Filicide is the killing of a child by a parent or parental figure, and no U.S. jurisdiction treats it as a standalone crime. Prosecutors charge these cases under the same homicide statutes used for any other killing — first-degree murder, second-degree murder, or manslaughter — with the parent-child relationship and the victim’s age usually working as aggravating factors at sentencing. The result is that filicide convictions sit among the most severely punished homicides in the system, even though the word itself appears nowhere in the criminal code.
Who the Term Covers
Filicide applies when the killer stood in a parental role: a biological parent, an adoptive parent, or a stepparent. The victim is a minor. The age of majority is 18 in most states, with a few setting it at 19 or 21. The defining element is the caregiving relationship, not the method of killing or the setting. Research has consistently found that roughly 500 children under five are killed by a parent each year in the United States, with mothers and fathers committing filicide at comparable rates.1National Center for Biotechnology Information. An Overview of Filicide
Filicide, Infanticide, and Neonaticide
Three terms get used interchangeably in news coverage, but they describe different things. Filicide is the broadest and covers any killing of a child by a parent. Infanticide refers specifically to the killing of an infant under 12 months old. Neonaticide is narrower still, covering a killing within the first 24 hours of life.
The distinction has legal weight in some countries. Under the United Kingdom’s Infanticide Act 1938, when a mother kills her child under 12 months and her mental balance was disturbed by the effects of giving birth, the offense is treated as manslaughter rather than murder.2Legislation.gov.uk. Infanticide Act 1938 Canada and Australia have similar statutes. The United States does not. No state has enacted an equivalent law, so American prosecutors handle every age range through standard homicide charges, with mental health arguments raised as defenses at trial rather than built into the offense.
Neonaticide tends to look different from other filicide. The perpetrator is nearly always the mother. About three-quarters of cases involve a concealed pregnancy. The mothers are usually young, unmarried, without prenatal care, and, unlike parents who kill older children, usually not mentally ill.3National Center for Biotechnology Information. Neonaticides in the United States 2008-2017 That absence of mental illness makes insanity defenses much harder to sustain in these prosecutions.
Why Filicide Happens: Resnick’s Five Categories
Psychiatrist Phillip Resnick, whose work shapes how courts and clinicians think about these cases, grouped filicides into five categories by motive. The categories are not legal doctrines, but they influence which charges fit and which defenses have a chance.
- Altruistic filicide. The parent kills the child to end what they perceive as the child’s suffering, or as part of a planned suicide where they cannot bear to leave the child behind. Severe depression distorts reasoning in these cases.
- Acutely psychotic filicide. Hallucinations, delusions, or severe mental illness drive the killing, and investigators find no rational motive. This category is the most likely to support an insanity defense.
- Unwanted child filicide. The parent kills a child they no longer want. Many neonaticide cases fit here.
- Fatal maltreatment. A child dies from abuse where the parent intended harm but not necessarily death. This is the most common motive behind child homicide in the United States and typically produces manslaughter or second-degree murder charges rather than first-degree murder.
- Spouse revenge. The parent kills the child to inflict emotional devastation on the other parent, most often tied to custody disputes or infidelity.
How Filicide Is Charged
Because filicide is a description rather than a statute, the specific charge depends on the parent’s mental state and the circumstances of the death. The same act can produce very different charges depending on whether the killing was planned, impulsive, or the unintended endpoint of abuse.
First-Degree Murder
Under federal law, first-degree murder requires a premeditated, deliberate killing. It also includes any killing committed during child abuse, or as part of a pattern of assault or torture against a child. That second provision is significant in filicide cases: a parent who kills a child during an episode of ongoing abuse faces a first-degree murder charge even without evidence of a specific plan to kill. Federal law defines “child” here as someone under 18 who is either in the perpetrator’s care or at least six years younger than the perpetrator.4Office of the Law Revision Counsel. 18 USC 1111 – Murder First-degree murder carries life imprisonment or death.
Second-Degree Murder
Any murder that does not meet the first-degree criteria falls into second-degree murder. The killing must still be unlawful and committed with malice, but without premeditation or the specific aggravating circumstances listed in the first-degree statute.4Office of the Law Revision Counsel. 18 USC 1111 – Murder A parent who kills a child in a sudden rage, without prior planning, may face this charge. The federal penalty is any term of years up to life.
