Part 1. Homicide and Related Offenses

As used in this part 1, unless the context otherwise requires:
(1) “Homicide” means the killing of a person by another.
(2) “Person”, when referring to the victim of a homicide, means a human being who had been born and was alive at the time of the homicidal act.
(2.5) One in a “position of trust” includes, but is not limited to, any person who is a parent or acting in the place of a parent and charged with any of a parent's rights, duties, or responsibilities concerning a child, including a guardian or someone otherwise responsible for the general supervision of a child's welfare, or a person who is charged with any duty or responsibility for the health, education, welfare, or supervision of a child, including foster care, child care, family care, or institutional care, either independently or through another, no matter how brief, at the time of an unlawful act.
(3) The term “after deliberation” means not only intentionally but also that the decision to commit the act has been made after the exercise of reflection and judgment concerning the act. An act committed after deliberation is never one which has been committed in a hasty or impulsive manner.

(1) A person commits the crime of murder in the first degree if:
(a) After deliberation and with the intent to cause the death of a person other than himself, he causes the death of that person or of another person; or
(b) Repealed by Laws 2021, Ch. 58, § 1, eff. Sept. 15, 2021.
(c) By perjury or subornation of perjury he procures the conviction and execution of any innocent person; or
(d) Under circumstances evidencing an attitude of universal malice manifesting extreme indifference to the value of human life generally, he knowingly engages in conduct which creates a grave risk of death to a person, or persons, other than himself, and thereby causes the death of another; or
(e) He or she commits unlawful distribution, dispensation, or sale of a controlled substance to a person under the age of eighteen years on school grounds as provided in section 18-18-407(2), or 18-18-407(1)(g)(I) for offenses committed on or after October 1, 2013, and the death of such person is caused by the use of such controlled substance; or
(f) The person knowingly causes the death of a child who has not yet attained twelve years of age and the person committing the offense is one in a position of trust with respect to the victim.
(2) Repealed by Laws 2021, Ch. 58, § 1, eff. Sept. 15, 2021.
(3) Murder in the first degree is a class 1 felony.
(4) The statutory privilege between patient and physician and between husband and wife shall not be available for excluding or refusing testimony in any prosecution for the crime of murder in the first degree as described in paragraph (f) of subsection (1) of this section.

(1) A person commits the crime of murder in the second degree if:
(a) The person knowingly causes the death of a person; or
(b) Acting either alone or with one or more persons, he or she commits or attempts to commit felony arson, robbery, burglary, kidnapping, sexual assault as prohibited by section 18-3-402, sexual assault in the first or second degree as prohibited by section 18-3-402 or 18-3-403 as those sections existed prior to July 1, 2000, or a class 3 felony for sexual assault on a child as provided in section 18-3-405(2), or the felony crime of escape as provided in section 18-8-208, and, in the course of or in furtherance of the crime that he or she is committing or attempting to commit, or of immediate flight therefrom, the death of a person, other than one of the participants, is caused by any participant.
(1.5) It is an affirmative defense to a charge of violating subsection (1)(b) of this section that the defendant:
(a) Was not the only participant in the underlying crime; and
(b) Did not commit the homicidal act or in any way solicit, request, command, importune, cause, or aid the commission thereof; and
(c) Was not armed with a deadly weapon; and
(d) Did not engage himself or herself in or intend to engage in and had no reasonable ground to believe that any other participant intended to engage in conduct likely to result in death or serious bodily injury.
(2) Diminished responsibility due to self-induced intoxication is not a defense to murder in the second degree.
(2.5) Deleted by Laws 1996, H.B.96-1087, § 12, eff. July 1, 1996.
(3)(a) Except as otherwise provided in paragraph (b) of this subsection (3), murder in the second degree is a class 2 felony.
