Welcome to Criminal Law!
Hi there! Welcome to the start of your journey into Criminal Law. This first chapter, "Rules," is like the rulebook for a board game. Before we can dive into specific crimes like assault or theft, we need to understand the basic ground rules: what a crime actually is, who is involved in a trial, the underlying principles and purposes of criminal law, and how we decide if someone is "guilty."
Don’t worry if some of the Latin terms look a bit scary at first—we’ll break them down together. By the end of these notes, you'll have a solid foundation for the rest of your AS Level Law course!
1. What is a Crime?
In simple terms, a crime is any act (or sometimes a failure to act) that violates a law and is punishable by the state. Unlike civil law (which is usually about disputes between individuals, like a broken contract), criminal law is about the state protecting the public.
The Definition of Crime: An act or omission which is rendered punishable by the law. It is a wrong against society as a whole, which is why the state (the government/police) gets involved.
Example: If you punch someone in the street, you have committed a crime. The state (the Crown) will prosecute you because they want to keep the streets safe for everyone.
Key Takeaway:
A crime isn't just "doing something bad"—it is specifically doing something that a legal rule says you cannot do, or failing to do something the law says you must do.
2. Where do Criminal Rules come from? (Sources of Law)
Laws don't just appear out of thin air! In England and Wales, criminal rules come from two main places:
1. Statute Law (Acts of Parliament): These are laws written down and passed by Parliament. Most modern crimes are found here.
Example: The Offences Against the Person Act 1861 (which covers things like wounding).
2. Common Law: These are laws created by judges through their decisions in court cases over hundreds of years. This is also called "judge-made law."
Example: Murder is actually a common law crime. There isn't one single "Murder Act" that defines it; instead, the definition comes from old legal cases.
Did you know? Even though Murder is a Common Law crime, the punishment for it (a mandatory life sentence) is set by an Act of Parliament!
3. The Aims and Purpose of Criminal Law
Why do we have criminal law in the first place? The criminal justice system serves several key functions in society:
• Maintaining Public Order: Protecting society from harm and ensuring a safe, stable community.
• Deterrence: Discouraging individuals from committing crimes (individual deterrence) and dissuading the wider public (general deterrence).
• Retribution: Ensuring offenders receive just punishment proportional to the blameworthiness of their conduct ("just deserts").
• Incapacitation: Protecting the public by removing dangerous offenders from society (e.g., through prison sentences).
• Rehabilitation: Helping reform offenders so they can reintegrate and avoid reoffending.
4. Key Principles of Criminal Law
To ensure criminal law is fair and just, it operates according to essential core principles:
• Principle of Fair Warning / Legality: Criminal laws must be clear, accessible, and defined in advance so citizens know what behaviour is forbidden.
• Non-retroactivity / Maximum Certainty: A person cannot be prosecuted for an act that was not a crime when committed (laws cannot apply retrospectively).
• Proportionality: The severity of punishment should correspond fairly to the seriousness of the offence.
• Autonomy: Individuals are treated as rational beings responsible for their own voluntary actions.
5. The Recipe for a Crime: Criminal Liability
To find someone "guilty" of a crime, the prosecution usually needs to prove two main ingredients. Think of this as the formula for criminal liability:
\( \text{Actus Reus} + \text{Mens Rea} = \text{Criminal Liability} \)
A. Actus Reus (The Guilty Act)
This is the physical element of the crime. It can be a physical action (like hitting someone) or a state of affairs (like being found in possession of an illegal item).
B. Mens Rea (The Guilty Mind)
This is the mental element. Most crimes require the defendant to have a certain state of mind, like intention (meaning to do it) or subjective recklessness (taking an unjustified risk).
Analogy: Imagine you are walking in a shop and you knock over a vase.
- Actus Reus: You broke the vase (the physical act happened).
- Mens Rea: Did you do it on purpose? If it was a total accident, you might not have the "guilty mind" needed for a crime like criminal damage.
Quick Review Box:
• Actus Reus = The Action
• Mens Rea = The Mental State
• You usually need BOTH at the same time to be guilty!
6. Who is involved in a Criminal Case?
In a criminal trial, there are two main "sides":
1. The Prosecution: This is the side bringing the case against the defendant. Usually, this is the Crown Prosecution Service (CPS) acting on behalf of the State (the King). This is why cases are often called R v [Defendant’s Name]. (The 'R' stands for Rex or Regina—the King or Queen).
2. The Defence: This is the person accused of the crime (the defendant) and their legal team (solicitors and barristers). Their job is to argue that the prosecution hasn't proved the case.
7. Burden and Standard of Proof
This is one of the most important parts of the English legal system. It's all about how we prove someone is guilty.
The Burden of Proof (Who has to prove it?)
The burden of proof lies with the Prosecution. This means it is the job of the CPS to prove that the defendant committed the crime. The defendant does not have to prove they are innocent! This is known as the "Presumption of Innocence."
The Standard of Proof (How much proof do we need?)
In criminal law, the prosecution must prove the case beyond reasonable doubt (so that the jury or magistrates are sure). This is a very high standard. If the jury or magistrate has a "reasonable doubt" about whether the defendant did it, they must find them not guilty.
Memory Aid: Think of a set of scales. In a civil case (like suing someone), the scales only need to tip slightly to one side (51%). But in Criminal Law, the prosecution side must be so heavy with evidence that the scale stays firmly down. They must be sure of guilt.
What is "Reverse Onus"?
Sometimes, for specific parts of a law, the "burden" flips. Reverse onus is when the law says the defendant must prove something. This is rare and usually only applies to specific statutory provisions or defences (like the defence of "insanity").
Common Mistake to Avoid: Many students think a defendant being "innocent until proven guilty" means they have to prove they didn't do it. No! The defendant can stay completely silent, and it is still the Prosecution’s job to prove the crime happened.
Summary Checklist
Before you move on to the next chapter, make sure you can answer these questions:
- What are the two main sources of criminal law? (Statute and Common Law)
- What are the aims and principles of criminal law? (e.g. deterrence, retribution, fair warning, proportionality)
- What are the two "ingredients" needed for criminal liability? (Actus Reus and Mens Rea)
- Who has the burden of proof in a trial? (The Prosecution)
- What is the standard of proof in criminal law? (Beyond reasonable doubt)
Great job! You’ve just completed the foundation of Criminal Law. Next, we will look closer at the specific physical and mental elements that make up the Actus Reus and Mens Rea.