Manslaughter
When a child’s death results from abuse or neglect but the parent did not intend to kill, manslaughter charges are common. Voluntary manslaughter covers killings committed in the heat of passion. Involuntary manslaughter covers deaths caused by reckless or criminally negligent conduct. Fatal maltreatment cases, where a beating goes too far, most often result in involuntary manslaughter or second-degree murder charges. Federal penalties reach up to 15 years for voluntary manslaughter and 8 years for involuntary manslaughter.5Office of the Law Revision Counsel. 18 USC 1112 – Manslaughter
Sentencing Enhancements
Beyond the base charge, both federal and state systems treat a child’s vulnerability as a reason to increase punishment. Federal death penalty law lists the victim’s youth as a specific aggravating factor that can make a defendant eligible for execution.6Office of the Law Revision Counsel. 18 USC 3592 – Mitigating and Aggravating Factors to Be Considered in Determining Whether a Sentence of Death Is Justified Most states have parallel provisions treating the victim’s age as an aggravating circumstance at sentencing. A parent convicted of killing a young child faces the realistic possibility of the maximum penalty available in that jurisdiction.
Mental Health Defenses
Filicide cases raise mental health defenses more often than almost any other category of homicide. Severe depression, psychosis, and delusional thinking drive many of these killings. Succeeding with the defense, though, is harder than most people assume.
Insanity
Under federal law, the insanity defense requires proof that the defendant, because of a severe mental disease or defect, could not appreciate either the nature of their actions or that those actions were wrong. The defendant bears the burden of proving insanity by clear and convincing evidence, a higher standard than the preponderance test used in civil cases.7Office of the Law Revision Counsel. 18 USC 17 – Insanity Defense Most states apply a similar standard, though the specific legal test varies.
The altruistic and acutely psychotic categories are the most likely to succeed with insanity. In one study of 20 women who raised postpartum depression or psychosis as a defense, half were found not guilty by reason of insanity, a quarter received heavy sentences, and a quarter received light sentences.8National Center for Biotechnology Information. Filicide in the United States Those numbers reflect a real tension: even a parent experiencing psychotic depression often plans the killing methodically, which makes it difficult to argue they did not understand what they were doing.
Diminished Capacity
A diminished capacity argument does not aim for acquittal. It targets the degree of the charge. The claim is that mental illness prevented the defendant from forming the specific intent required for the highest charge. A parent charged with first-degree murder might argue that severe depression or psychosis made premeditation impossible, pushing the conviction down to second-degree murder or manslaughter.
Postpartum Psychosis
Postpartum psychosis affects a small number of new mothers and can involve hallucinations, delusions, and severely disordered thinking. In filicide cases it typically appears as the factual basis for an insanity defense rather than as a defense in its own right. American law does not recognize postpartum psychosis as a separate legal category the way the UK’s Infanticide Act does, so a mother experiencing it must fit her condition into the same insanity framework used for any other mental illness and carry the same burden of proof.
Safe Haven Laws
Every state has enacted a safe haven law allowing a parent to surrender an unharmed newborn at a designated location, such as a hospital or fire station, without facing criminal prosecution for abandonment. These laws exist specifically to prevent neonaticide by giving parents in crisis a legal alternative. The maximum age of the infant varies widely: about a third of states set the limit at three days, while others allow surrender up to 30 days, 60 days, or even a year. Parents who use safe haven protections properly avoid both criminal charges and civil liability.
Civil and Family Law Consequences
Criminal prosecution is not the only legal consequence. Surviving family members may bring a wrongful death lawsuit against the perpetrator, seeking compensation for their own losses, including emotional suffering and lost financial support. The criminal conviction does not automatically resolve the civil case. The civil claim requires a separate proceeding and uses a lower burden of proof.
A parent convicted of killing a child also faces termination of parental rights over any surviving children. Procedures vary by state, but a felony conviction involving violence against a child is among the strongest grounds for termination everywhere. Federal law under the Adoption and Safe Families Act requires states to file termination petitions in cases involving certain aggravated circumstances, including the murder of a sibling.