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

In Colorado, first-degree murder under C.R.S. 18-3-102 carries a mandatory life sentence. Parole eligibility depends on when the offense occurred: 10 years for pre-1977 crimes, 20 years for 1977-1985, and 40 years for offenses between July 1, 1985 and June 30, 1990. For offenses committed on or after July 1, 1990 — which covers essentially every first-degree murder committed today — the sentence is mandatory life WITHOUT the possibility of parole (C.R.S. § 17-22.5-104), with no parole-eligibility date at all.

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

In Colorado, a life sentence does not have a single, fixed meaning. The number of years a person must serve before becoming eligible for parole depends almost entirely on when the offense was committed. Someone convicted of a crime before July 1977 could be eligible for parole after just 10 years, while someone convicted between July 1985 and June 1990 must serve a minimum of 40 years. Anyone convicted of an offense committed on or after July 1, 1990 — which covers every murder committed today — instead receives mandatory life WITHOUT the possibility of parole, with no eligibility date at all.

This tiered system — three parole-eligible windows followed by a mandatory-LWOP cutoff in 1990 — makes Colorado unusual among states. Combined with the 2020 abolition of the death penalty and ongoing legislative reform efforts, Colorado's approach to life sentencing has undergone significant transformation in recent decades.

Colorado Life Sentence Statutes

Colorado's criminal code defines murder and its penalties across several key statutes.

First-Degree Murder (C.R.S. § 18-3-102): A person commits first-degree murder if they, after deliberation and with intent to cause the death of another person, cause the death of that person or another. First-degree murder also includes felony murder — a death that occurs during the commission of certain enumerated felonies. First-degree murder is a Class 1 felony carrying a mandatory sentence of life imprisonment.

Second-Degree Murder (C.R.S. § 18-3-103): A person commits second-degree murder if they knowingly cause the death of another person. This is a Class 2 felony. The presumptive sentencing range is 16 to 48 years, though aggravating factors can push the sentence higher.

Sentencing for First-Degree Murder (C.R.S. § 18-1.3-1201): This statute governs the sentencing framework for Class 1 felonies; the death penalty's abolition in 2020 made life imprisonment without parole the maximum (not just an alternative) sentence for first-degree murder. But LWOP itself is far older than that: under C.R.S. § 17-22.5-104, any Class 1 felony (including first-degree murder) committed on or after July 1, 1990 has carried mandatory life imprisonment without the possibility of parole, regardless of the death penalty's later abolition.

Manslaughter (C.R.S. § 18-3-104): A Class 4 felony carrying 2 to 6 years for the basic offense, with an aggravated range of up to 16 years for heat-of-passion manslaughter under certain circumstances.

Parole Eligibility: The Variable Timeline

This is the most critical and unusual feature of Colorado's life sentencing system. The Colorado General Assembly has changed parole eligibility rules multiple times, and the law that was in effect at the time of the offense controls whether and when a life-sentenced person can seek parole.

Before July 1, 1977: 10 Years

Individuals convicted of first-degree murder for offenses committed before July 1, 1977, become eligible for parole consideration after serving 10 years. This reflects the sentencing philosophy of the era, which generally favored rehabilitation and indeterminate sentences.

Very few people remain incarcerated under this framework, given the nearly 50 years that have passed. However, those who were denied parole repeatedly — or who committed their offenses as young adults — may still be affected.

July 1, 1977 to June 30, 1985: 20 Years

For offenses committed during this eight-year window, the minimum time before parole eligibility is 20 years. The Colorado legislature doubled the minimum during this period as part of a nationwide trend toward tougher sentencing.

July 1, 1985 to June 30, 1990: 40 Years

For offenses committed during this five-year window, a life sentence carries a minimum of 40 years before parole eligibility — among the longest parole minimums in the country at the time. At 40 years, many life-sentenced individuals from this cohort will be elderly before they are even eligible for a hearing — and eligibility does not guarantee release. The Colorado Board of Parole evaluates each case individually, considering the nature of the offense, institutional conduct, risk assessment, victim impact, and release planning.

