Obstruction of Justice in Colorado: Offenses, Penalties, and Defenses

Obstruction of justice in Colorado is not a single crime but a group of related offenses that punish different ways of interfering with the legal system: blocking a public servant, hindering a peace officer or first responder, resisting arrest, tampering with evidence, tampering with or intimidating witnesses, committing perjury, and filing false reports. Depending on which statute applies and the surrounding facts, the charge can range from a Class 2 misdemeanor with up to 120 days in jail to a Class 3 felony with up to 12 years in prison.

Interfering With a Public Servant or First Responder

Two Colorado statutes cover what most people mean by “obstruction.” C.R.S. 18-8-102 makes it a crime to intentionally use or threaten violence, force, or a physical obstacle to interfere with a public servant performing a governmental function.¹ “Public servant” reaches far beyond police. Blocking a building inspector from entering a property or physically preventing a clerk from processing documents can both qualify. Prosecutors must prove you acted with the conscious purpose of disrupting the government function; an accidental bump in a hallway is not enough.

The statute lists three affirmative defenses: that the public servant was doing something unlawful, that you were interfering with the making of an arrest, or that your conduct was part of lawful activity connected to a labor dispute with the government.¹ Because these are affirmative defenses, you carry the burden of proving them.

C.R.S. 18-8-104 is the parallel statute for peace officers, firefighters, emergency medical providers, rescue specialists, and volunteers. It applies when you knowingly use or threaten violence, force, physical interference, or an obstacle to hinder these responders while they act under their official authority.² Physical contact is not required; a barrier that prevents a paramedic from reaching a patient or a threat that keeps a firefighter out of a burning structure can be enough. The statute defines “obstacle” to include unmanned aircraft systems, so a drone that blocks emergency responders can trigger the charge.

Silence and Verbal Objections Are Protected

The statute expressly says you cannot be charged under it for remaining silent or for verbally objecting to an order from a government official.² Telling an officer you disagree, refusing to answer questions, or declining to consent to a search does not qualify as obstruction. The line is crossed when words turn into threats of force, or when you physically block an officer’s path.

The Color of Authority Rule

Arguing that the officer was acting illegally will not defeat the charge if the officer was operating under color of official authority. The statute defines that phrase to mean the officer made a good-faith judgment, based on the circumstances, that enforcement action was necessary.² Even if the officer is later shown to be wrong on the law, the obstruction charge can stand. The place to challenge an unlawful stop or arrest is in court, not on the street.

Resisting Arrest Is a Separate Charge

Resisting arrest and obstruction get confused constantly, but Colorado treats them as distinct offenses. Under C.R.S. 18-8-103, resisting arrest occurs when you knowingly try to prevent a peace officer acting under official authority from making an arrest by using or threatening physical force.³ Obstruction covers interference with any official duty. Resisting arrest is narrower, aimed at physically fighting an arrest. The same incident can produce both charges.

Tampering With Physical Evidence

C.R.S. 18-8-610 makes it a crime to destroy, alter, conceal, or remove any physical evidence when you believe an official proceeding is pending or about to begin.⁴ Physical evidence covers nearly anything: weapons, paper records, digital files, financial documents. Human bodies and remains fall under a separate statute.

The same law reaches the other side of the problem: creating forged documents or planting false items with intent to have them introduced in an official proceeding. Both forms require a specific mindset. You must intend to undermine the reliability or availability of evidence, and you must believe a proceeding is either underway or imminent.

The classification tracks the underlying investigation. Destroying evidence related to a felony is itself a Class 6 felony; destroying evidence tied to a misdemeanor is a Class 1 misdemeanor.⁴ Flushing drugs during a felony investigation carries very different exposure than tearing up a parking ticket.

Witness Tampering and Witness Intimidation

Colorado splits witness offenses into two charges that look similar on the surface.

Tampering With a Witness or Victim

Under C.R.S. 18-8-707, tampering occurs when you intentionally try to get a witness or victim to testify falsely, withhold testimony, skip a proceeding they have been summoned to attend, or dodge a legal summons.⁵ The statute specifically covers attempts made “without bribery or threats.” Bribes and threats push the conduct into a different, more serious offense. Tampering captures the subtler pressure: persistent lobbying, misleading a witness about their legal obligations, or convincing someone their testimony does not matter.

Intimidating a Witness or Victim

C.R.S. 18-8-704 handles the aggressive end of the spectrum. Intimidation involves threats, harassment, or actual harm directed at a witness, victim, or anyone you believe has information relevant to a criminal investigation.⁶ Targets can include the witness, their family, or people close to them. The goal must be to influence testimony, prevent cooperation with law enforcement, or cause the person to provide false information.

Both offenses are Class 4 felonies, so the statutory penalties are identical on paper.⁶ Courts tend to weigh intimidation more heavily at sentencing because the conduct involves threats or harm rather than persuasion.

Perjury

Lying under oath in an official proceeding is perjury in the first degree under C.R.S. 18-8-502. The prosecution must show that you knowingly made a materially false statement you did not believe to be true, while under an oath required or authorized by law.⁷ The word “materially” carries real weight: the lie must matter to the proceeding, not just be any inaccuracy. You do not need to know your statement was material for the charge to apply, though a court can consider that belief at sentencing. Perjury is a Class 4 felony.

