Colorado Assault Charges Explained: Degrees, Penalties, and Defenses

By William Bacharach, Criminal Defense Attorney | Bacharach Law, Denver

Assault charges in Colorado span an enormous range — from a class 2 misdemeanor with a maximum of 120 days in jail to a class 3 felony carrying 4 to 12 years in prison. The degree of the charge depends on intent, the severity of injury, whether a weapon was involved, and the identity of the alleged victim. Understanding these distinctions is critical because the defense strategy for a third-degree misdemeanor assault looks nothing like the strategy for a first-degree felony.

Third-Degree Assault — C.R.S. § 18-3-204

Third-degree assault is the most commonly charged assault across Colorado — in Denver, Aurora, Lakewood, Boulder, Colorado Springs, and every jurisdiction in between. It is a class 1 misdemeanor, punishable by up to 364 days in jail and a $1,000 fine.

The prosecution must prove that you knowingly or recklessly caused bodily injury to another person. “Bodily injury” means any physical pain, illness, or impairment — a bruise, a scratch, redness, or soreness can be enough. You do not need to have caused a broken bone or drawn blood.

Third-degree assault is frequently charged in bar fights, neighbor disputes, domestic arguments, and sporting event altercations. When a domestic violence enhancer attaches — meaning the alleged victim is a current or former intimate partner, co-parent, or household member — the charge triggers mandatory arrest, a mandatory protection order, mandatory DV evaluation and treatment, and a firearms prohibition under both Colorado and federal law.

Even as a misdemeanor, a conviction creates a permanent criminal record. The 364-day maximum (not 365) is intentional — Colorado’s legislature set it below the federal threshold that triggers immigration consequences for non-citizens.

Second-Degree Assault — C.R.S. § 18-3-203

Second-degree assault is a class 4 felony, carrying 2 to 6 years in the Department of Corrections and a $2,000 to $500,000 fine. If the offense involves heat of passion — meaning the defendant acted under a sudden, intense provocation that would cause a reasonable person to lose self-control — the charge is reduced to a class 6 felony (1 year to 18 months).

The prosecution can prove second-degree assault several ways. The most common: intentionally causing serious bodily injury (broken bones, concussions, deep lacerations, loss of consciousness). Other paths include causing injury with a deadly weapon, drugging someone without their knowledge, or injuring certain protected classes of victims (police officers, firefighters, detention officers) while they are performing their duties.

Second-degree assault by strangulation — § 18-3-203(1)(i) — is classified as an extraordinary risk crime under § 18-1.3-401(10), which increases the maximum sentence from 6 years to 8 years. Strangulation cases are prosecuted aggressively across Colorado, particularly in domestic violence contexts. District attorneys in Denver, Arapahoe, Jefferson, and Adams Counties have made these cases a priority.

If a deadly weapon is used or serious bodily injury results and the conduct meets the “crime of violence” definition under § 18-1.3-406, the sentencing changes dramatically. A crime of violence finding eliminates probation as an option and requires a sentence of at least the midpoint of the presumptive range — a minimum of 4 years in prison for second-degree assault.

First-Degree Assault — C.R.S. § 18-3-202

First-degree assault is a class 3 felony, punishable by 4 to 12 years in the Department of Corrections with 3 years of mandatory parole. A heat-of-passion version exists as a class 5 felony (1 to 3 years).

This charge requires proof that the defendant, with intent to cause serious bodily injury, actually caused serious bodily injury by use of a deadly weapon. Alternatively, it covers intentionally disfiguring or destroying an organ, or conduct that creates a grave risk of death.

First-degree assault almost always triggers a crime of violence finding, which means the sentence starts at the midpoint (8 years) and can reach up to 24 years (twice the maximum). There is no probation option.

Common Defenses to Assault Charges in Colorado

Self-Defense

Colorado’s self-defense law (§ 18-1-704) allows a person to use reasonable physical force to defend themselves or another person from what they reasonably believe is the imminent use of unlawful physical force. The force used must be proportional to the threat. Deadly force is only justified when the person reasonably believes it is necessary to prevent death or serious bodily injury, sexual assault, or kidnapping.

Colorado follows the “no duty to retreat” rule — you are not required to flee before defending yourself, including inside your own home under the “Make My Day” law (§ 18-1-704.5). This applies whether you are in Denver, Colorado Springs, Fort Collins, or anywhere else in the state.

Defense of Others

The same principles apply when you use force to protect a third person. If you reasonably believed the other person was about to be unlawfully harmed, and your response was proportional, this is a complete defense.

Lack of Intent

Third-degree assault requires proof that you acted “knowingly or recklessly.” Second-degree assault typically requires “intentional” conduct. If the contact was accidental — you tripped and bumped into someone, you were gesturing and made inadvertent contact — the intent element is not met.

Challenging the Injury

If the prosecution cannot prove “serious bodily injury” in a second- or first-degree case, the charge may be reduced to third-degree assault. Medical records, photographs, and expert testimony all come into play. What looks dramatic at the scene may not meet the legal definition.

Witness Credibility and Identification

Assault cases frequently come down to conflicting accounts. Surveillance footage, witness statements, and physical evidence can contradict the alleged victim’s version of events. When the only evidence is one person’s word against another’s, a defense attorney’s job is to expose inconsistencies and raise reasonable doubt.