(b) Notwithstanding the provisions of paragraph (a) of this subsection (3), murder in the second degree is a class 3 felony where the act causing the death was performed upon a sudden heat of passion, caused by a serious and highly provoking act of the intended victim, affecting the defendant sufficiently to excite an irresistible passion in a reasonable person; but, if between the provocation and the killing there is an interval sufficient for the voice of reason and humanity to be heard, the killing is a class 2 felony.
(c) For purposes of determining sudden heat of passion pursuant to subsection (3)(b) of this section, a defendant's act does not constitute an act performed upon a sudden heat of passion if it results solely from the discovery of, knowledge about, or potential disclosure of the victim's actual or perceived gender, gender identity, gender expression, or sexual orientation, including but not limited to under circumstances in which the victim made an unwanted nonforcible romantic or sexual advance toward the defendant.
(4) A defendant convicted pursuant to subsection (1) of this section shall be sentenced by the court in accordance with the provisions of section 18-1.3-406.
(5) As used in this section, unless the context otherwise requires:
(a) “Gender identity” and “gender expression” have the same meaning as in section 18-1-901(3)(h.5).
(b) “Intimate relationship” has the same meaning as in section 18-6-800.3.
(c) “Sexual orientation” has the same meaning as in section 18-9-121(5)(b).

(1) A person commits the crime of manslaughter if:
(a) Such person recklessly causes the death of another person; or
(b) Such person intentionally causes or aids another person to commit suicide.
(c) Deleted by Laws 1996, H.B.96-1087, § 13, eff. July 1, 1996.
(2) Manslaughter is a class 4 felony.
(3) This section shall not apply to a person, including a proxy decision-maker as such person is described in section 15-18.5-103, C.R.S., who complies with any advance medical directive in accordance with the provisions of title 15, C.R.S., including a medical durable power of attorney, a living will, or a cardiopulmonary resuscitation (CPR) directive.
(4)(a) This section shall not apply to a medical caregiver with prescriptive authority or authority to administer medication who prescribes or administers medication for palliative care to a terminally ill patient with the consent of the terminally ill patient or his or her agent.
(b) For purposes of this subsection (4):
(I) “Agent” means a person appointed to represent the interests of the terminally ill patient by a medical power of attorney, power of attorney, health care proxy, or any other similar statutory or regular procedure used for designation of such person.
(II) “Medical caregiver” means a physician, registered nurse, nurse practitioner, physician assistant, or anesthesiologist assistant licensed by this state.
(III) “Palliative care” means medical care and treatment provided by a licensed medical caregiver to a patient with an advanced chronic or terminal illness whose condition may not be responsive to curative treatment and who is, therefore, receiving treatment that relieves pain and suffering and supports the best possible quality of his or her life.
(c) Paragraph (a) of this subsection (4) shall not be interpreted to permit a medical caregiver to assist in the suicide of the patient.

Any person who causes the death of another person by conduct amounting to criminal negligence commits criminally negligent homicide which is a class 5 felony.

(1)(a) If a person operates or drives a motor vehicle in a reckless manner, and such conduct is the proximate cause of the death of another, such person commits vehicular homicide.
(b)(I) If a person operates or drives a motor vehicle while under the influence of alcohol or one or more drugs, or a combination of both alcohol and one or more drugs, and such conduct is the proximate cause of the death of another, such person commits vehicular homicide. This is a strict liability crime.
<Text of (1)(b)(I.5) effective March 1, 2022>
(I.5) If a person operates or drives a motor vehicle while the person's ability is impaired by alcohol or one or more drugs, or a combination of both alcohol and one or more drugs, and such conduct is the proximate cause of the death of another, the person commits the crime of vehicular homicide.
(II) For the purposes of this subsection (1), one or more drugs means any drug, as defined in section 27-80-203(13), C.R.S., any controlled substance, as defined in section 18-18-102(5), and any inhaled glue, aerosol, or other toxic vapor or vapors, as defined in section 18-18-412.
(III) The fact that any person charged with a violation of this subsection (1) is or has been entitled to use one or more drugs under the laws of this state shall not constitute a defense against any charge of violating this subsection (1).
