How the Slayer Rule Blocks Killers from Inheriting

What Is the Slayer Rule in Inheritance Law and How Does It Work?

The slayer rule in inheritance law bars anyone who feloniously and intentionally kills a decedent from receiving any benefit from that death. No will, trust, beneficiary designation, or joint tenancy can override it. The rule operates across probate and non-probate assets alike, and its reach extends well beyond what most estate plans explicitly address.

The foundational case is New York Mutual Life Insurance Co. v. Armstrong, decided by the U.S. Supreme Court in 1886. The Court held that a murderer cannot collect life insurance proceeds on the life of the person he killed, establishing the federal common law basis for the modern rule. Three years later, the New York Court of Appeals reinforced the principle in Riggs v. Palmer, ruling that a grandson who murdered his grandfather to prevent a will change could not inherit under that will. No person should profit from their own wrong. That principle has held for 135 years.

Today, the Uniform Probate Code Section 2-803 provides the model framework, barring a killer from inheriting through intestacy, a will, a trust, or a beneficiary designation. A majority of U.S. states have adopted it in whole or in part.

For most people, this is a legal curiosity. For someone with a $10M estate, a contested slayer proceeding is an operational risk that can freeze asset distribution for years, trigger estate tax penalties, and create liquidity crises at exactly the wrong moment.

Which States Have Codified the Slayer Rule in Their Probate Statutes?

As of 2024, approximately 45 states and the District of Columbia have enacted some statutory version of the slayer rule. The scope varies dramatically. Some states limit the rule to first-degree murder. Others extend it to any felonious and intentional killing. A handful apply it to reckless homicide.

For individuals holding assets across multiple states, that variation matters. Real property follows the law of the state where it sits. A vacation home in Florida, a primary residence in California, and a business interest held through a Delaware LLC can each be governed by a different slayer statute.

The table below covers the states most relevant to high-net-worth asset holders.

California's Probate Code Section 250 is among the broadest: it explicitly bars any person who feloniously and intentionally kills a decedent from receiving any property, interest, or benefit under the estate or any instrument. New York's EPTL Section 4-1.6 addresses jointly held property specifically, converting the joint tenancy into a tenancy in common for distribution purposes when one co-owner feloniously kills the other.

Multi-state asset holders need estate plans with explicit choice-of-law provisions that specify which state's slayer rule governs each asset class. Without that language, courts decide, and courts in different states may reach different conclusions about the same estate.

Does the Slayer Rule Apply If the Killer Is Acquitted in Criminal Court?

Yes. This is the planning gap that catches most estates off guard.

The criminal standard is beyond reasonable doubt. The probate standard is preponderance of the evidence, meaning more likely than not. A killer acquitted in criminal court can still be barred from inheriting if a probate court independently finds, by that lower civil standard, that they caused the death.

The O.J. Simpson estate litigation illustrated this principle at scale. Simpson was acquitted criminally but found liable civilly. The same evidentiary asymmetry applies in probate proceedings. A beneficiary walks free from criminal court and still loses the inheritance.

For estates above the federal estate tax exemption (currently $13.61 million per individual in 2024), a contested slayer proceeding that runs two or three years creates a compounding problem. The estate cannot distribute assets. Tax deadlines do not pause. Penalties accrue. Liquidity that was structured to cover estate tax obligations sits frozen while litigation proceeds.

Naming robust contingent beneficiaries and using irrevocable trusts with independent trustees is the structural answer. It ensures assets flow correctly even during prolonged litigation, without requiring a court to resolve the slayer question before any distribution occurs.

Does the Slayer Rule Apply to Life Insurance Beneficiary Designations?

It does, and this is where the rule creates the most acute risk for high-net-worth estates.

Life insurance, IRAs, 401(k)s, and other non-probate assets pass by beneficiary designation, outside the will entirely. The slayer rule reaches all of them. The Uniform Probate Code Section 2-803 explicitly covers beneficiary designations, and most state statutes follow suit.

The specific structure that creates the greatest vulnerability is the Irrevocable Life Insurance Trust (ILIT) where the insured's spouse is both the primary beneficiary and the trustee. If the spouse is implicated in the insured's death, the ILIT may be frozen pending a probate court determination. The contingent beneficiaries, typically the children, lose access to the liquidity that was specifically structured to pay estate taxes.

That is not a theoretical risk. It is a structural flaw in a common estate planning design.

The fix is straightforward but requires intentional drafting:

• Designate an independent corporate trustee for the ILIT, not a family member who is also a beneficiary
• Include explicit slayer rule contingency language in the trust document, with automatic trustee succession provisions
• Name specific contingent beneficiaries for every life insurance policy and retirement account, not just "my estate" or a generic class
• Review beneficiary designation forms annually, particularly after any change in family relationships

Under IRC Section 2035, life insurance proceeds transferred within three years of death may be pulled back into the taxable estate. In a slayer rule scenario where policy ownership and beneficiary designations are contested, that three-year lookback can compound the tax exposure significantly.

