About This Chapter
Justification & Excuse Defenses - Chapter Summary
This self-paced and mobile-friendly criminal law chapter outlines topics about justification and excuse defenses. Follow along with our expert instructors to review the fundamentals of a duress defense, insanity defense, necessity defense and much more. In addition to short lessons, this chapter comes with interactive self-assessments that can help you retain the information you study. Use any computer or mobile device to access these resources, and feel free to reach out to our instructors if you have any questions. The chapter is also available at any time of day or night. When you're finished with the chapter, you'll be able to:
- Recognize types of defenses that are used against criminal charges
- Interpret self-defense, necessity defense and duress defense laws
- Explain intoxication-related laws
- Discuss significant cases that used an insanity defense, criminal insanity and mistake of fact
- Summarize the history of the M'Naghten rule
- Understand the legal aspects of psychological evaluations
- Define battered woman syndrome
1. Types of Defense Against a Criminal Charge
In this lesson, we will learn about possible defenses against a criminal charge. We will look at what these defenses are, how they are presented and what they mean in a criminal case. We will then look at some specific examples of each defense.
2. Self-Defense: Definition & Laws
Self-defense, with respect to criminal law, involves the justified use of force to protect oneself from harm. Find out in this lesson when, how, and where one can defend oneself under the law.
3. Necessity Defense: Definition, Laws & Examples
In an emergency situation, the law allows a person to engage in conduct that would otherwise be prohibited. In this lesson, we will learn the meaning of the defense of necessity and under what circumstances it applies.
4. Duress Defense: Definition, Laws & Examples
In criminal law, duress can be used as a defense to charges that are brought forth. This lesson will define the duress defense, review laws that apply to it, and provide a few case examples where the duress defense was presented.
5. Intoxication & Law: Definition & Overview
Intoxication is a legal defense that may be used to prove that a criminal defendant lacked the required guilty mental state to be convicted of a crime. This lesson provides a general definition of intoxication and an introduction to how the defense is used.
6. Criminal Insanity: Cases, Law & Defense
Criminal insanity is a legal defense that may be used to avoid criminal responsibility. This lesson will introduce you to the concept of criminal insanity and provide examples of notable cases involving the defense, as well as the tests used to determine if a defendant is criminally insane.
7. The Insanity Defense: Definition, Famous Cases, Pros & Cons
This lesson will review the insanity defense. You will first examine the definition of the insanity defense. Then you will look at several famous insanity defense cases. Finally, you will review the pros and cons of the insanity defense.
8. M'Naghten Rule: Definition & History
The M'Naghten rule forms the foundation of the modern insanity defense plea. The test was to determine if the defendant in a criminal case knew that his or her actions were wrong and illegal at the time of the act.
9. Psychological Evaluations & the Law: Competency to Stand Trial and the Insanity Defense
Psychology and the law intersect in many ways. In this lesson, we'll look at two important parts of a trial that forensic psychologists participate in: competency hearings and the insanity defense.
10. Mistake of Fact: Definition, Forms & Cases
This lesson will teach you what constitutes a mistake of fact in the legal realm. You'll review the definition and form of mistakes of fact and then learn of two significant cases which demonstrate mistake of fact.
11. Battered Woman Syndrome: Definition & Examples
Domestic violence often goes undetected because victims are hesitant to involve outsiders in their private lives. This lesson will define battered woman syndrome that often impacts victims of domestic violence after enduring years of abuse.
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Other chapters within the Criminal Justice 107: Criminal Law course
- Criminal Law: Purposes, Scope & Sources
- Understanding the Types of Jurisdiction
- Essential Elements of a Crime
- Criminal Liability Types
- Substantive & Procedural Law
- Punishment & Sentencing in Criminal Law
- Legal Overview of Homicide
- Sexual Offenses & Offenders Overview
- Robbery, Theft, Burglary & Property Crimes
- Assault & Battery Overview
- False Imprisonment & Kidnapping
- White, Blue & Green-Collar Crime