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Charged with Murder or Manslaughter? What You Need to Know
Murder and manslaughter are the two homicide offences defined in section 18 of the Crimes Act 1900 (NSW). Murder carries a maximum penalty of life imprisonment, and manslaughter a maximum of 25 years.
The difference between the two charges is the accused’s state of mind. Murder requires an intention to kill or inflict grievous bodily harm, reckless indifference to human life, or a death caused during a serious crime. Every other punishable homicide is manslaughter, including a death caused by an unlawful and dangerous act or by criminal negligence.
A murder charge can be reduced to manslaughter where a partial defence applies, such as extreme provocation, substantial impairment, or excessive self-defence. Where self-defence is raised and the prosecution cannot disprove it, the result is a complete acquittal.
Homicide charges are prosecuted by the Office of the Director of Public Prosecutions and tried before a Judge and jury. Murder is a show cause offence under the Bail Act 2013 (NSW), which means you must show why your detention is not justified.
The Australian Legal Practice’s murder and manslaughter lawyers act for clients from our Burwood, Sydney CBD, and Parramatta offices. Our lawyers are available 24/7, and the first consultation is free.
Call (02) 8084 9929 to arrange a free consultation with a principal lawyer.
What Are Murder and Manslaughter?
Both offences involve causing the death of another person through a voluntary act or omission.
Murder is committed where the act or omission causing death was done:
- With intent to kill
- With intent to inflict grievous bodily harm
- With reckless indifference to human life, meaning the accused was aware that death was a probable result
- In an attempt to commit, or during or immediately after, a crime punishable by imprisonment for life or 25 years, known as constructive murder
Manslaughter covers every other punishable homicide. The law recognises 5 categories:
Category | Type | What It Involves |
Extreme provocation | Voluntary manslaughter | The elements of murder are present, but the act causing death was a response to extreme provocation by the deceased |
Substantial impairment | Voluntary manslaughter | The elements of murder are present, but the accused’s capacity to understand events, judge right from wrong, or control themselves was substantially impaired by a mental health or cognitive impairment |
Excessive self-defence | Voluntary manslaughter | The accused used force in self-defence, but the force was not a reasonable response in the circumstances as the accused perceived them |
Unlawful and dangerous act | Involuntary manslaughter | An intentional, unlawful act that a reasonable person in the accused’s position would have realised exposed another person to a risk of serious injury |
Criminal negligence | Involuntary manslaughter | A breach of a legal duty of care that fell far short of the standard of a reasonable person and involved a high risk of death or really serious bodily harm |
Situations that can lead to a murder or manslaughter charge include:
- A single punch that causes the victim to fall and suffer a fatal head injury
- A fight or confrontation where force used in self-defence went beyond what was reasonable
- A death during a robbery or other serious crime, which can be charged as constructive murder
- A death caused by a grossly negligent act or omission of a person who owed the deceased a legal duty of care
- A workplace death caused by the grossly negligent conduct of a business or one of its officers
Murder and manslaughter are distinct from several related offences:
- Assault causing death (section 25A): intentionally hitting another person, with any part of the body or an object held, where the assault causes death. The prosecution does not need to prove that death was reasonably foreseeable
- Infanticide (section 22A): where a mother causes the death of her child under 12 months while the balance of her mind was disturbed by the effects of giving birth or lactation. Infanticide is punished as manslaughter
- Industrial manslaughter (section 34C Work Health and Safety Act 2011): grossly negligent conduct by a person conducting a business or undertaking, or an officer, that breaches a work health and safety duty and causes the death of a worker. The offence commenced on 16 September 2024
- Dangerous driving occasioning death (section 52A): a separate driving offence, which a jury can return as an alternative verdict on a manslaughter charge
Murder and Manslaughter Under Australian Law
Section 18(1) of the Crimes Act 1900 (NSW) provides:
“(a) Murder shall be taken to have been committed where the act of the accused, or thing by him or her omitted to be done, causing the death charged, was done or omitted with reckless indifference to human life, or with intent to kill or inflict grievous bodily harm upon some person, or done in an attempt to commit, or during or immediately after the commission, by the accused, or some accomplice with him or her, of a crime punishable by imprisonment for life or for 25 years. (b) Every other punishable homicide shall be taken to be manslaughter.”
Section 18(2) adds 2 limits. An act done with lawful cause or excuse falls outside the section, and a person who kills another “by misfortune only” incurs no punishment.