How Does the Slayer Rule Affect Irrevocable Trusts and Trust Beneficiaries?

The slayer rule's interaction with irrevocable trusts is more complex than its application to outright bequests, and the American Bar Association's Real Property, Trust and Estate Law Section has noted that courts must often look beyond the instrument itself to determine whether a killer-beneficiary can be substituted or whether assets pass to contingent beneficiaries.

The core question is whether the trust document anticipated the scenario. Most do not.

When a primary beneficiary is barred under the slayer rule, the trust instrument controls what happens next. If the document names a contingent beneficiary, assets flow there. If it does not, or if the contingent beneficiary is also implicated, the court must interpret the settlor's intent. That process takes time and money, and it happens while the trust is frozen.

For trustee succession and legal implications, the same logic applies. If the trustee is also the primary beneficiary and is subject to a slayer proceeding, the trust needs a clear mechanism for replacing that trustee without court intervention.

Specific drafting provisions that address this risk:

• An explicit "slayer contingency" clause that automatically redirects distributions if any beneficiary is subject to a slayer rule proceeding, not just a final determination
• Independent corporate trustee designation with automatic succession
• A trust protector role with authority to modify beneficiary designations in response to changed circumstances
• Separate trusts for separate beneficiaries, rather than a single trust with multiple beneficiaries, to prevent one contested beneficiary from freezing distributions to others

The deed of inheritance documentation and formal transfer records also matter here. Courts examining slayer rule claims will scrutinize the chain of title and the timing of any asset transfers relative to the death.

How the Slayer Rule Intersects with Multi-State and Digital Assets

Multi-state asset holders face a patchwork of rules that can produce conflicting outcomes for the same estate. Real property follows the situs state. Personal property generally follows the decedent's domicile. Business interests held through entities add another layer, since the entity's state of formation may have its own rules.

For someone with a primary residence in New York, a vacation home in Florida, a ranch in Texas, and investment properties in California, four different slayer statutes potentially apply to four different asset classes. Florida's statute is notably narrower than California's, requiring a criminal conviction in most circumstances rather than accepting a civil preponderance finding.

Digital assets add a dimension that existing statutes have not fully addressed. The Uniform Disposition of Community Property Act and the Uniform Probate Code's slayer provisions do not automatically cover cryptocurrency, assets held in decentralized autonomous organizations (DAOs), or smart contract-based inheritance mechanisms. Probate courts in several states have not yet ruled on whether slayer rule forfeiture extends to private wallet keys.

For individuals with significant digital asset holdings, relying on a smart contract inheritance tool is not sufficient. Those mechanisms may not be subject to court-ordered forfeiture under the slayer rule, which creates the perverse outcome of a killer receiving digital assets that a court has ordered forfeited. Estate plans should include explicit language in trust documents and beneficiary designation forms that addresses digital assets by category, not just by account.

Common inheritance problems and disputes in multi-state estates are already complex before a slayer rule claim enters the picture. Adding one transforms a probate administration into multi-jurisdictional litigation.

Can a Person Convicted of Manslaughter Still Inherit Under the Slayer Rule?

The answer depends on jurisdiction, and the variation is significant.

Most states that follow the Uniform Probate Code model apply the slayer rule to any felonious and intentional killing. Voluntary manslaughter typically qualifies. Involuntary manslaughter is less clear. Some states explicitly exclude it; others leave it to judicial interpretation.

The Pennsylvania Supreme Court's decision in In re Estate of Mahoney extended the slayer rule to voluntary manslaughter, reflecting a broader view of culpability. That approach has been influential but is not universal.

The more practically relevant question for estate planning is what happens when the killing is ambiguous: a DUI fatality where the driver inherits from the victim, a caregiver whose negligence accelerates a patient's death, or an assisted suicide in a jurisdiction where it remains illegal. Courts have reached different conclusions in each category.

Caregiver inheritance rights and complications represent a growing area of litigation, particularly in estates involving elderly decedents. Some jurisdictions have extended slayer rule principles to cases of financial elder abuse that contributes to death, even without a direct homicide charge.

The practical implication for estate planning is that "murder" is too narrow a frame. Drafting slayer contingency provisions that reference "any felonious or intentional act contributing to the death of the settlor" is broader and more protective than language that requires a specific criminal conviction.

How Should High-Net-Worth Individuals Structure Estate Plans to Account for Slayer Rule Contingencies?

The slayer rule is not a reason to redesign an estate plan from scratch. It is a reason to audit the existing plan for single points of failure and add contingency provisions that activate automatically, without requiring court intervention.

The table below maps common estate planning structures against their slayer rule vulnerability.

Specific steps worth taking with your estate planning attorney:

Audit beneficiary designations. Every life insurance policy, IRA, 401(k), and annuity should have a named contingent beneficiary. "My estate" is not an acceptable contingent designation for a non-probate asset in a slayer rule scenario.