(IV) “Driving under the influence” means driving a vehicle when a person has consumed alcohol or one or more drugs, or a combination of alcohol and one or more drugs, which alcohol alone, or one or more drugs alone, or alcohol combined with one or more drugs affect such person to a degree that such person is substantially incapable, either mentally or physically, or both mentally and physically, of exercising clear judgment, sufficient physical control, or due care in the safe operation of a vehicle.
<Text of (1)(b)(V) effective March 1, 2022>
(V) “Driving while ability impaired” means driving a motor vehicle or vehicle when a person has consumed alcohol or one or more drugs, or a combination of both alcohol and one or more drugs, that affects the person to the slightest degree so that the person is less able than the person ordinarily would have been, either mentally or physically, or both mentally and physically, to exercise clear judgment, sufficient physical control, or due care in the safe operation of a motor vehicle or vehicle.
<Text of (1)(c) effective until March 1, 2022>
(c) Vehicular homicide, in violation of paragraph (a) of this subsection (1), is a class 4 felony. Vehicular homicide, in violation of paragraph (b) of this subsection (1), is a class 3 felony.
<Text of (1)(c) effective March 1, 2022>
(c) Vehicular homicide, in violation of subsection (1)(b)(I.5) of this section, is a class 4 felony. Vehicular homicide, in violation of subsection (1)(a) of this section, is a class 4 felony. Vehicular homicide, in violation of subsection (1)(b)(I) of this section, is a class 3 felony.
(2) In any prosecution for a violation of subsection (1) of this section, the amount of alcohol in the defendant's blood or breath at the time of the commission of the alleged offense, or within a reasonable time thereafter, as shown by analysis of the defendant's blood or breath, gives rise to the following:
(a) If there was at such time 0.05 or less grams of alcohol per one hundred milliliters of blood, or if there was at such time 0.05 or less grams of alcohol per two hundred ten liters of breath, it shall be presumed that the defendant was not under the influence of alcohol.
(b) If there was at such time in excess of 0.05 but less than 0.08 grams of alcohol per one hundred milliliters of blood, or if there was at such time in excess of 0.05 but less than 0.08 grams of alcohol per two hundred ten liters of breath, such fact may be considered with other competent evidence in determining whether or not the defendant was under the influence of alcohol.
(c) If there was at such time 0.08 or more grams of alcohol per one hundred milliliters of blood, or if there was at such time 0.08 or more grams of alcohol per two hundred ten liters of breath, such fact gives rise to the permissible inference that the defendant was under the influence of alcohol.
(d) If at such time the driver's blood contained five nanograms or more of delta 9-tetrahydrocannabinol per milliliter in whole blood, as shown by analysis of the defendant's blood, such fact gives rise to a permissible inference that the defendant was under the influence of one or more drugs.
(3) The limitations of subsection (2) of this section shall not be construed as limiting the introduction, reception, or consideration of any other competent evidence bearing upon the question of whether or not the defendant was under the influence of alcohol.
(4)(a) If a law enforcement officer has probable cause to believe that any person was driving a motor vehicle in violation of paragraph (b) of subsection (1) of this section, the person, upon the request of the law enforcement officer, shall take, and complete, and cooperate in the completing of any test or tests of the person's blood, breath, saliva, or urine for the purpose of determining the alcoholic or drug content within his or her system. The type of test or tests shall be determined by the law enforcement officer requiring the test or tests. If the person refuses to take, or to complete, or to cooperate in the completing of any test or tests, the test or tests may be performed at the direction of a law enforcement officer having probable cause, without the person's authorization or consent. If any person refuses to take or complete, or cooperate in the taking or completing of any test or tests required by this paragraph (a), the person shall be subject to license revocation pursuant to the provisions of section 42-2-126(3), C.R.S. When the test or tests show that the amount of alcohol in a person's blood was in violation of the limits provided for in section 42-2-126(3)(a), (3)(b), (3)(d), or (3)(e), C.R.S., the person shall be subject to license revocation pursuant to the provisions of section 42-2-126, C.R.S.