On or After July 1, 1990: Mandatory Life Without Parole

For offenses committed on or after July 1, 1990 — which covers every first-degree murder committed today — Colorado law (C.R.S. § 17-22.5-104) makes life imprisonment WITHOUT the possibility of parole the mandatory sentence, with no numeric years-to-parole figure at all. The only paths to release are executive clemency from the governor or a successful court appeal resulting in resentencing. (A narrow exception preserves the 40-year parole-eligible option for certain juvenile offenders direct-filed into adult court for offenses on or after July 1, 2006.)

Life Without Parole (LWOP)

Life without the possibility of parole (LWOP) has been the mandatory sentence for a first-degree murder committed on or after July 1, 1990, under C.R.S. § 17-22.5-104 — three decades before Colorado abolished the death penalty in 2020. The 2020 abolition (SB 20-100) simply removed death as an alternative, making LWOP the sole maximum sentence rather than one of two.

For LWOP sentences, there is no parole eligibility date. The only paths to release are executive clemency from the governor or a successful court appeal that results in resentencing.

Abolition of the Death Penalty

Colorado abolished the death penalty on March 23, 2020, when Governor Jared Polis signed Senate Bill 20-100 into law. The bill passed the state Senate 19-13 and the House 38-27, making Colorado the 22nd state to abolish capital punishment.

The law applied prospectively — eliminating the death penalty for offenses committed on or after July 1, 2020. However, Governor Polis took the additional step of commuting the sentences of all three men on Colorado's death row to life without parole.

The Three Commuted Death Row Inmates

The three individuals whose sentences were commuted were all convicted of the 1993 murder of Lorraine Martelli, the owner of a Denver pizza restaurant:

• Robert Ray — sentenced to death in 2009
• Sir Mario Owens — sentenced to death in 2008
• Nathan Dunlap — sentenced to death in 1996 for the 1993 Chuck E. Cheese massacre in Aurora, in which he killed four employees. Dunlap's case had been particularly contentious; former Governor John Hickenlooper issued a temporary reprieve in 2013 rather than allow the execution to proceed.

Governor Polis stated that the commutations were necessary to ensure equal justice, noting that the death penalty was applied inconsistently and disproportionately in Colorado.

Colorado's Last Execution

Colorado last carried out an execution on October 13, 1997, when Gary Lee Davis was put to death by lethal injection for the 1986 kidnapping, sexual assault, and murder of Virginia May. Davis was the first person executed in Colorado since 1967.

In total, Colorado executed only one person during the modern death penalty era (post-1976).

Notable Life Sentence Cases

James Holmes — Aurora Theater Shooting (2015)

On July 20, 2012, James Holmes opened fire inside a Century 16 movie theater in Aurora during a midnight screening of The Dark Knight Rises. He killed 12 people and injured 70 others in one of the deadliest mass shootings in American history.

Holmes was convicted of 24 counts of first-degree murder (two counts per victim) and 140 counts of attempted murder. The prosecution sought the death penalty. During the sentencing phase, the jury deadlocked — unable to reach a unanimous verdict for death — and the judge imposed the mandatory alternative: life without the possibility of parole, plus 3,318 years for the attempted murder and other charges.

Holmes is incarcerated in an undisclosed out-of-state facility for security reasons.

Anderson Lee Aldrich — Club Q Shooting (2023)

On November 19, 2022, Anderson Lee Aldrich opened fire inside Club Q, an LGBTQ+ nightclub in Colorado Springs, killing five people and injuring 17. Patrons subdued Aldrich before police arrived.

In June 2023, Aldrich pleaded guilty to five counts of first-degree murder and 46 counts of attempted first-degree murder. The court imposed 55 consecutive life sentences — five life sentences for the murders plus 50 for the attempted murders. Aldrich will never be eligible for parole.

The case was prosecuted in state court. Federal hate crime charges were also filed but deferred following the state conviction and sentencing.

Christopher Watts — Family Murder (2018)

In August 2018, Christopher Watts strangled his pregnant wife Shanann and their two daughters, Bella (4) and Celeste (3), at their home in Frederick, Colorado. He confessed after initially claiming they had disappeared.

Watts pleaded guilty to multiple counts of first-degree murder and was sentenced to life without the possibility of parole. The plea deal took the death penalty off the table at the request of the victims' family, who did not want a prolonged trial.

The case generated enormous public interest and was the subject of multiple documentaries and a Netflix film.

