How Long Is a Life Sentence in Idaho? (2026 Guide)

Under Idaho Code § 18-4004, a life sentence for first-degree murder carries a minimum of at least 10 years before parole eligibility. If a statutory aggravating circumstance is proven but a death sentence is found unjust, the court must impose a fixed life sentence with no possibility of parole. For second-degree murder, the range is 10 years to life.

This article was last reviewed and updated on March 17, 2026. All statutes, case law, and sentencing data have been verified against current Idaho government sources.

In Idaho, a life sentence for first-degree murder carries a minimum of 10 years in prison before the person becomes eligible for parole. That is one of the shortest mandatory minimums for first-degree murder in the country. However, the practical reality in Idaho is far more severe than that number suggests.

When a jury (or the court, if a jury is waived) finds a statutory aggravating circumstance but concludes the death penalty would be unjust, Idaho law requires a fixed life sentence with no possibility of parole. Idaho also retains the death penalty, and the state has taken aggressive steps in recent years to ensure it can carry out executions, including making the firing squad the primary execution method as of July 1, 2026.

The state's criminal justice landscape has been shaped by several nationally prominent cases in recent years, including the Chad Daybell triple murder trial and the Bryan Kohberger case, which ended in a 2025 guilty plea and a sentence of life without parole for the University of Idaho student killings.

For a broader look at how all 50 states handle life sentences, see our complete state-by-state guide to life sentences.

Idaho Life Sentence Statutes

Idaho's criminal code defines murder and its penalties under Title 18 of the Idaho Code.

First-Degree Murder (Idaho Code § 18-4003): First-degree murder in Idaho includes all murder that is willful, deliberate, and premeditated. It also covers murders committed during the perpetration of arson, rape, robbery, burglary, kidnapping, mayhem, or an act of terrorism. Under Idaho Code § 18-4004, first-degree murder is punishable by death or life imprisonment. If a statutory aggravating circumstance is found but death is found unjust, the court must impose fixed life; otherwise the court imposes life with a minimum period of confinement of not less than 10 years.

Murder (Idaho Code § 18-4001): Idaho defines murder as the unlawful killing of a human being with malice aforethought, including express or implied malice. This broad definition encompasses both first- and second-degree murder.

Second-Degree Murder (Idaho Code § 18-4003): All murder that is not first-degree is classified as second-degree murder. Under Idaho Code § 18-4004, second-degree murder carries a sentence of not less than 10 years and up to life in prison. Parole eligibility depends on the fixed or indeterminate nature of the sentence imposed by the court.

Voluntary Manslaughter (Idaho Code § 18-4007): Voluntary manslaughter carries a maximum sentence of 15 years in prison. Our guide to Idaho manslaughter laws covers the involuntary and vehicular forms and how each is punished.

Aggravating Factors for Capital Sentencing

Under Idaho Code § 19-2515, the prosecution must prove at least one statutory aggravating factor beyond a reasonable doubt to seek the death penalty. Idaho's aggravating factors include:

• The defendant was previously convicted of another murder
• At the time of the murder, the defendant also committed another murder
• The defendant knowingly created a great risk of death to many persons
• The murder was committed for remuneration or the promise of remuneration, or the defendant hired another to commit it
• The murder was especially heinous, atrocious, or cruel, manifesting exceptional depravity
• By the murder, or the circumstances surrounding it, the defendant exhibited utter disregard for human life
• The murder was committed during arson, rape, robbery, burglary, kidnapping, or mayhem, and the defendant killed, intended a killing, or acted with reckless indifference to human life
• The murder was committed during specified sex offenses against a minor, and the defendant killed, intended a killing, or acted with reckless indifference to human life
• The defendant has shown a propensity to commit murder that will probably constitute a continuing threat to society
• The victim was a former or present peace officer, executive officer, officer of the court, judicial officer, or prosecuting attorney, killed because of official duty or official status
• The victim was a witness or potential witness in a criminal or civil legal proceeding, killed because of that proceeding

Parole Eligibility

Idaho's parole system operates under an indeterminate sentencing structure, meaning judges impose sentences with a minimum (fixed portion) and a maximum. Parole eligibility begins after the fixed portion of the sentence is served.

First-degree murder with indeterminate life: If the judge imposes a life sentence with a minimum of 10 years, the defendant becomes eligible for parole after serving those 10 years. This does not guarantee release. It means the Idaho Commission of Pardons and Parole will conduct a hearing to determine whether the person is suitable for release.

Fixed life sentence: If the court imposes a fixed life sentence, there is no parole eligibility. The person will die in prison. Under § 18-4004, fixed life is required when a statutory aggravating circumstance is proven but the death penalty is found unjust.

Second-degree murder: Parole eligibility depends on the minimum sentence set by the judge. With a minimum of 10 years and a maximum of life, the person can seek parole after 10 years.

Idaho Commission of Pardons and Parole

The Idaho Commission of Pardons and Parole is responsible for evaluating inmates for early release. The commission considers the nature of the offense, the inmate's institutional conduct and rehabilitation efforts, victim impact statements, risk assessment instruments, and the proposed release plan.

