Refusing DUI testing in Colorado can create serious consequences even when a person is never convicted of DUI. Under Colorado’s express consent law, anyone who drives on the state’s roads is deemed to have consented to qualifying chemical testing when a law enforcement officer has probable cause to believe the person drove under the influence of alcohol, drugs, or a combination of substances. A refusal can lead to an immediate administrative driver’s license case, a Persistent Drunk Driver designation, extended ignition-interlock and treatment requirements, and evidence that prosecutors may use in the criminal DUI case.

A refusal does not necessarily prevent prosecution. Colorado can pursue DUI or DWAI using driving behavior, officer observations, field sobriety testing, witness statements, body-camera footage, admissions, crash evidence, and other available proof. The refusal itself may also be admitted in court, allowing prosecutors to argue that the driver declined testing because the result would have shown alcohol or drugs.

Colorado DUI Refusal Defense Attorney

DUI refusal cases are frequently more complicated than a standard chemical-test case. The defense may need to determine whether the officer had sufficient legal grounds to request testing, whether the driver was properly advised of the consequences, whether the person actually refused, and whether an injury, language barrier, medical condition, confusion, or police conduct prevented the test from being completed. A written police report may characterize the incident as a clear refusal even when body-camera footage shows an uncertain or rapidly changing interaction.

At the Law Office of Matthew A. Martin, P.C., we understand that refusing or allegedly failing to complete a test can threaten a person’s license long before the criminal case is resolved. Matthew Martin carefully reviews the initial stop, arrest, express consent advisement, statements attributed to the driver, body-camera footage, medical evidence, DMV paperwork, and every claimed act of noncooperation. We defend clients in both the criminal case and the separate administrative process and work to challenge unsupported refusal findings before they create lasting consequences.

If you or someone you love has been accused of refusing DUI testing in Colorado, call (303) 725-0017 or fill out our online consultation form to schedule your free consultation today.

Overview of DUI Test Refusal in Denver, Colorado

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What Is DUI Test Refusal Under Colorado Law?

Colorado’s express consent statute is found in C.R.S. § 42-4-1301.1. The law generally provides that a person who drives a motor vehicle on Colorado streets and highways has already consented to chemical testing when an officer has probable cause to believe the person committed DUI or DWAI. Depending on whether alcohol, drugs, or both are suspected, the requested test may involve breath, blood, saliva, or urine.

A refusal may involve more than directly saying “no.” The state may claim that a person refused by failing to select a test, failing to provide an adequate sample, deliberately interrupting the procedure, refusing to sign or follow instructions, or otherwise failing to cooperate in completing the requested testing. Colorado’s legislative DUI summary expressly identifies refusing to take, complete, or cooperate in completing a required blood, breath, saliva, or urine test as a basis for Persistent Drunk Driver treatment.

Whether the conduct legally amounted to a refusal depends on the entire interaction. A person may have attempted to cooperate but been physically unable to provide a sufficient breath sample, misunderstood the request, asked questions that were interpreted as resistance, or been unable to complete testing because of injury or medical distress. These distinctions can become central at the DMV hearing and in the criminal defense.

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Roadside Breath Tests Versus Evidential Chemical Tests

A preliminary roadside breath test is not the same as the evidential breath or blood test requested after a DUI arrest. Colorado DMV explains that the roadside preliminary breath test does not satisfy the chemical-testing requirement under express consent. It is ordinarily used as an investigative tool to help an officer decide whether probable cause exists.

This distinction is important because declining a voluntary roadside breath test is not automatically the same as refusing the post-arrest evidential test. The administrative refusal consequences generally concern the legally required chemical test requested after the officer claims to have probable cause. A defense attorney should carefully determine which test was offered, when it was offered, and what the officer told the driver.

Field sobriety exercises are also different from chemical testing. Roadside balancing and coordination exercises may be used as investigative evidence, but declining them does not by itself create the same express consent license revocation as refusing an evidential blood, breath, saliva, or urine test. The facts may still be used by an officer or prosecutor, but the legal consequences are not identical.

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When Can an Officer Request DUI Testing?

An officer must generally have probable cause to believe the person drove under the influence or while ability impaired before invoking Colorado’s express consent requirements. Probable cause may be based on driving behavior, a crash, odor of alcohol or marijuana, physical appearance, speech, statements, field sobriety performance, containers in the vehicle, witness information, or a combination of circumstances.

The officer’s belief is not beyond challenge. A traffic violation alone does not necessarily prove impairment, and common observations such as red eyes, nervousness, fatigue, confusion, or poor balance can have innocent explanations. If the officer lacked sufficient probable cause, the resulting test request and administrative action may be subject to challenge.

