on the mens rea requirement for accomplice liability. The lesson is intended for students who have studied these issues in class, and who wish to refine their understanding and knowledge of the topic.

This is one of a series of lessons on homicide. In earlier lessons, we focused on the crime of murder, examining the common law, modern statutes and the Model Penal Code formulation. In this lesson, we continue our examination of homicide by focusing on the crime of involuntary manslaughter. This lesson is intended for students who have studied these issues in class, and who wish to refine and enhance their knowledge and understanding of the topic.

At common law, as well as under modern statutory codes, the crime of homicide was (and is) divided into various component crimes. In addition to the crime of murder, the most serious crime, there are other crimes (e.g., voluntary manslaughter, involuntary manslaughter, etc.). This lesson provides an overview of the crime of murder by examining how that crime was handled under the common law, as well as how it is handled under the Model Penal Code, and other modern statutory approaches. Subsequent lessons will provide more detailed examination of these topics. This lesson is intended for students who have studied the crime of murder in class, and who wish to refine and enhance their knowledge and understanding of the topic.

This lesson provides a basic overview of the law of homicide. It is an introductory lesson to get you started on distinguishing criminal from noncriminal homicide, identifying the elements of homicide, and analyzing the varying degrees of homicide. The lesson guides you through applying the basic concepts of actus reus, mens rea and causation to homicide offenses and provides an analytical framework for approaching homicide problems. Finally, it provides separate practice questions and an opportunity to try out the problem-solving approach on an exam-type question.

This lesson explores the various ways in which the criminal law considers victim consent. Topics include consent as negating an offense element, consent as justification, effective consent, and limitations on consent as a defense.

This is an advanced lesson that demonstrates how the Model Penal Code rules of construction treat mistakes with regard to elements of defenses.

This is one in a series of lessons on accomplice liability. In earlier lessons, we examined how accomplices were classified under the common law and the Model Penal Code. In addition, we examined the mens rea requirement for accomplice liability. In this lesson, we continue the discussion by examining the actus reus requirement of accomplice liability. This lesson is intended for students who have studied these issues in class, and who wish to further refine their knowledge and understanding of the topic.

This lesson is one of several addressing the offense of criminal attempt as set forth in the Model Penal Code. In this lesson, students consider broad concepts relating to the law of attempts, such as what mental state, if any, should be required for punishing an incomplete offense (with reference to theories of punishment) and how certain crimes not so labeled are actually particular kinds of attempt offenses. It then examines the mens rea for an attempted offense, highlighting the distinction between knowledge and purpose, and further distinguishing purpose as to conduct from purpose as to result.

This is a basic lesson covering the common law doctrine of concurrence. At common law, crimes required not only an actus reus and a mens rea but concurrence of the two. Through use of scenarios involving the common law crimes of murder, robbery, burglary and larceny (which are briefly introduced), the requirements for concurrence are explored. In addition, also through the use of scenarios, the doctrine is distinguished from the related doctrines of causation and mistake. Finally, concurrence as to attendant circumstances is also addressed. After completing this lesson, the student should have a working knowledge of the common law doctrine of concurrence and some understanding of how modern common law jurisdictions deal with the issues raised by this doctrine.

This lesson explains how the MPC deals with the maxim "ignorance of the law is no excuse." It addresses the general rule that a defendant need not know his or her conduct is criminal and looks at the exceptions to that general rule found in MPC § 2.04(3)(b).

This lesson looks at the treatment of mistakes of fact and law as they relate to elements of offenses under the Model Penal Code.

This is the second in a series of lessons on culpability requirements under the Model Penal Code (MPC). This lesson, which assumes students are familiar with the basic requirement that every material element have a state of mind, addresses the state of mind that applies to each element when one or more states of mind are contained in an MPC criminal statute. The lesson introduces students to the various types of elements in MPC statutes and to the general rule, found in § 2.02(4), that where a state of mind is specified, it applies to all material elements unless a contrary purpose plainly appears. The lesson affords students the opportunity to practice the default rules relating to states of mind on mock statutes and to learn how the legislature expresses a contrary purpose.

This is an elementary lesson that introduces the concept of default rules in the Model Penal Code. Students will be introduced to the hierarchy of states of mind expressed in § 2.02(5). This lesson uses sample statutes and scenarios to allow students to practice applying the default rules and hopefully to provide an understanding of why default rules are desirable.

This lesson covers the subject of defense of others. In many respects an actor's right to defend another parallels his or her right to defend himself or herself. However, there are some specific exceptions and nuances that must be understood. It is the purpose of this lesson to cover those specifics and nuances in the context of some classic scenarios.

This lesson covers the subject of the duty to retreat as a requirement for the justification defense of self-defense. The lesson reviews the common law and current status of the duty to retreat. This subject matter is not particularly complicated, but there are some details that require close scrutiny.

This is a lesson on battered woman syndrome with respect to the defense of self-defense. Over the last few decades, there has developed in the legal literature a recognition of this, and other similar syndromes, in the context of homicide cases. The situation of an abused person who kills the abuser raises questions about the basis for a defense of self-defense in circumstances that might not easily fit into the traditional self-defense mold. Though courts allow the defense in many cases, the invocation of the defense still presents problems in certain situations. The purpose of this lesson is to explore those varying circumstances and the issues raised with respect to the possibility of a defendant invoking the defense of self-defense.