Frequently Asked Questions

Can assault charges be dropped in Colorado?

The prosecution — not the alleged victim — decides whether to pursue charges. In domestic violence cases, the victim cannot “drop charges.” However, an attorney can present evidence to the DA’s office that may persuade them to dismiss or reduce the charge before trial. This applies in every Colorado county, from Denver to Douglas to Weld.

Is assault a felony or misdemeanor in Colorado?

Both. Third-degree assault is a class 1 misdemeanor. Second-degree assault is a class 4 felony (or class 6 felony if heat of passion applies). First-degree assault is a class 3 felony. The penalties are set by state statute and apply the same whether the case is filed in Denver, Jefferson, Arapahoe, Adams, Boulder, or any other Colorado jurisdiction.

What is the difference between assault and menacing in Colorado?

Assault requires actual physical contact and injury. Menacing under § 18-3-206 involves placing someone in fear of serious bodily injury through threats or actions — no contact is required. Menacing with a deadly weapon is a class 5 felony.

──────────────────────────────────────────────────

Facing assault charges in Colorado? The stakes are too high to handle alone. William Bacharach is a criminal defense attorney based in Denver who represents clients across the Colorado Front Range — in Denver, Jefferson, Arapahoe, Adams, Douglas, Boulder, Weld, and Broomfield Counties. He examines every detail of the prosecution’s case, from witness credibility to the legal definition of injury to the constitutional validity of how evidence was obtained. Call (720) 303-5778 for a free, confidential consultation — available 24/7.

This article is for informational purposes only and does not constitute legal advice. Every case is different. Contact a qualified criminal defense attorney to discuss the specific facts of your situation.

Frequently Asked Questions

Is third-degree assault a felony in Colorado?

No. Third-degree assault under § 18-3-204 is a class 1 misdemeanor — the most serious misdemeanor classification in Colorado. It carries up to 364 days in jail and a fine of up to $1,000. The 364-day maximum (not 365) is intentional — the legislature set it below the one-year federal threshold that triggers immigration consequences for non-citizens.

What is the difference between second-degree and first-degree assault in Colorado?

First-degree assault under § 18-3-202 is a class 3 felony (4 to 12 years DOC) and requires intent to cause serious bodily injury PLUS use of a deadly weapon that actually causes SBI. Second-degree assault under § 18-3-203 is a class 4 felony (2 to 6 years DOC) and covers a wider range: intent to cause bodily injury with a deadly weapon, intent to cause SBI (even without weapon), strangulation, or assault on peace officers and protected persons. The line often turns on exactly what injuries resulted and what weapon, if any, was involved.

Is strangulation second-degree assault in Colorado?

Yes. Under § 18-3-203(1)(i), applying pressure to a person's neck or blocking their nose or mouth with intent to impede breathing or blood flow is second-degree assault — a class 4 felony AND a crime of violence requiring mandatory DOC sentencing with no probation eligibility. Strangulation cases are prosecuted aggressively across Colorado, particularly in domestic violence contexts in Denver, Arapahoe, Jefferson, and Adams Counties.

What is a crime of violence designation in Colorado?

Under § 18-1.3-406, a crime of violence designation applies when the defendant used or possessed and threatened use of a deadly weapon during the offense, OR caused serious bodily injury or death. The designation requires mandatory sentencing at or above the midpoint of the presumptive range, eliminates probation eligibility, and doubles the minimum sentence. For second-degree assault, this means a minimum of 5 years DOC.

Is self-defense a valid defense to assault charges in Colorado?

Yes. Colorado recognizes the right to use reasonable physical force to defend yourself or others from what you reasonably believed to be imminent unlawful physical force (§ 18-1-704). The force used must be proportionate to the threat and you generally cannot have provoked the confrontation. Colorado also has a "Make My Day" law (§ 18-1-704.5) providing additional protection for occupants using force against home invaders. Self-defense is one of the most commonly and successfully raised defenses in assault cases.

What is heat of passion in Colorado assault law?

Under § 18-3-202(2)(a) for first-degree and § 18-3-203(2)(a) for second-degree, an assault committed in the heat of passion — provoked by a sudden, intense act that would cause a reasonable person to lose self-control — is reduced one felony class. Heat-of-passion first-degree assault becomes a class 5 felony (1-3 years); heat-of-passion second-degree becomes a class 6 felony. The defense is narrow but real and is often critical to plea negotiations.

Can assault charges be dismissed in Colorado?

Yes. Common grounds for dismissal include self-defense (§ 18-1-704), defense of others, lack of intent, insufficient evidence of injury, eyewitness misidentification, video contradicting the prosecution's narrative, and suppression of key evidence. A thorough investigation — surveillance footage from bars and street cameras, witness statements, medical records, and the 911 recording — often reveals weaknesses prosecutors overlooked.

What is the penalty for assault on a peace officer in Colorado?

Assault on a peace officer or other protected person (firefighter, EMT, judge, court officer, code enforcement officer) under § 18-3-203(1)(c) and (c.5) is second-degree assault — a class 4 felony AND automatically a crime of violence. This triggers mandatory DOC sentencing with no probation eligibility, even without deadly weapon use and even without serious bodily injury.