For life-sentenced inmates, the commission takes a conservative approach. Parole from a life sentence in Idaho is uncommon, particularly for first-degree murder convictions. Many inmates serve decades beyond their initial eligibility date before receiving a favorable parole decision, and many are never paroled at all.

If parole is denied, the commission typically schedules a new hearing within one to five years. Inmates may also waive their parole hearings if they choose.

Capital Murder and the Death Penalty

Idaho is one of 27 states that retain the death penalty, and the state has taken more aggressive steps than most to ensure its ability to carry out executions.

The Move to Firing Squad: HB 37 (2025)

In 2025, Idaho Governor Brad Little signed House Bill 37, which made the firing squad the primary method of execution in Idaho. The law took effect on July 1, 2026.

The shift was driven by practical necessity. Idaho struggled for years to obtain the drugs required for lethal injection due to pharmaceutical company restrictions on selling their products for use in executions. The difficulty came to a head in 2024 when the state attempted to execute Thomas Creech, the oldest inmate on Idaho's death row, by lethal injection. The medical team failed to establish an IV line after multiple attempts, and the execution was called off.

That failed execution attempt became the catalyst for HB 37. Legislators concluded that lethal injection was no longer a reliable method and that the firing squad offered a more certain alternative. Idaho joined Utah as one of the few states that authorize the firing squad as an execution method, but Idaho went further by making it the default rather than a backup option.

Lethal injection remains available as a secondary method if the firing squad cannot be carried out.

Death Row and Current Status

As of early 2026, Idaho has eight inmates on death row housed at the Idaho Maximum Security Institution in Kuna.

Idaho has executed three people since the death penalty was reinstated following the U.S. Supreme Court's decision in Gregg v. Georgia (1976).

HB 380: Expanding Capital Offenses (2025)

Also in 2025, Idaho enacted House Bill 380, which expanded the death penalty to cover non-lethal sex crimes against children 12 years of age or under. This was a significant departure from the traditional scope of capital punishment, which in most states is limited to murder.

The constitutionality of HB 380 is uncertain. In Kennedy v. Louisiana (2008), the U.S. Supreme Court held that the Eighth Amendment prohibits the death penalty for crimes against individuals where the offense did not result in death. Idaho's law directly challenges that precedent, and legal challenges are expected.

Notable Idaho Life Sentence Cases

Bryan Kohberger: University of Idaho Murders (2022-2025)

Bryan Kohberger, a criminology graduate student at Washington State University, was charged with four counts of first-degree murder for the November 13, 2022, stabbing deaths of four University of Idaho students in Moscow, Idaho: Madison Mogen, Kaylee Goncalves, Xana Kernodle, and Ethan Chapin.

Kohberger pleaded guilty on July 2, 2025, to four counts of first-degree murder and one count of burglary under a deal that took the death penalty off the table. On July 23, 2025, a judge sentenced him to four consecutive fixed life terms without the possibility of parole, plus 10 years for the burglary count. Kohberger later filed post-conviction petitions seeking to withdraw his guilty plea; as of this writing those challenges remain pending, but his sentence of life without parole stands.

Chad Daybell: Death Sentence for Triple Murder (2024)

Chad Daybell was convicted in 2024 of murdering his first wife, Tammy Daybell, and two stepchildren, 7-year-old Joshua "JJ" Vallow and 16-year-old Tylee Ryan. The jury sentenced him to death on all three murder counts.

The case was intertwined with Daybell's apocalyptic religious beliefs and his relationship with Lori Vallow Daybell, who was separately convicted and sentenced to life without parole. The children's remains were found buried on Chad Daybell's property in Fremont County, Idaho.

Daybell's death sentence was one of the most high-profile capital verdicts in Idaho history. His case remains on direct appeal.

Thomas Creech: Oldest Death Row Inmate, Failed Execution (2024)

Thomas Creech, who has been on death row since 1981, was convicted of multiple murders spanning Idaho and other states. In February 2024, the state attempted to execute Creech by lethal injection. The medical team spent approximately an hour trying to establish an IV line in Creech's arms, legs, and feet before abandoning the attempt.

The failed execution drew national attention and became the primary impetus for Idaho's shift to the firing squad. Creech remains on death row, and the state may seek a new execution date now that the firing squad protocol is in effect.

Mark Lankford: Exoneration After 26 Years (2010)

Mark Lankford spent 26 years in prison for a double murder before his conviction was overturned in 2010. His case highlighted concerns about wrongful convictions in capital cases and the reliability of jailhouse informant testimony. Lankford's brother Bryan, who had confessed and testified against Mark, later recanted. Mark Lankford was acquitted at retrial.

Recent Legislative Changes

Idaho has not significantly modified its murder sentencing framework in recent years. The 10-year minimum for first-degree murder with parole eligibility has remained stable. The trend in Idaho has been toward expanding severe penalties rather than sentencing reform, as reflected by the two major 2025 bills.

Juvenile Life Sentences

Idaho has not explicitly banned juvenile life without parole (JLWOP) by statute. However, the U.S. Supreme Court's rulings in Miller v. Alabama (2012) and Montgomery v. Louisiana (2016) prohibit mandatory LWOP for juveniles and require individualized sentencing hearings.