(b) Any person who is required to submit to testing shall cooperate with the person authorized to obtain specimens of his blood, breath, saliva, or urine, including the signing of any release or consent forms required by any person, hospital, clinic, or association authorized to obtain such specimens. If such person does not cooperate with the person, hospital, clinic, or association authorized to obtain such specimens, including the signing of any release or consent forms, such noncooperation shall be considered a refusal to submit to testing.
(c) The tests shall be administered at the direction of a law enforcement officer having probable cause to believe that the person committed a violation of subparagraph (I) of paragraph (b) of subsection (1) of this section and in accordance with rules and regulations prescribed by the state board of health concerning the health of the person being tested and the accuracy of such testing. Strict compliance with such rules and regulations shall not be a prerequisite to the admissibility of test results at trial unless the court finds that the extent of noncompliance with a board of health rule has so impaired the validity and reliability of the testing method and the test results as to render the evidence inadmissible. In all other circumstances, failure to strictly comply with such rules and regulations shall only be considered in the weight to be given to the test results and not to the admissibility of such test results. It shall not be a prerequisite to the admissibility of test results at trial that the prosecution present testimony concerning the composition of any kit used to obtain blood, urine, saliva, or breath specimens. A sufficient evidentiary foundation concerning the compliance of such kits with the rules and regulations of the department of public health and environment shall be established by the introduction of a copy of the manufacturer's or supplier's certificate of compliance with such rules and regulations if such certificate specifies the contents, sterility, chemical makeup, and amounts of chemicals contained in such kit.
(d) No person except a physician, a registered nurse, an emergency medical service provider certified or licensed under part 2 of article 3.5 of title 25 who is authorized within his or her scope of practice to draw blood, or a person whose normal duties include withdrawing blood samples under the supervision of a physician or registered nurse may withdraw blood for the purpose of determining the alcohol or drug content of the blood for purposes of this section. In a trial for a violation of subsection (1)(b) of this section, testimony of a law enforcement officer that the officer witnessed the taking of a blood specimen by a person who the officer reasonably believed was authorized to withdraw blood specimens is sufficient evidence that the person was authorized, and testimony from the person who obtained the blood specimens concerning the person's authorization to obtain blood specimens is not a prerequisite to the admissibility of test results concerning the blood specimens obtained. Civil liability does not attach to any person authorized to obtain blood, breath, saliva, or urine specimens or to any hospital, clinic, or association in or for which the specimens are obtained pursuant to this subsection (4) as a result of the act of obtaining the specimens from a person if the specimens were obtained according to the rules prescribed by the state board of health; except that this subsection (4)(d) does not relieve the person from liability for negligence in obtaining any specimen sample.
(e) Any person who is dead or unconscious shall be tested to determine the alcohol or drug content of his blood or any drug content of his system as provided in this subsection (4). If a test cannot be administered to a person who is unconscious, hospitalized, or undergoing medical treatment because the test would endanger the person's life or health, the law enforcement agency shall be allowed to test any blood, urine, or saliva which was obtained and not utilized by a health care provider and shall have access to that portion of the analysis and results of any tests administered by such provider which shows the alcohol or drug content of the person's blood or any drug content within his system. Such test results shall not be considered privileged communications and the provisions of section 13-90-107, C.R.S., relating to the physician-patient privilege shall not apply. Any person who is dead, in addition to the tests prescribed, shall also have his blood checked for carbon monoxide content and for the presence of drugs, as prescribed by the department of public health and environment. Such information obtained shall be made a part of the accident report.
(f) If a person refuses to take, or to complete, or to cooperate in the completing of any test or tests as provided in this subsection (4) and such person subsequently stands trial for a violation of subsection (1)(b) of this section, the refusal to take or to complete, or to cooperate with the completing of any test or tests shall be admissible into evidence at the trial, and a person may not claim the privilege against self-incrimination with regard to the admission of his refusal to take, or to complete, or to cooperate with the completing of any test or tests.