Offence | Section | Maximum Penalty |
Murder | s 19A Crimes Act 1900 | Life imprisonment |
Murder of a police officer in the execution of duty | s 19B Crimes Act 1900 | Mandatory life imprisonment |
Manslaughter | s 24 Crimes Act 1900 | 25 years imprisonment |
Infanticide | s 22A Crimes Act 1900 | Punished as manslaughter |
Assault causing death | s 25A(1) Crimes Act 1900 | 20 years imprisonment |
Assault causing death while intoxicated (offender aged 18 or over) | s 25A(2) Crimes Act 1900 | 25 years imprisonment, with a mandatory minimum of 8 years |
Industrial manslaughter | s 34C Work Health and Safety Act 2011 | 25 years imprisonment for an individual; $20 million fine for a body corporate |
Jurisdiction and court:
- Murder and manslaughter are strictly indictable offences and cannot be finalised in the Local Court
- The matter begins in the Local Court, where committal proceedings take place before the matter moves to a higher court
- Murder trials are heard in the Supreme Court of NSW
- Manslaughter trials are heard in the District Court or the Supreme Court
- On a murder trial, the Judge must leave manslaughter to the jury as an alternative verdict, even where one or both parties object
- Murder is a show cause offence under section 16B of the Bail Act 2013 (NSW), as an offence punishable by life imprisonment
- Manslaughter becomes a show cause offence in specific circumstances, for example where the accused has a prior conviction for a serious personal violence offence or was on bail or parole at the time
What Must the Prosecution Prove?
To secure a murder conviction, the prosecution must prove each of the following elements beyond reasonable doubt:
- The death of the deceased was caused by an act or omission of the accused
- The act or omission was voluntary
- The accused acted with intent to kill, intent to inflict grievous bodily harm, or reckless indifference to human life, or the act occurred during or immediately after a crime punishable by life or 25 years imprisonment
For manslaughter by an unlawful and dangerous act, the prosecution must prove:
- The death was caused by a voluntary act of the accused
- The accused intended to commit that act
- The act was unlawful
- The act was dangerous, meaning a reasonable person in the accused’s position would have realised it exposed another person to a risk of serious injury
For manslaughter by criminal negligence, the prosecution must prove:
- The accused owed the deceased a legal duty of care
- An act or omission of the accused caused or accelerated the death
- The conduct fell so far short of the standard of care a reasonable person would have exercised that it involved a high risk of death or really serious bodily harm
If the prosecution cannot prove any one of these elements, the court must find you not guilty of that charge.
The burden of proof differs between defences:
- Self-defence and excessive self-defence: once raised, the prosecution must prove beyond reasonable doubt that the accused did not act in self-defence (section 419)
- Extreme provocation: if there is any evidence of extreme provocation, the prosecution must prove beyond reasonable doubt that the act causing death was not a response to it (section 23(7))
- Substantial impairment: the onus is on the accused to prove the partial defence (section 23A(4))
Penalties for Murder and Manslaughter in NSW
Where a life sentence is not imposed for murder, the court must take into account the standard non-parole period for the offence:
Murder Category | Maximum Penalty | Standard Non-Parole Period |
Murder (general) | Life imprisonment | 20 years |
Murder of a child under 18 | Life imprisonment | 25 years |
Murder of a police officer, emergency services worker, correctional officer, judicial officer, health worker, teacher, community worker, or other public official, where the offence arose because of the victim’s occupation | Life imprisonment | 25 years |
Murder of a police officer in the execution of duty (s 19B) | Mandatory life imprisonment | Not applicable |
Manslaughter | 25 years imprisonment | None |
Key sentencing rules:
- Life imprisonment for murder: under section 61 of the Crimes (Sentencing Procedure) Act 1999, the court must impose a life sentence where the level of culpability is so extreme that the community interest in retribution, punishment, community protection, and deterrence can only be met by that sentence
- No standard non-parole period for manslaughter: the NSW Judicial Commission describes manslaughter as ranging “from a joke gone wrong to facts just short of murder”
- No Intensive Correction Order: section 67 of the Crimes (Sentencing Procedure) Act 1999 excludes murder and manslaughter from ICOs
Factors that influence the severity of the penalty:
- The mental element is proven. An intent to kill is generally treated as more serious than an intent to inflict grievous bodily harm
- Aggravating features such as a contract killing, brutality, torture, or a domestic violence context
- Use of a weapon and the vulnerability of the victim
- Whether the conduct was spontaneous or planned
- Mental health or cognitive impairment at the time of the offence
- Genuine remorse and the timing of any guilty plea
Discounts for a guilty plea under section 25D of the Crimes (Sentencing Procedure) Act 1999:
- 25 per cent: plea accepted during committal proceedings
- 10 per cent: plea entered at least 14 days before trial, or at the first available opportunity
- 5 per cent: in all other cases
Other consequences of a conviction include:
- A criminal record affecting employment and travel
