This is the full-content study version of Chapter 1 — read it for revision or self-study. Your teacher will teach from the matching slide deck. Deeper case treatment and essay practice live in the Crime Study Guide. Everything here maps to the NESA Crime syllabus dot points under "The nature of crime."
Syllabus: the meaning of crime.
A crime is any act or omission that is against the community at large, made punishable by the state, and considered serious enough to warrant public (rather than merely private) response. Crime is the concern of public law: the state prosecutes on behalf of the community.
| Criminal law | Civil law | |
|---|---|---|
| Purpose | Protect society; punish wrongdoing against the community | Resolve disputes between individuals; provide a remedy |
| Parties | The Crown / State (R, DPP) v the accused | Plaintiff v defendant |
| Standard of proof | Beyond reasonable doubt | On the balance of probabilities |
| Outcome | Punishment (e.g. imprisonment, fine) | Remedy (e.g. damages, injunction) |
Keep the two standards of proof straight — a favourite multiple-choice trap. Criminal = beyond reasonable doubt (very high, because liberty is at stake); civil = balance of probabilities (more likely than not).
Syllabus: the elements of crime: actus reus, mens rea.
For most serious offences the prosecution must prove two elements beyond reasonable doubt: the guilty act and the guilty mind. Both must exist and coincide.
The physical, voluntary act or omission that makes up the offence — e.g. the physical act of striking the victim in an assault. The act must be voluntary; an involuntary movement (a reflex, a spasm) is generally not an actus reus.
The intention or state of mind of the accused. Proving mens rea shows the accused meant to commit the crime, or was reckless or negligent as to the consequences. There are three levels:
Split the Latin by its first three letters: ACTus reus = the ACT. MENs rea = the MENtality. Useful for multiple choice.
Parents were convicted of manslaughter by criminal negligence over the death of their nine-month-old daughter, who suffered severe eczema. They relied almost entirely on homeopathic treatment and withheld conventional medicine as her condition became critical. The court held they had grossly breached their duty to protect their child.
Syllabus: strict liability offences.
A strict liability offence requires the prosecution to prove only the actus reus — no mens rea is needed. Because the burden of proof is lower, strict liability is reserved for minor, regulatory offences where efficient enforcement matters and the penalty is modest.
A limited defence may apply where the accused held an honest and reasonable (but mistaken) belief in a set of facts which, if true, would make the act innocent.
Strict liability trades a lower proof threshold for administrative efficiency and equality before the law (everyone is treated the same, regardless of intent). Use it to discuss the theme of discretion — police still choose whether to issue a fine.
Syllabus: causation.
Causation is the link between the accused's act and the resulting harm. Where an offence requires a particular result (such as death in homicide), the prosecution must prove that the accused's act substantially caused that result — an unbroken "chain of causation".
Todd Munter struck Terrence Proctor once during a dispute; Proctor fell, and died a short time later. Although Munter did not intend to kill, the court found his unlawful assault was the substantial cause of death, establishing the causal link for manslaughter. Munter was imprisoned.
Syllabus: categories of crime — offences against the person, economic offences (property / white-collar / computer), drug offences, driving offences, public order offences, preliminary crimes; offences against the sovereign.
| Category | Examples |
|---|---|
| Offences against the person | Homicide (murder, manslaughter, infanticide), assault, sexual assault |
| Offences against the sovereign | Treason, sedition, terrorism |
| Economic offences | Property (larceny, robbery, break & enter), white-collar (embezzlement, tax evasion, insider trading), computer offences, fraud |
| Drug offences | Use, possession, cultivation, supply, trafficking |
| Driving offences | Speeding, drink/drug driving, negligent & dangerous driving |
| Public order offences | Offensive conduct/language, affray, custody of a knife in public |
| Preliminary (inchoate) offences | Attempts, conspiracy |
The unlawful killing of another person — an umbrella term covering murder, manslaughter, infanticide, and dangerous driving occasioning death. Causation must always be established.
The most serious homicide, carrying a maximum penalty of life imprisonment (Crimes Act 1900 (NSW) s 18). To establish murder the prosecution must prove one of four alternative mental states accompanying the act:
Roger Dean, a nurse, lit fires at the Quakers Hill nursing home in 2011; 11 elderly residents died. He was convicted of murder and received a life sentence.
Introduced a mandatory life sentence for the murder of a police officer in certain circumstances — a controversial limit on judicial discretion in sentencing.
An unlawful killing that lacks the intent required for murder, carrying a maximum of 25 years. Three types:
Applies where a biological mother causes the death of her child under 12 months while her mind was disturbed by the effects of giving birth (e.g. post-natal depression) — treated more leniently than murder as a mitigated form of homicide under the Crimes Act 1900 (NSW).
The infliction of, or threat of, immediate unlawful physical force. Common assault (Crimes Act 1900 (NSW) s 61) carries up to 2 years. Sexual assault covers non-consensual sexual intercourse, including where consent is withdrawn during intercourse. Aggravated sexual assault in company (s 61JA), introduced in 2001, is among the most serious sexual offences and carries a maximum of life imprisonment.
Where a person drives dangerously (e.g. under the influence, or grossly exceeding the speed limit) and causes death — up to 10 years, or 14 years in aggravated circumstances (Crimes Act 1900 (NSW) s 52A).
Among the oldest offences, protecting the authority and security of the state.
Expanded detention and investigation powers for terrorism — a recurring balance between community safety and individual rights (a Crime theme).
Computer offences involve unauthorised access to or modification of data (hacking). Fraud is deceitful conduct for personal gain — increasingly digital (identity theft, phishing).
Acts involving prohibited or restricted drugs — use, possession, cultivation, supply and trafficking. Penalties escalate from users (diversion, bonds, rehabilitation) to suppliers and traffickers (long custodial sentences), reflecting the wider community harm of supply.
Richard Buttrose was sentenced to 12 years 6 months for supplying cocaine worth over $10 million — illustrating the heavy penalties reserved for large-scale supply.
Frequently strict liability, because the act is easy to prove and enforce on the spot. Common examples: speeding, using a mobile while driving, drink/drug driving, driving unlicensed or disqualified. Dealt with by fines, licence loss, and — for serious cases — imprisonment.
Acts disturbing public peace and order — offensive conduct or language, affray, and custody of a knife in a public place without reasonable excuse. Many are found in the Summary Offences Act 1988 (NSW). Police "move on" directions are a common enforcement tool, raising questions of discretion.
Syllabus: summary and indictable offences.
Syllabus: preliminary crimes — attempt and conspiracy.
Preliminary offences show the law intervening before harm occurs — a point about crime prevention and the balance between individual liberty and community protection.
Syllabus: parties to a crime — principal in the first/second degree; accessory before/after the fact.
| Party | Role |
|---|---|
| Principal in the first degree | The person who actually commits the criminal act. |
| Principal in the second degree | Present at the scene and assists or encourages the principal (e.g. a lookout). |
| Accessory before the fact | Helps plan or prepare the crime but is not present when it is committed. |
| Accessory after the fact | Assists the offender after the crime (e.g. hiding them or destroying evidence). |
Syllabus: factors affecting criminal behaviour.
No single cause explains crime; the syllabus expects a range of interacting factors:
Syllabus: crime prevention — situational and social.
You should be able to: define crime and distinguish it from civil law; explain actus reus and the three levels of mens rea; explain strict liability and causation; classify the categories of crime with an example each; distinguish summary/indictable and the preliminary offences; list the parties to a crime; and evaluate situational vs social crime prevention. Test yourself in the Crime Study Guide → Self-Test.