Attacking Colorado’s Unfair Mandatory Arrest Domestic Violence Laws In 2026

Attacking Colorado’s Unfair Mandatory Arrest Domestic Violence Laws In 2026

By H. Michael Steinberg, A Colorado Criminal Defense Lawyer – Practicing Colorado Criminal Law in the courts of Colorado for over 40 years.

Introduction:

The law: Colo. Rev. Stat. § 18-6-803.6(1) 

“When a peace officer determines that there is probable cause to believe that a crime or offense involving domestic violence … has been committed, the officer shall, without undue delay, arrest the suspected offender”                                                                                                                                               

✓ Key Takeaway

Colorado’s domestic-violence “mandatory arrest” law does not authorize arrest merely because a caller alleges domestic violence.

The statutory duty arises only when the officer has probable cause to believe that a crime or offense involving domestic violence has been committed; therefore, the central defense question is whether probable cause existed for both an underlying offense and the domestic-violence nexus.

Colorado’s Mindless Mandatory-Arrest Framework

Colorado does not create a standalone criminal offense called “domestic violence.” Instead, domestic violence is a statutory classification attached to an otherwise chargeable crime or ordinance violation when the relationship and conduct requirements are met. Colo. Rev. Stat. § 18-6-800.3(1) (2025).

“Domestic violence” includes an act or threatened act of violence against a person with whom the actor has had an intimate relationship.

It can also include another crime against a person, property, or animal when used for coercion, control, punishment, intimidation, or revenge against that person. Colo. Rev. Stat. § 18-6-800.3(1) (2025).

The arrest statute provides:

When an officer determines that probable cause exists to believe a domestic-violence crime or offense occurred, the officer “shall, without undue delay, arrest” the suspected person and charge the appropriate offense. Colo. Rev. Stat. § 18-6-803.6(1) (2025).

That language matters in two ways:

1. It imposes a duty after probable cause is established.
2. It does not reduce the probable-cause requirement.

An arrest, therefore, is subject to attack if the officer lacked a reasonable factual basis to conclude that the arrestee committed an identifiable offense, or if the available evidence did not establish that the offense qualified as domestic violence.

The Two Necessary Probable-Cause Showings

A legally supportable arrest under the statute requires two analytically distinct findings.

Required showing	Core question	Potential defense attack
Underlying offense	Did facts establish probable cause for assault, harassment, criminal mischief, trespass, or another charged offense?	Demonstrate that no crime occurred, the allegation is uncorroborated or materially inconsistent, injury is absent or inconsistent with the account, or conduct was accidental, consensual, privileged, or in self-defense.
Domestic violence classification	Did the conduct involve an “intimate relationship,” and, for nonviolent crimes, was it used as coercion, control, punishment, intimidation, or revenge?	Challenge the relationship status, the nature of the alleged conduct, and the claimed coercive or retaliatory purpose.

The Two Necessary Probable-Cause Showings – A Deeper Dive

1. No Probable Cause for an Underlying Crime

The mandatory-arrest statute applies only where probable cause supports “a crime or offense involving domestic violence.” Colo. Rev. Stat. § 18-6-803.6(1) (2025). Thus, an attorney should force specificity:

What precise offense did the officer believe occurred, and what facts supplied each element?

A generalized domestic dispute, mutual argument, hurt feelings, or a complainant’s desire that police remove the other party is not itself an identified criminal offense.

The officer’s report, body-worn-camera footage, dispatch history, photographs, witness statements, and 911 recording should be evaluated against the actual elements of the charged offense.

The best argument is usually not that police were required to prove guilt before arrest. It is that the known facts, viewed collectively, did not establish a fair basis to believe that a particular crime occurred.

2. No Statutory Domestic-Violence Nexus

The definition has separate paths.

First, domestic violence includes an act or threatened act of violence against a person with whom the actor is or has been involved in an intimate relationship. Colo. Rev. Stat. § 18-6-800.3(1) (2025).