Under Miller, a sentencing court must consider a juvenile offender's youth, immaturity, vulnerability to peer pressure, home environment, and capacity for rehabilitation before imposing a life sentence. Mandatory fixed life sentences for juveniles are unconstitutional.

The Supreme Court's decision in Jones v. Mississippi (2021) clarified that a sentencer is not required to make a specific finding of "permanent incorrigibility" before imposing JLWOP. Discretionary JLWOP remains constitutionally permissible as long as the court considers the defendant's youth.

Idaho law allows juveniles to be tried as adults for serious offenses, including murder. Under Idaho Code § 20-509, juveniles aged 14 and older charged with murder, attempted murder, robbery, rape, or assault with intent to commit these offenses may be automatically waived to adult court.

A juvenile convicted of first-degree murder in adult court could receive a fixed life sentence after an individualized hearing, though this outcome is rare. Idaho courts are required to give meaningful consideration to the juvenile's age and the possibility of rehabilitation.

Historical Context

Idaho's approach to life sentencing and capital punishment reflects the state's broader conservative criminal justice philosophy.

Early Death Penalty History

Idaho has authorized the death penalty since it became a territory in 1863. The state has used hanging, lethal injection, and soon the firing squad as execution methods. Idaho briefly lost its death penalty following the U.S. Supreme Court's decision in Furman v. Georgia (1972), which struck down capital punishment schemes nationwide. Idaho re-enacted its death penalty statutes after Furman, and its capital sentencing law was amended again after Gregg v. Georgia (1976).

The Indeterminate Sentencing System

Idaho uses an indeterminate sentencing system in which judges set both a minimum and maximum term. For life sentences, the minimum cannot be less than 10 years for first-degree murder. When no statutory aggravating circumstance is found, the court sets the minimum period of confinement, which can make parole possible after 10 years. When an aggravator is proven and death is found unjust, the court must impose fixed life, eliminating parole entirely.

This flexibility has been praised by prosecutors and judges who value the ability to tailor sentences to individual cases. It has also been criticized for creating sentencing disparities, where similar crimes receive very different punishments depending on the judge and the jurisdiction.

Low Execution Rate Despite Active Death Penalty

Despite maintaining the death penalty, Idaho has carried out very few executions. Only three executions have occurred since 1977. This low number is partly attributable to the small death row population and the extensive appellate process, but it is also a result of the practical difficulties Idaho has faced in carrying out lethal injection.

The shift to the firing squad represents Idaho's attempt to resolve this problem and create a more reliable execution method. Whether this change will lead to more frequent executions remains to be seen.

Connection to National Cases

Idaho's criminal justice system has been thrust into the national spotlight by the Daybell and Kohberger cases. These cases have brought unprecedented media attention to Idaho's courts, its death penalty procedures, and its sentencing laws. They have also influenced the legislative push to expand capital punishment, as lawmakers responded to public concern about violent crime with HB 37 and HB 380.

Idaho Life Sentence at a Glance

Related Pages

• How Long Is a Life Sentence? State-by-State Guide
• Murder Sentencing Guidelines for Every State
• What Is Capital Murder?

Frequently Asked Questions

How long is a life sentence in Idaho?

A life sentence for first-degree murder in Idaho carries a minimum of 10 years before parole eligibility if the judge imposes an indeterminate sentence. However, if a statutory aggravating circumstance is proven and the death penalty is found unjust, the court must impose a fixed life sentence with no parole eligibility, meaning the person will die in prison. The actual time served depends on the type of life sentence imposed.

Does Idaho have the death penalty?

Yes. Idaho has an active death penalty with eight inmates currently on death row. In 2025, Idaho enacted HB 37, which made the firing squad Idaho's primary execution method as of July 1, 2026. The state also expanded death-eligible offenses to include non-lethal sex crimes against children 12 years of age or under through HB 380.

What is the firing squad law in Idaho?

House Bill 37, signed in 2025 and effective July 1, 2026, made the firing squad Idaho's primary method of execution, replacing lethal injection as the default. The change was prompted by the failed lethal injection attempt of Thomas Creech in 2024, during which medical staff could not establish an IV line. Lethal injection remains available as a secondary method.

What happened in the Bryan Kohberger case?

Bryan Kohberger was charged with four counts of first-degree murder for the November 2022 stabbing deaths of four University of Idaho students in Moscow, Idaho. He pleaded guilty in July 2025 under a deal that took the death penalty off the table and was sentenced to four consecutive fixed life terms without the possibility of parole. He has since sought to withdraw his guilty plea, but as of this writing his life-without-parole sentence stands.

Can a juvenile receive life without parole in Idaho?

Idaho has not banned juvenile life without parole by statute. Mandatory JLWOP is unconstitutional under Miller v. Alabama (2012), but discretionary JLWOP remains legally available after an individualized hearing that considers the juvenile's youth and capacity for rehabilitation. Juveniles aged 14 and older can be tried as adults for murder.