Add slayer contingency language to trust documents. The provision should trigger on the initiation of a slayer proceeding, not just a final determination. Waiting for a court ruling before redirecting distributions can take years.

Use independent corporate trustees for ILITs and dynasty trusts. A family member who is also a beneficiary creates a structural conflict that a slayer proceeding will exploit.

Consider choice-of-law provisions. For multi-state asset holders, explicitly designating which state's law governs each trust and each asset class reduces the risk of conflicting outcomes.

Review the plan after any significant change in family relationships. Divorce, remarriage, estrangement, and new dependents all change the risk profile.

Creative estate planning strategies that use multiple trust structures and independent fiduciaries are not just tax planning tools. They are also the most effective structural defense against slayer rule complications.

For guidance on proper inheritance money distribution procedures when a slayer rule claim is pending, the executor's primary obligation is to preserve assets and seek court guidance before making any distribution to a potentially barred beneficiary.

The Global Picture: How Other Jurisdictions Handle the Same Problem

The slayer rule is not uniquely American. Most developed legal systems have an equivalent principle, though the mechanics differ.

The United Kingdom codifies the principle as the "forfeiture rule" under the Forfeiture Act 1982. Unlike the U.S. model, the UK Act gives courts explicit discretion to modify the forfeiture effect in certain circumstances, allowing a court to grant partial relief where the strict application of the rule would produce an unjust outcome. British succession and estate law also involves the Inheritance Act 1975, which allows dependants to make claims against an estate regardless of the will's terms, adding another layer of complexity when forfeiture is in play.

France uses the concept of indignité successorale (unworthiness to inherit), which operates through a court declaration and covers a broader range of misconduct than just homicide, including certain acts of violence or neglect toward the decedent.

For individuals with assets or beneficiaries in multiple countries, the interaction between different national rules creates genuine planning complexity. A trust governed by Delaware law may hold assets in the UK. A French national may be a beneficiary of a California trust. The statute of limitations on inheritance claims also varies by jurisdiction, affecting when a slayer rule challenge can be raised.

The practical implication is that cross-border estates need counsel in each relevant jurisdiction, not just the decedent's home state. The legal ownership of inherited assets in a cross-border context can be genuinely ambiguous when two different national slayer rules produce different outcomes for the same beneficiary.

Practical Takeaways for Estate Planning Under the Slayer Rule

The slayer rule sits at the intersection of criminal law, probate law, tax law, and trust administration. For most estates, it never becomes relevant. For the estates where it does, the absence of contingency planning turns a manageable legal question into a multi-year liquidity crisis.

The core planning principles are straightforward:

No single point of failure. Every primary beneficiary designation should have a named contingent. Every trustee who is also a beneficiary should have an independent successor.

Automatic triggers, not court-dependent ones. Slayer contingency clauses that require a final criminal conviction before redirecting assets provide almost no protection. The clause should activate when a proceeding is initiated.

Independent fiduciaries for high-stakes structures. ILITs designed to fund estate tax obligations cannot afford to be frozen. An independent corporate trustee is not optional for that structure.

Explicit digital asset provisions. Smart contract inheritance tools are not a substitute for court-enforceable trust language. Include digital assets by category in every trust document and beneficiary designation form.

Multi-state choice-of-law provisions. Do not let a court decide which state's slayer rule governs your vacation home. Specify it in the trust document.

The ACTEC guidance on professional obligations notes that estate planning attorneys have specific duties when a client's estate plan may be implicated by a slayer rule claim, including careful attention to confidentiality and the representation of competing beneficiaries. If your estate plan has not been reviewed with these contingencies in mind, that conversation is worth having with your attorney before it becomes necessary.

References

• Uniform Law Commission -- "Uniform Probate Code, Section 2-803: Effect of Homicide on Intestate Succession, Wills, Trusts, Joint Assets, Life Insurance, and Beneficiary Designations" (2010)
• California Legislature -- "California Probate Code Sections 250-258 (Prohibition of Slayer from Benefiting)" (1990)
• New York State Legislature -- "New York Estates, Powers and Trusts Law (EPTL) Section 4-1.6: Disqualification of Joint Tenant or Tenant by the Entirety"
• American Bar Association -- "Real Property, Trust and Estate Law Journal: The Slayer Rule in the Age of the Uniform Probate Code"
• U.S. Supreme Court -- "New York Mutual Life Insurance Co. v. Armstrong, 117 U.S.

591 (1886)"

• New York Court of Appeals -- "Riggs v. Palmer, 115 N.Y. 506 (1889)"
• Internal Revenue Service -- "IRC Section 2035 and Estate Tax Inclusion: Life Insurance and the Three-Year Rule"
• American College of Trust and Estate Counsel (ACTEC) -- "ACTEC Commentaries on the Model Rules of Professional Conduct" (2016)