(g) Notwithstanding any provision in section 42-4-1301.1, C.R.S., concerning requirements which relate to the manner in which tests are administered, the test or tests taken pursuant to the provisions of this section may be used for the purposes of driver's license revocation proceedings under section 42-2-126, C.R.S., and for the purposes of prosecutions for violations of section 42-4-1301(1) or (2), C.R.S.
(5) In all actions, suits, and judicial proceedings in any court of this state concerning alcohol-related or drug-related traffic offenses, the court shall take judicial notice of methods of testing a person's alcohol or drug level and of the design and operation of devices, as certified by the department of public health and environment, for testing a person's blood, breath, saliva, or urine to determine his alcohol or drug level. This subsection (5) shall not prevent the necessity of establishing during a trial that the testing devices used were working properly and that such testing devices were properly operated. Nothing in this subsection (5) shall preclude a defendant from offering evidence concerning the accuracy of testing devices.

(1) A person who commits murder in the first degree, as defined in section 18-3-102, and the victim is a peace officer, firefighter, or emergency medical service provider, engaged in the performance of his or her duties, commits the felony crime of first degree murder of a peace officer, firefighter, or emergency medical service provider.
(2) As used in this section, “peace officer, firefighter, or emergency medical service provider engaged in the performance of his or her duties” means a peace officer, as described in section 16-2.5-101, a firefighter, as defined in section 18-3-201(1.5), or an emergency medical service provider, as defined in section 18-3-201(1.3), who is engaged or acting in, or who is present for the purpose of engaging or acting in, the performance of any duty, service, or function imposed, authorized, required, or permitted by law to be performed by a peace officer, firefighter, or emergency medical service provider, whether or not the peace officer, firefighter, or emergency medical service provider is within the territorial limits of his or her jurisdiction, if the peace officer, firefighter, or emergency medical service provider is in uniform or the person committing an assault upon or offense against or otherwise acting toward the peace officer, firefighter, or emergency medical service provider knows or reasonably should know that the victim is a peace officer, firefighter, or emergency medical service provider.
(3) A person convicted of first degree murder of a peace officer, firefighter, or emergency medical service provider shall be punished by life imprisonment without the possibility of parole for the rest of his or her natural life, unless the offense was charged prior to July 1, 2020, and a proceeding held to determine sentence according to the procedure set forth in section 18-1.3-1201, 18-1.3-1302, or 18-1.4-102 results in a verdict that requires imposition of the death penalty, in which event the person shall be sentenced to death. Nothing in this subsection (3) is construed as limiting the power of the governor to grant reprieves, commutations, and pardons pursuant to section 7 of article IV of the Colorado constitution.
(4) In the event the death penalty as provided for in this section is held to be unconstitutional by the Colorado supreme court or the United States supreme court, a person convicted of first degree murder of a peace officer, firefighter, or emergency medical service provider under subsection (1) of this section shall be punished by life imprisonment without the possibility of parole. In such circumstance, the court which previously sentenced a person to death shall cause the person to be brought before the court, and the court shall sentence the person to life imprisonment without the possibility of parole.
(5) The general assembly recognizes that protection of peace officers, firefighters, and emergency medical service providers from crime is a major concern of our state because society depends on peace officers, firefighters, and emergency medical service providers for protection against crime and other dangers and because peace officers, firefighters, and emergency medical service providers are disproportionately damaged by crime because their duty to protect society often places them in dangerous circumstances. Society as a whole benefits from affording special protection to peace officers, firefighters, and emergency medical service providers because the protection deters crimes against them and allows them to better serve and protect our state. The general assembly therefore finds that the penalties for first degree murder of a peace officer, firefighter, or emergency medical service provider should be more severe than the penalty for first degree murder of other members of society.