The rule of felony murder is a legal doctrine in some common law jurisdictions that broadens the crime of murder: when someone is killed (regardless of intent to kill) in the commission of a dangerous or enumerated crime (called a felony in some jurisdictions), the offender, and also the offender's accomplices or co-conspirators, may be found guilty of murder.
The concept of felony murder originates in the rule of transferred intent, which is older than the limit of legal memory. In its original form, the malicious intent inherent in the commission of any crime, however trivial, was considered to apply to any consequences of that crime regardless of intent.
History
While there is debate about the original scope of the rule, modern interpretations typically require that the offence be an inherently dangerous one, or one committed in an obviously dangerous manner. For this reason, the felony murder rule is often justified by its supporters as a means of deterring dangerous felonies.
According to some commentators, the common law rule dates to the twelfth century and took its modern form in the eighteenth century. The modern conception of the felony murder rule arose in 1716, with William Hawkins' Treatise of Pleas of the Crown, during his work on English criminal law. Hawkins reasoned that malice was implicit in a crime that "necessarily tends to raise Tumults and Quarrels, and consequently cannot but be attended with the danger of personal hurt." Thus, "this rule should extend to killings in the course of felonies à fortiori."
Elements
In most jurisdictions, to qualify as an underlying offense for a felony murder charge, the underlying offense must present a foreseeable danger to life, and the link between the offense and the death must not be too remote. For example, if the recipient of a forged check has a fatal allergic reaction to the ink, most courts will not hold the forger guilty of murder, as the cause of death is too remote from the criminal act.
There are two schools of thought concerning whose actions can cause the defendant to be guilty of felony murder. Jurisdictions that hold to the "agency theory" admit only deaths caused by the agents of the crime. Jurisdictions that use the "proximate cause theory" include any death, even if caused by a bystander or the police, provided that it meets one of several proximate cause tests to determine if the chain of events between the offence and the death was short enough to have legally caused the death.
The merger doctrine excludes from the offenses that qualify as underlying offenses any felony that is presupposed by a murder charge. For example, nearly all murders involve some type of assault, but so do many cases of manslaughter. To count any death that occurred during the course of an assault as felony murder would obliterate a distinction that is carefully set by the legislature. However, merger may not apply when an assault against one person results in the death of a different person.
Felony murder is typically the same grade of murder as premeditated murder and carries the same sentence as is used for premeditated murder in the jurisdiction in question.
By country
The felony murder rule has been abolished in England and Wales and in Northern Ireland. In Canada, it has been held to be unconstitutional, as breaching the principles of fundamental justice. In some jurisdictions, the common law felony murder (called constructive murder) rule has been abolished, but has been replaced by a similar statutory provision (such as in Victoria, Australia with the Crimes Act 1958). Similarly, in New South Wales, common law has been overridden and the question needs only be dealt with through statutory construction and application.
Australia
In New South Wales, § 18(1)(a) of the Crimes Act 1900 provides the statutory definition of 'constructive murder'. The act or omission causing death must be "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". The rationale is to discourage acts of felony which are dangerous to human life.