Tampering with evidence is a felony in Colorado when the underlying investigation involves a felony offense, and a misdemeanor when the underlying matter is a misdemeanor. Under Colorado Revised Statutes Section 18-8-610, felony-level tampering is a Class 6 felony punishable by up to 18 months in prison and fines reaching $100,000.1Justia Law. Colorado Code 18-8-610 – Tampering with Physical Evidence The classification tracks the seriousness of the case being investigated, not the seriousness of the tampering itself.
Felony Penalties for Tampering With Evidence
When the underlying investigation concerns a felony, tampering is charged as a Class 6 felony. The presumptive sentence runs from one to eighteen months in the Department of Corrections, with one year of mandatory parole after release.2Justia Law. Colorado Code 18-1.3-401 – Felonies Classified – Presumptive Penalties Fines range from $1,000 up to $100,000.
Certain offenses the legislature designates as posing an extraordinary risk of harm to society carry a sentence enhancement that adds six months to the Class 6 felony ceiling, raising the maximum to two years. Evidence tampering itself is not on that list, but the underlying felony being investigated sometimes is, and prosecutors occasionally pursue enhanced sentencing when the circumstances support it.
A felony conviction also lands on your record permanently and carries weight far beyond the sentence itself. More on that below.
When Tampering Is a Misdemeanor Instead
If the underlying investigation involves a misdemeanor rather than a felony, tampering drops to a Class 1 misdemeanor. For offenses committed on or after March 1, 2022, that means up to 364 days in county jail and a fine of up to $1,000.3Justia Law. Colorado Code 18-1.3-501 – Misdemeanors Classified – Penalties The 364-day cap is deliberate; it keeps the conviction one day short of the one-year threshold that triggers certain federal immigration consequences.
The gulf between the two classifications is large. One version puts you in state prison with a felony record. The other tops out at jail time and a modest fine. Which one you face depends entirely on what crime investigators were looking into when the tampering occurred.
What the Prosecution Has to Prove
Tampering is a specific-intent crime, which means the prosecution carries a heavier burden than it would for a general-intent offense. Three elements have to come together before a conviction can stand.1Justia Law. Colorado Code 18-8-610 – Tampering with Physical Evidence
First, you had to believe an official proceeding was pending or about to start. You don’t need to know for certain that charges were filed or that a hearing had been set. Believing one was likely on the way is enough. The prosecution can still win a conviction even if the anticipated proceeding never actually materializes or gets dismissed later. What matters is what you believed when you acted.
Second, you had to act without legal right or authority. The statute writes this limitation directly into the offense. A legitimate legal basis for handling, moving, or disposing of the item defeats the charge.
Third, you had to act with the specific intent to impair the evidence, either by undermining its truthfulness or by making it unavailable for the proceeding. Accidentally losing a document, or routinely deleting old files without any awareness of an investigation, does not meet this threshold. Prosecutors have to show deliberate interference with the legal process.
That specific-intent requirement is where many tampering cases are won or lost. Proving what someone intended in the moment they acted is harder than proving what they physically did, and defense strategies tend to focus on that gap.
What Counts as Evidence, and When the Rule Applies
Colorado defines physical evidence broadly. It covers any object, document, record, or other item with physical substance that could be relevant to an official proceeding.1Justia Law. Colorado Code 18-8-610 – Tampering with Physical Evidence Paper records, clothing, weapons, financial documents, and vehicles all fall within that definition.
So do electronic records. Text messages, emails, social media conversations, image files, video recordings, and computer files qualify as physical evidence when stored on a device or server. Deleting a thread of texts after a confrontation can expose you to the same charge as shredding a paper document. Law enforcement often has the technical ability to recover deleted digital files, but the attempt itself creates criminal exposure even when the evidence is ultimately retrieved.
One boundary matters: human bodies, body parts, and human remains are not covered by the tampering statute. Colorado handles those situations separately under Section 18-8-610.5, which carries far steeper penalties as a Class 3 felony with a prison range of four to twelve years.
