Actus reus by omission

Actus Reus by Omission: When Doing Nothing is a Crime

Welcome to your study notes on Actus Reus by Omission! In our previous look at the actus reus (the conduct element of a crime), we focused on positive acts—things people physically do, like punching, stealing, or driving. But did you know that in English law, you can sometimes be guilty of a crime for doing absolutely nothing?

This might seem strange at first, but don't worry. We are going to break down exactly when the law expects you to act and what happens if you don't. This is a vital part of your Paper 2: Criminal Law syllabus.

1. The General Rule: No Liability for Omissions

In England and Wales, the general rule is simple: There is no criminal liability for an omission.

Unlike some other countries, English law does not have a "Good Samaritan" law. This means that if you see a stranger drowning in a shallow pond and you choose to walk past and eat your lunch instead of helping, you have not committed a crime. Even if you could have saved them easily, you had no legal duty to act.

Why is this the rule?
The law values individual liberty. It is much easier to tell people what not to do (e.g., "Don't hit people") than to tell them what they must do (e.g., "You must help every person in trouble").

Quick Review: An omission is a failure to act. The starting point is that you are not responsible for omissions unless the law creates a specific duty.

2. The Exceptions: When Do You Have a Duty to Act?

The law only punishes an omission if the prosecution can prove that the defendant had a legal duty to act. Think of a "duty" as a legal "must." If you have a duty and you ignore it, your actus reus is complete. There are six main ways a duty can arise:

A. A Duty Arising from a Statute (Acts of Parliament)

Sometimes, Parliament passes a law that explicitly makes it a crime to fail to do something.

Example: Under s3 of the Fraud Act 2006, it is a crime to fail to disclose information that you are under a legal duty to disclose. Another common example is failing to provide a breath sample or failing to report a road traffic accident under the Road Traffic Act.

B. A Duty Arising from a Contract

If you are paid to do a job that involves protecting the public or individuals, your failure to do that job can lead to criminal liability.

Example: A lifeguard at a pool who falls asleep on duty while someone drowns, or a railway gatekeeper who fails to close the gate, leading to a collision. Because they are contractually obligated to perform these safety tasks, their omission becomes an actus reus.

C. A Duty Arising from a Relationship

The law assumes certain relationships carry an automatic duty of care. The most common example is the relationship between a parent and a minor child. If a parent fails to feed their child or get them medical help, they are liable for that omission.

D. A Duty Arising from a Voluntary Assumption of Care

If you voluntarily take on the task of looking after someone who is unable to look after themselves (perhaps because they are elderly or ill), you have "assumed" a duty. You cannot simply stop caring for them without ensuring someone else takes over.

Example: If you move an elderly, sick relative into your house to care for them but then stop providing food or medical attention, you may be liable for their injury or death because you voluntarily took on that responsibility.

E. A Duty Arising from an Official Position

This usually applies to people in public office, such as police officers. A police officer who sees a crime being committed but chooses to ignore it and walk away can be guilty of a crime (misconduct in a public office) because their official position requires them to act.

F. A Duty Arising from Creating a Dangerous Situation

If you accidentally or intentionally do something that creates a danger, you have a legal duty to take reasonable steps to stop that danger once you become aware of it.

Example: Imagine you are smoking in bed and accidentally drop a cigarette, which starts a small fire on the mattress. If you wake up, see the fire, and simply move to another room to go back to sleep instead of calling the fire brigade or trying to put it out, you are liable. By creating the dangerous situation, you triggered a duty to fix it.

3. Key Summary Table

To help you remember, here is a quick guide to the "Duty" categories:

4. Common Mistakes to Avoid

1. Thinking "Immersion" is "Omission"
Don't get the words mixed up! An omission is a failure to act. Commission is a positive act. Most crimes are committed by commission, but the exceptions above allow for omissions.

2. Moral Duty vs. Legal Duty
This is the most common pitfall. You might feel a moral duty to help a stranger, but unless you fall into one of the six categories above, there is no legal duty. In an exam scenario, always check if a specific relationship or situation exists before saying there is an actus reus.

3. Forgetting Mens Rea
Remember, actus reus is only half the puzzle. Even if someone fails in their duty (the omission), the prosecution still needs to prove they had the mens rea (the mental element, like intention or recklessness) to be guilty of a crime. (Cross-reference: See the chapters on Mens Rea for more details!)

5. "Did You Know?"

English law's refusal to punish "bad people" who fail to help strangers is often criticized by philosophers. They argue that if you can save a life at no risk to yourself, you should have a legal duty to do so. However, the law currently sticks to the "no duty" rule to keep the boundaries of criminal law clear and predictable.

6. Final Key Takeaways

• The actus reus is usually a positive act.
• An omission only counts as an actus reus if the defendant had a legal duty to act.
• If there is no legal duty, "doing nothing" is not a crime, no matter how morally wrong it seems.
• Always look for Statutes, Contracts, Relationships, Voluntary Assumptions, Official Positions, or Dangerous Situations in your Paper 2 exam scenarios!