Recent Legislative Changes

Emerging Adult Sentencing Guidelines (2021)

In 2021, Colorado enacted new sentencing guidelines recognizing the developmental differences of emerging adults aged 18 to 25. Brain development research has consistently shown that the prefrontal cortex — responsible for impulse control, judgment, and long-term planning — does not fully mature until the mid-20s.

Under the new guidelines, courts must consider the offender's age, maturity level, and capacity for rehabilitation when imposing sentences on individuals in this age group. While this does not prevent life sentences for emerging adults, it requires judges to weigh age-related factors that may result in more nuanced sentencing.

SB 26-115: Sentencing Review for Long-Serving Individuals (Enacted 2026)

Senate Bill 26-115 was signed into law by Governor Polis on June 3, 2026 and took effect August 12, 2026. It creates a formal sentencing review process for individuals who have served extended terms of imprisonment: a person may petition the court if they are 60 years of age or older at the time of filing and have served at least 20 calendar years incarcerated. (The bill as introduced also allowed petitions from people who were under 21 at the time of the offense, but that pathway was removed by Senate amendment before final passage.) Sex offenses, human trafficking, offenses resulting in LWOP, crimes against a victim under 12, and offenses against first responders are excluded from eligibility, and eligible individuals have three years from the effective date to file a petition.

The bill is part of a growing national second look movement. As of September 2025, 25 states plus D.C. and the federal government have enacted some form of second look judicial sentence review policy, according to the Sentencing Project.

SB 26-115 is now in effect. Its enactment represents a significant shift in how Colorado approaches long-term incarceration.

Governor Polis Skips Year-End Clemency (2025)

In a notable departure from recent practice, Governor Jared Polis did not issue any year-end clemency grants in December 2025 — the first time he skipped the annual clemency cycle during his tenure. Previous years had seen Polis grant commutations and pardons during the holiday period, consistent with a tradition shared by many governors.

The decision drew criticism from criminal justice reform advocates who had expected action on several pending clemency petitions.

Juvenile Life Sentences in Colorado

Colorado has effectively eliminated juvenile life without parole (JLWOP). The state's reforms in this area have come through a combination of legislative action and the broader death penalty abolition movement.

The U.S. Supreme Court's ruling in Miller v. Alabama (2012) held that mandatory life without parole for juveniles violates the Eighth Amendment. Colorado went further, aligning its sentencing framework to ensure that juveniles convicted of the most serious offenses receive sentences that account for their youth and capacity for change.

Under current Colorado law, juveniles convicted in adult court are not subject to mandatory LWOP. Courts must conduct individualized sentencing hearings that consider the offender's age, maturity, family circumstances, and potential for rehabilitation.

Colorado's 2021 emerging adult sentencing guidelines extended similar considerations to young adults up to age 25, further reinforcing the state's recognition that youthful offenders warrant different sentencing considerations.

Historical Context

Colorado's approach to life sentencing has evolved considerably over the past century.

Early parole framework: Before the tough-on-crime era, Colorado's sentencing system was indeterminate, with parole boards exercising broad discretion. The 10-year parole minimum for pre-1977 offenses reflects this philosophy.

Tougher sentencing (1977–1985): Like many states during this period, Colorado doubled its parole minimum to 20 years in response to rising crime rates and public demand for longer sentences.

The 40-year minimum (1985): Colorado's decision to set a 40-year minimum for post-1985 life sentences placed it among the strictest states for parole eligibility. This effectively ensured that most life-sentenced individuals would spend the majority of their lives in prison.

Death penalty era: Colorado reinstated the death penalty in 1975 but used it sparingly. Only one execution was carried out during the modern era. Multiple governors expressed reservations about capital punishment, with Hickenlooper's 2013 reprieve of Nathan Dunlap signaling the political shift that ultimately led to abolition.

Abolition and reform (2020–present): The death penalty's elimination and subsequent legislative activity — including emerging adult guidelines and the now-enacted SB 26-115 (2026) — suggest Colorado is moving toward a more nuanced sentencing framework, though mandatory LWOP for any first-degree murder committed on or after July 1, 1990 remains firmly in place; the 40-year parole minimum now applies only to the narrowing pool of 1985-1990 offenses (plus certain direct-filed juvenile cases).

Colorado 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?