The “official proceeding” requirement is also broader than many people expect. It covers any hearing conducted by a legislative, judicial, administrative, or other government body with authority to take testimony under oath.4FindLaw. Colorado Code 18-8-501 – Definitions Criminal trials, grand jury sessions, administrative hearings before state licensing boards, legislative committee investigations, and depositions all qualify.
The Mandatory Protection Order
Anyone charged with tampering receives a mandatory protection order at arraignment or the first court appearance. The order prohibits harassing, intimidating, retaliating against, or contacting any witness or victim connected to the case, and it stays in effect until the case reaches final disposition.5Justia Law. Colorado Code 18-1-1001 – Protection Order Against Defendant – Definitions
Violating this order is punishable by contempt of court, which can add jail time on top of whatever sentence the tampering charge itself produces. In domestic violence cases or cases with identified victims, the court can tack on further restrictions: stay-away requirements, firearms surrender, or alcohol and controlled substance prohibitions.
Defenses That Can Apply
Because tampering requires specific intent and several distinct elements, the available defenses are more varied than in many criminal cases.
No belief a proceeding was pending. If you genuinely didn’t know or believe any investigation or proceeding was underway or approaching, the mental-state element fails. Someone cleaning out old paperwork, with no awareness of an investigation, hasn’t committed tampering no matter what those documents contained.
No intent to impair. Even when you knew about a proceeding, prosecutors still have to prove you meant to undermine the evidence. Moving an object for safety reasons, or accidentally damaging a document, does not clear that bar.
Legal right or authority. The statute requires that the person acted without legal right or authority. A legitimate basis for handling, moving, or disposing of the item defeats this element. Routine document retention policies followed in the ordinary course of business sometimes fit here.
Duress. Colorado recognizes duress as a defense when someone was forced to act by threats of unlawful force that a reasonable person could not resist. Coercion by another person to destroy evidence may qualify.
Failure of proof. The prosecution carries the burden of proving every element beyond a reasonable doubt. Attacking that proof directly, by challenging chain of custody, witness credibility, or investigative gaps, is the most common defensive approach in practice.
Collateral Consequences Beyond the Sentence
The court-imposed punishment is only part of what a tampering conviction costs. Colorado’s judicial branch recognizes that a criminal conviction can affect your ability to get certain jobs, obtain professional licenses, and qualify for public benefits or housing.6Colorado Judicial Branch. Relief from Collateral Consequences (Non-Court Consequences)
A felony tampering conviction is particularly damaging. It appears on background checks and signals dishonesty to employers, licensing boards, and professional organizations. In healthcare, law, finance, education, or other regulated fields, a conviction involving evidence manipulation goes directly to trustworthiness and can trigger license discipline or revocation. Colorado permits certain defendants to petition for relief from collateral consequences, but eligibility is limited; those convicted of crimes of violence or offenses causing permanent disability are excluded.
When Federal Charges Take Over
If the investigation involves a federal agency or a case filed in federal court, Colorado’s statute is not the one in play, and the penalty landscape changes dramatically.
Under 18 U.S.C. § 1512, tampering with, destroying, or concealing records or objects to impair their use in a federal official proceeding carries up to 20 years in prison. The same statute covers witness intimidation and broader obstruction, with penalties scaling to 30 years when physical force is involved.7Office of the Law Revision Counsel. 18 U.S. Code 1512 – Tampering with a Witness, Victim, or an Informant
Under 18 U.S.C. § 1519, knowingly destroying or falsifying records to obstruct any federal agency investigation also carries up to 20 years.8Office of the Law Revision Counsel. 18 U.S. Code 1519 – Destruction, Alteration, or Falsification of Records in Federal Investigations and Bankruptcy Enacted after the Enron scandal, Section 1519 is written broadly enough to reach corporate document destruction, falsified financial records, and comparable conduct during any federal investigation, criminal or otherwise. The jump from Colorado’s 18-month maximum to a potential 20-year federal sentence is the kind of escalation that catches people off guard when a state matter crosses into federal territory.