- Immigration consequences for non-citizens under the character test in the Migration Act 1958
Possible Defences Against Murder and Manslaughter
Defence | Source of Law | Applies To | Result |
Self-defence | s 418 Crimes Act 1900 | Murder and manslaughter | Complete acquittal |
Excessive self-defence | s 421 Crimes Act 1900 | Murder | Not guilty of murder, guilty of manslaughter |
Extreme provocation | s 23 Crimes Act 1900 | Murder | Not guilty of murder, guilty of manslaughter |
Substantial impairment | s 23A Crimes Act 1900 | Murder | Not guilty of murder, guilty of manslaughter |
Mental health or cognitive impairment | s 28 Mental Health and Cognitive Impairment Forensic Provisions Act 2020 | Murder and manslaughter | Special verdict of “act proven but not criminally responsible” |
Duress | Common law | Manslaughter only | Complete acquittal |
Conditions and limits on these defences:
- Self-defence: in section 420, self-defence is excluded where the accused inflicted death to protect property
- Extreme provocation: relates directly to the deceased’s conduct. The said conduct must have equated to a serious indictable offence, caused the accused to lose self-control, and been capable of causing an ordinary person to lose self-control to the extent of intending to kill or inflict grievous bodily harm. The conduct does not need to have occurred immediately before the act causing death
- Extreme provocation exclusions: the defence is unavailable where the conduct was only a non-violent sexual advance, or where the accused incited the conduct to create an excuse for violence
- Substantial impairment: the effects of self-induced intoxication are disregarded
- Mental health or cognitive impairment: applies where the accused did not know the nature and quality of the act, or did not know it was wrong. A special verdict is not tied to a fixed minimum or maximum period rather, it usually leads to detention and review by the Mental Health Review Tribunal
- Duress: unavailable on a charge of murder
Other grounds of defence include:
- Causation: the accused’s act did not cause the death
- No intent: the prosecution cannot prove the mental element for murder, leaving manslaughter as the alternative verdict
- Misfortune: under section 18(2)(b), the death was only a direct result of misfortune
- Identity: the accused was not the person responsible for the death
Every defence is assessed on the specific facts, including forensic and medical evidence, CCTV, witness accounts, expert psychiatric reports, and any admissions made during a police interview.
Your Options When Charged with Murder or Manslaughter
Option | What It Means |
Negotiate with the prosecution | Where intent is contestable or a partial defence is available, representations to the ODPP can result in the prosecution accepting a plea to manslaughter in place of murder, or amending the agreed facts |
Plead not guilty | Contest the charge at a jury trial, where the prosecution must prove every element beyond reasonable doubt and disprove self-defence and extreme provocation once raised |
Plead guilty and seek the best outcome | A plea accepted during committal proceedings attracts a 25 per cent discount; psychiatric reports and evidence of remorse are relevant to the head sentence and non-parole period |
Why Choose The Australian Legal Practice for Murder and Manslaughter Charges
- Principal-level representation. You deal directly with an experienced senior lawyer
- 24/7 availability on (02) 8084 9929. Police can arrest or request an interview at any hour
- Three Sydney offices: Burwood, Sydney CBD, and Parramatta
- Free and confidential initial consultation
- Experience preparing show cause bail applications for homicide charges
- Experience assessing partial defences to murder, with expert psychiatric evidence where relevant
- Experience negotiating with the ODPP for a murder charge to be resolved as manslaughter where the evidence supports it
Call (02) 8084 9929 to arrange a free consultation with a principal lawyer.
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Frequently Asked Questions About Murder and Manslaughter
The difference is the accused’s state of mind. Murder requires an intent to kill or inflict grievous bodily harm, reckless indifference to human life, or a death caused during a crime punishable by life or 25 years imprisonment. Every other punishable homicide is manslaughter.
Yes. A jury can return a manslaughter verdict where a partial defence applies or where the prosecution cannot prove the mental element for murder. The ODPP can also accept a plea to manslaughter in place of murder.
Murder is a show cause offence under the Bail Act 2013 (NSW). You must show why your detention is not justified before the court considers the usual bail risks. Manslaughter is a show cause offence only in specific circumstances, such as a prior conviction for a serious personal violence offence.
It depends on the evidence. A fatal single punch can be charged as manslaughter by an unlawful and dangerous act, or as assault causing death under section 25A of the Crimes Act 1900. Assault causing death carries a maximum of 20 years imprisonment, rising to 25 years with a mandatory minimum of 8 years where the offender was 18 or over and intoxicated.
The matter starts in the Local Court for committal proceedings. Murder trials are heard in the Supreme Court of NSW, and manslaughter trials are heard in the District Court or the Supreme Court.
Speak to a criminal defence lawyer today on (02) 8084 9929 or book a free consultation online.
