Slayer rule

The law of wills and trusts
Part of the common law series
Inheritance
Intestacy  · Testator  · Probate
Power of appointment
Simultaneous death  · Slayer rule
Disclaimer of interest
Types of will
Holographic will  · Will contract
Living will
Joint wills and mutual wills
Parts of a will
Codicil  · Attestation clause
Incorporation by reference
Residuary clause
Problems of property disposition
Lapse and anti-lapse
Ademption  · Abatement
Acts of independent significance
Elective share  · Pretermitted heir
Contesting a will
Testamentary capacity  · Undue influence
Types of Trusts
Express trust  · Asset-protection trust
Protective trust  · Spendthrift trust
Charitable trust  · Honorary trust
Resulting trust  · Constructive trust
Special Needs trust
Doctrines governing trusts
Pour-over will  · Cy pres doctrine
Other areas of the common law
Contract law  · Tort law  · Property law
Criminal law  · Evidence

The slayer rule, in the common law of inheritance, is a doctrine that prohibits inheritence by a person who murders someone from whom they stand to inherit. The effect of the slaying was that the slayer would be treated as though they had died before the person who had been murdered. The wrongful killing need only be proved by a preponderance of the evidence. If the slayer were later convicted of the murder, that would conclusively divest them of their interest; but if the slayer were acquitted of the murder, the court could still weigh the evidence and determine that they should be divested.

In the United States, most jurisdictions have enacted a slayer statute, which codifies the rule and supplies additional conditions.