Second, another offense against a person, property, or animal may qualify only if it was used as a method of “coercion, control, punishment, intimidation, or revenge” directed at a person in such a relationship. Colo. Rev. Stat. § 18-6-800.3(1) (2025).

For a nonviolent underlying allegation, Colorado criminal defense lawyers need to demand that the prosecution identify evidence of the statutory purpose.

For example, property damage between former partners is not automatically domestic violence merely because the parties once dated; the State must be able to support the required coercive, controlling, punitive, intimidating, or retaliatory use of the conduct. Colo. Rev. Stat. § 18-6-800.3(1) (2025).

2 a.- No “Intimate Relationship”

The statute defines an intimate relationship as one between:

• spouses or former spouses;
• past or present unmarried couples; or
• persons who are parents of the same child, whether or not they were married or lived together. Colo. Rev. Stat. § 18-6-800.3(2) (2025).

This creates a potentially important threshold issue in disputes involving roommates, acquaintances, extended family members, coworkers, neighbors, or persons whose alleged dating relationship is disputed. The relationship should be investigated rather than presumed from a complainant’s label.

Mutual-Combatant and Self-Defense Cases

Colorado expressly directs officers responding to cross-complaints to evaluate each complaint separately. Colo. Rev. Stat. § 18-6-803.6(2) (2025). In deciding whether one or more crimes occurred, an officer must consider:

1. Prior domestic-violence complaints;
2. The relative severity of injuries;
3. The likelihood of future injury; and
4. The possibility that one person acted in self-defense.

This provision is particularly useful where police accepted one party’s accusation while minimizing the other party’s injuries, statement, or defensive explanation. The statute does not require the arrest of both parties merely because each accuses the other; in fact, it expressly rejects that premise. Colo. Rev. Stat. § 18-6-803.6(1) (2025).

But the statute also does not permit a reflexive “primary aggressor” conclusion untethered to its required considerations. A defense investigation should compare the report and recordings against each statutory factor.

Statutory consideration Evidence	Evidence to Obtain	Significance
Prior complaints	CAD history, prior reports, protection-order records	Determines whether the officer actually considered history and whether it was accurately characterized.
Relative injuries	Photographs, medical records, booking photographs, body-camera video	May show that the arrestee sustained more serious injuries or that the complainant’s account is implausible.
Future-injury risk	Statements, threats, separation history, scene conditions	May expose conclusory risk assessments.
Self-defense	911 call, contemporaneous texts, witness accounts, video, physical layout	May negate probable cause or materially undermine the prosecution’s theory.

Evidence Preservation Is the First Litigation Priority

The police are held to their investigation. Law enforcement must make reasonable efforts to collect and preserve pertinent evidence through final disposition, including dispatch recordings, on-scene audio or video, medical records of the alleged victim or defendant, other physical evidence, and witness statements. Colo. Rev. Stat. § 18-6-803.6(4)(a)(I)–(IV) (2025).

Key points from § 18‑6‑803.6(2)

If a peace officer receives complaints of domestic violence from two or more opposing persons, the officer must evaluate each complaint separately to determine if a crime has been committed by one or more persons.

In making this determination, the officer must consider:

• • Any prior complaints of domestic violence
  • The relative severity of the injuries inflicted on each person
  • The likelihood of future injury to each person
  • The possibility that one of the persons acted in self‑defense

Criminal defense lawyers need to act Promptly seek preservation of:

• 911 calls and computer-aided-dispatch logs;
• officer body-worn-camera footage;
• patrol-car, jail, and interview-room video;
• photographs taken by officers, witnesses, and either party;
• texts, social-media messages, call logs, and location data;
• medical, EMS, and booking records;
• apartment, business, doorbell, and neighborhood surveillance footage;
• recordings and notes from dispatch or victim-advocate contacts; and
• names and contact information for every witness identified at the scene.