False Reports and Swatting

C.R.S. 18-8-111 covers knowingly filing a false crime report, triggering a false fire or emergency alarm, or feeding law enforcement false information about a crime.⁸ The base offense is a Class 2 misdemeanor. Penalties climb sharply when the false report involves a threat of a deadly weapon, the category Colorado calls “false reporting of an emergency.” This provision targets swatting and similar hoax threats directly.

The escalation tiers reflect the real-world harm the response can cause:

Class 2 misdemeanor for a false emergency report with no aggravating factors.
Class 1 misdemeanor if the report triggers an evacuation, a shelter-in-place order, a school lockdown response, or causes bodily injury.
Class 4 felony if someone suffers serious bodily injury because of the emergency response.
Class 3 felony if someone dies as a result of the emergency response.

On top of any other sentence, a court must order the defendant to pay restitution equal to the cost of the emergency response.⁸ When the false report mobilizes SWAT teams, fire trucks, and ambulances, that bill can be enormous.

Sentencing Ranges by Classification

Misdemeanor obstruction offenses carry these ranges:

Class 2 misdemeanor: up to 120 days in jail and a fine of up to $750. This applies to obstructing government operations, obstructing a peace officer, basic false reporting, and evidence tampering tied to a misdemeanor.⁹
Class 1 misdemeanor: up to 364 days in jail and a fine of up to $1,000. This applies to certain evidence tampering and to false emergency reports that trigger evacuations or cause bodily injury.⁹

Felony obstruction offenses carry these ranges:

Class 6 felony: one year to 18 months in prison and fines of $1,000 to $100,000. This is the classification for tampering with evidence of a felony.¹⁰
Class 4 felony: two to six years in prison and fines of $2,000 to $500,000. This covers witness tampering, witness intimidation, perjury, and false emergency reports causing serious bodily injury.¹⁰
Class 3 felony: four to 12 years in prison and fines of $3,000 to $750,000. This applies to false emergency reports that result in death.¹⁰

Courts can impose prison and fines together or choose one over the other. For offenses Colorado classifies as presenting an extraordinary risk of harm to society, the maximum prison sentence increases: Class 4 felonies gain two additional years, and Class 6 felonies gain six additional months.¹⁰

Collateral Consequences of a Felony Conviction

The prison sentence and the fine are only part of the cost. Any felony conviction in Colorado triggers a firearm prohibition. Under C.R.S. 18-12-108, possessing a firearm after a felony conviction is itself a Class 5 felony, punishable by one to three years in prison.¹¹ The state prohibition has no built-in expiration date for adult convictions, and federal law imposes its own lifetime ban on felons possessing firearms.

Voting rights are lost only while you are actually incarcerated for a felony. Once released, your right to vote is automatically restored, though you still need to re-register through the normal process. Employment fallout is harder to quantify but often more disruptive over time. Background checks are routine, and convictions for crimes of dishonesty like perjury or evidence tampering can be particularly damaging in fields requiring professional licensing or trust.

When Federal Charges Also Apply

Some obstruction conduct can trigger federal charges alongside or instead of state charges, especially where the interference targets a federal investigation, a federal officer, or a proceeding in federal court.

Federal witness tampering under 18 U.S.C. 1512 carries substantially higher penalties than Colorado’s version. Using intimidation or corrupt persuasion to influence testimony carries up to 20 years in federal prison, and where physical force is involved, the maximum reaches 30 years.¹² Destroying records to impede any federal investigation, covered by 18 U.S.C. 1519, carries up to 20 years.¹³

Forcibly resisting or interfering with a federal officer performing official duties is its own federal crime under 18 U.S.C. 111. A simple assault on a federal officer carries up to one year, but if the assault involves physical contact or a weapon, the ceiling rises to eight or 20 years respectively.¹⁴ Federal and state prosecutors can pursue parallel charges for the same conduct, so interfering with a joint federal-state task force operation can put you in both systems at once.

1
Justia Law. Colorado Code 18-8-102 – Obstructing Government Operations
2
Justia Law. Colorado Code 18-8-104 – Obstructing a Peace Officer, Firefighter, Emergency Medical Service Provider, Rescue Specialist, or Volunteer
3
Justia Law. Colorado Code 18-8-103 – Resisting Arrest
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Justia Law. Colorado Code 18-8-610 – Tampering with Physical Evidence
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Justia Law. Colorado Code 18-8-707 – Tampering with a Witness or Victim
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Justia Law. Colorado Code 18-8-704 – Intimidating a Witness or Victim
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FindLaw. Colorado Code 18-8-502 – Perjury in the First Degree
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Justia Law. Colorado Code 18-8-111 – False Reporting to Authorities
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FindLaw. Colorado Code 18-1.3-501 – Misdemeanors Classified – Penalties
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Justia Law. Colorado Code 18-1.3-401 – Felonies Classified – Presumptive Penalties
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FindLaw. Colorado Code 18-12-108 – Possession of a Weapon by a Previous Offender
12
Office of the Law Revision Counsel. 18 U.S. Code 1512 – Tampering with a Witness, Victim, or an Informant
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Office of the Law Revision Counsel. 18 U.S. Code 1519 – Destruction, Alteration, or Falsification of Records in Federal Investigations and Bankruptcy
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Office of the Law Revision Counsel. 18 U.S. Code 111 – Assaulting, Resisting, or Impeding Certain Officers or Employees