General Defences in Criminal Law
Introduction
In criminal law, a person is generally held responsible for his acts. However, in some situations, the law excuses or justifies the act. These are called general defences (legal reasons to avoid liability).
These defences are recognised under Chapter IV of the Indian Penal Code, 1860 (Sections 76–106) and continue in substance under the Bharatiya Nyaya Sanhita, 2023.
Meaning / Definition
General defences are legal grounds on which a person is not held criminally liable, even if the act appears to be an offence.
These defences are based on the idea that:
- Either the accused had no guilty mind (mens rea), or
- The act was justified under the circumstances
They are broadly classified into:
- Excusable Defences: No liability due to absence of guilty mind
- Justifiable Defences: Act is allowed by law under certain conditions
Modes or Types
Mistake of Fact and Mistake of Law
-
Mistake of Fact: A person acts under a wrong belief of facts.
- Defence is allowed if the mistake is genuine and reasonable.
-
Mistake of Law: Ignorance of law is not a defence.
- Everyone is expected to know the law.
Accident
- An act done without intention or knowledge, during a lawful act, is not an offence.
- There must be proper care and caution.
Example: Injury caused while doing a lawful activity carefully.
Necessity
- An act done to prevent a greater harm is justified.
- It involves choosing the lesser harm.
Example: Breaking a door to save someone from fire.
Infancy
- Children below a certain age are not held liable.
Key points:
- Below 7 years: No criminal liability (absolute protection).
- Between 7–12 years: Liability depends on maturity (ability to understand consequences).
Insanity
- A person of unsound mind (unable to understand the act) is not liable.
Key requirement:
- The person must be incapable of knowing:
- Nature of the act, or
- That the act is wrong or illegal
Intoxication
- Intoxication means being under the influence of alcohol or drugs.
Types:
- Involuntary intoxication: Defence available (no control).
- Voluntary intoxication: Generally not a defence.
Private Defence
- Right to protect one’s body or property against harm.
Key conditions:
- There must be immediate threat.
- Force used must be reasonable and necessary.
- Cannot be used as revenge.
Distinction / Comparison
| Basis | Excusable Defences | Justifiable Defences |
|---|---|---|
| Meaning | No liability due to absence of guilty mind | Act is allowed by law |
| Nature | Act is not blameworthy | Act is lawful under circumstances |
| Examples | Infancy, insanity, mistake of fact | Private defence, necessity |
| Basis | Mistake of Fact | Mistake of Law |
|---|---|---|
| Defence | Allowed | Not allowed |
| Reason | No guilty intention | Law must be known |
| Example | Believing property is own | Ignorance of legal rule |
Practical Example
A sees B attacking him with a knife and hits B to protect himself.
- This act falls under private defence.
- Even though harm is caused, A is not criminally liable if force used is reasonable.
Summary
- General defences remove or reduce criminal liability.
- They are based on absence of guilty mind or lawful justification.
- Excusable defences include infancy, insanity, and mistake of fact.
- Justifiable defences include necessity and private defence.
- Mistake of law is not a valid defence.
- Private defence allows protection of body and property under threat.