The statute contains an important limitation: absent bad faith, a failure to collect or preserve the listed evidence is not, in itself, a ground to dismiss the case. Colo. Rev. Stat. § 18-6-803.6(4)(b) (2025). On the other hand, this area is ripe for using the missing evidence to develop the factual defense, seek appropriate discovery relief where warranted, and establish prejudice if the governing procedural and constitutional standards are met.

Litigation Routes After an Arrest

Suppression of Evidence Motions

An unlawful arrest theory does not automatically eliminate the criminal charge. Its most immediate practical use is often a motion to suppress evidence obtained as a result of the arrest, such as post-arrest statements, physical evidence, or custodial communications.

The suppression analysis will turn on the precise evidence sought to be excluded, the timing of the arrest, whether a warrant existed, and the asserted causal connection between the allegedly unlawful arrest and the evidence.

Counsel should carefully plead the factual record rather than treating “mandatory arrest” as an independent exclusionary-rule doctrine.

Challenge to the Domestic-Violence Designation

If the underlying offense remains viable but the relationship or coercive-purpose evidence is deficient, consider litigating whether the domestic-violence designation is legally and factually supportable. This can affect mandatory protection-order conditions, firearms restrictions, no-contact provisions, bond conditions, treatment consequences, and collateral effects.

Colorado law requires certain firearm-related provisions in a mandatory protection order when the court finds, on a probable-cause review, that the order includes a domestic-violence crime involving the threatened, attempted, or actual use of physical force. Colo. Rev. Stat. § 18-1-1001(9)(a) (2025). The factual and statutory basis for the domestic-violence designation should therefore be examined early, not merely at trial.

Trial Defense

At trial, the statutory arrest requirement does not substitute for proof beyond a reasonable doubt. The prosecution must prove the elements of the charged offense, while the domestic-violence allegation requires evidence satisfying the applicable statutory definition.

The defense should preserve separate arguments concerning:

• identity;
• credibility;
• intent;
• self-defense;
• absence of a criminal act;
• absence of an intimate relationship; and
• absence of a coercive, controlling, punitive, intimidating, or retaliatory purpose for a nonviolent offense.

Finally: A Practical Defense Checklist

1. Identify the exact underlying offense listed in the summons, complaint, affidavit, or arrest report.
2. Separate the offense analysis from the domestic-violence analysis.
3. Obtain and preserve all contemporaneous recordings immediately.
4. Map every asserted fact to an element of the underlying offense.
5. Test the intimate-relationship allegation against the statutory definition.
6. For property or other nonviolent crimes, demand evidence of statutory purpose.
7. Develop self-defense evidence independently of the police report.
8. Assess suppression issues evidence by evidence, including causation and remedy.
9. Address the protection order and firearms consequences at the earliest available hearing.

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Colorado Criminal Law – Attacking Colorado’s Unfair Mandatory Arrest Domestic Violence Laws In 2026

The reader is alerted that Colorado criminal law, like criminal law in every state and at the Federal level, changes constantly. The article above was accurate when it was drafted, but it cannot account for changes that occurred after it was uploaded.

ABOUT THE AUTHOR: H. Michael Steinberg – Email the Author at: hmsteinberg@hotmail.com

A Denver, Colorado Criminal Defense Lawyer – or call his office at 303-627-7777 during business hours – or call his cell if you cannot wait and need his immediate assistance – please call 720-220-2277.

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You should be careful to make a responsible choice when selecting a Colorado criminal defense lawyer. We encourage you to “vet” our firm. Over the last 40 years – by focusing ONLY on Colorado criminal law – H. Michael has had the time to continually update himself in nearly every area of criminal law, including Colorado criminal law, procedure, and trial and courtroom practice.

H. Michael works hard to deliver the best possible results for his clients, both in and out of the courtroom. He has written extensively on Colorado criminal law and continues to do so, and he hopes this article helps you in some small way.