How is motive used in criminal cases in Qld?
Introduction
In Queensland criminal law, motive refers to the reason behind an alleged offence. While motive can sometimes appear significant, it is usually not required for the prosecution to prove a charge. However, in certain serious offences such as murder or arson, motive may still become relevant when the evidence is circumstantial.
What is motive?
The courts have described motive as “the reason that nudges the will and prods the mind to indulge the criminal intent.” In simple terms, motive is why a person acts, while intent is the decision to act.
For example, a person may intentionally assault another without the prosecution needing to prove why they did it. The law focuses on proving that the act was committed intentionally or unlawfully, not the reason behind it.
Is motive necessary to prove an offence?
No. In Queensland, the prosecution generally does not need to prove motive. Section 23(3) of the Criminal Code 1899 (Qld) provides that, unless expressly stated otherwise, motive is immaterial to criminal responsibility.
This means that in offences such as:
Murder – the prosecution does not need to prove why the act occurred
Assault – the police do not need to show a reason for the attack
The primary question for the court is what happened and whether it was unlawful or intentional, not why it happened.
When can motive become relevant?
Motive may become relevant in circumstantial cases, where the prosecution relies on indirect evidence to suggest guilt. In such cases, motive can form part of the chain of reasoning the prosecution asks the jury to consider.
Examples of motive in circumstantial cases
Arson – an insurance policy taken out shortly before a suspicious fire
Fraud – evidence of financial stress suggesting a reason to obtain money dishonestly
Homicide – allegations involving jealousy, revenge, or relationship breakdown
Retaliation – prior disputes, such as a drug debt, used to suggest motive for an assault
The High Court in De Gruchy v The Queen [2002] HCA 33 confirmed that motive, if proven, may be a fact from which a jury can infer intention. Conversely, an absence of motive can sometimes assist the defence in arguing that the prosecution’s case is incomplete or lacks credibility.
Why motive is not enough on its own
Even if the prosecution presents evidence of motive, that alone is not sufficient to prove guilt. Juries are often directed that motive is only one piece of evidence and cannot, by itself, establish criminal responsibility.
In R v Gaskell [2016] QCA 302, the Queensland Court of Appeal noted that jury directions about motive depend on the specific facts of each case. Judges will typically remind jurors that strong evidence of motive does not replace the need for proof beyond reasonable doubt.
Likewise, the absence of motive does not mean a person is innocent, a conviction can still be based on other compelling evidence.
Key takeaways about motive in Qld
Motive is not required to prove most offences in Queensland.
It may arise in circumstantial cases as part of the prosecution’s reasoning.
Motive cannot alone prove guilt without supporting evidence.
A lack of motive does not automatically mean there is no case.
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Last updated November 2025.