For alcohol-related investigations, the driver is generally directed to complete an evidential blood or breath test. Drug investigations may involve blood, saliva, or urine depending on the circumstances and the officer’s request. The precise options and procedures can vary based on what substance is suspected, whether testing is reasonably available, and whether emergency or medical circumstances exist.

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What Conduct May Be Treated as a Refusal?

Directly Declining the Test — The clearest refusal occurs when a driver expressly tells the officer that they will not take the requested chemical test. The officer will ordinarily document the statement and submit refusal paperwork to the DMV. The prosecution may later seek to use that decision as evidence in the criminal case.

Failing to Choose or Respond — Silence, indecision, or repeated failure to select between available tests may be characterized as a refusal. However, the surrounding circumstances matter. A driver who was confused, injured, medicated, or unable to understand the officer may have a legitimate argument that the lack of response was not a knowing rejection of testing.

Failure to Provide an Adequate Breath Sample — An officer may report a refusal when the driver does not provide a sufficient breath sample for the machine to complete the test. The legal dispute may involve whether the driver intentionally withheld breath or was physically unable to satisfy the machine. Respiratory disease, panic, pain, injury, age, or improper instructions may be relevant.

Interrupting or Failing to Complete the Procedure — Beginning a test does not necessarily prevent a refusal finding if the person allegedly stops cooperating before the procedure is complete. The defense should examine whether the officer clearly explained what remained necessary and whether the driver had a reasonable opportunity to continue.

Conditional Cooperation — Statements such as agreeing to test only after speaking with an attorney, going to a particular hospital, or obtaining a different form of test may be interpreted as refusal if they prevent timely completion of the officer-directed procedure. Drivers generally do not have an unlimited right to delay chemical testing while seeking legal advice because alcohol and drug evidence may change over time.

Medical or Physical Inability — A person’s inability to complete testing is not necessarily the same as an intentional refusal. Serious injuries, unconsciousness, breathing problems, vomiting, needle-related complications, mental impairment, or other medical conditions may affect whether the person could meaningfully comply. Medical records and video evidence may become important in separating inability from noncooperation.

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Can Police Force a Blood Draw After a Refusal?

A refusal does not automatically authorize law enforcement to use force in every ordinary DUI case. Constitutional rules generally govern when officers may obtain a warrant, rely on a recognized exception, or direct involuntary testing. The legality of an involuntary draw depends on the offense being investigated, the existence of probable cause, any warrant, emergency circumstances, and the manner in which the sample was obtained.

Colorado law contains special testing provisions in serious crash cases, including investigations involving vehicular assault or vehicular homicide. In those situations, officers may have broader statutory authority to obtain testing when the necessary conditions are met, although constitutional protections continue to apply. A refusal in a serious injury or fatality case therefore may not prevent police from obtaining blood evidence.

Even when a blood sample is ultimately obtained, the refusal may remain relevant to the administrative license case. The state may contend that the driver initially refused even though officers later obtained a sample through a warrant or other lawful authority. Defense counsel must evaluate the refusal allegation and the blood-draw legality as separate issues.

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Criminal Penalties When Refusal Accompanies a DUI Charge

Refusal itself is generally handled through administrative license consequences and evidentiary use rather than as a separate ordinary DUI offense carrying its own standalone jail sentence. However, the defendant may still face the full criminal penalties for DUI, DUI per se, or DWAI if convicted of the underlying impaired-driving charge.

First DUI — A first DUI generally carries 5 days to 1 year in county jail, a fine of $600 to $1,000, and 48 to 96 hours of useful public service. The court may also impose probation, evaluation, education, treatment, monitoring, and other conditions.

First DWAI — A first DWAI generally carries 2 days to 180 days in county jail, a fine of $200 to $500, and 24 to 48 hours of useful public service. Although DWAI is a lesser charge than DUI, it remains a criminal offense and can create serious license and record consequences.

Second DUI, DUI Per Se, or DWAI — A person with one qualifying prior generally faces 10 days to 1 year in county jail, a fine of $600 to $1,500, and 48 to 120 hours of useful public service. Repeat cases also carry substantial probation, treatment, and monitoring requirements.

Third DUI, DUI Per Se, or DWAI — A person with two qualifying priors generally faces 60 days to 1 year in county jail, a fine of $600 to $1,500, and 48 to 120 hours of useful public service. The refusal may be used by prosecutors as an aggravating fact when arguing for a sentence within the available range.

Felony DUI — DUI, DUI per se, or DWAI becomes a class 4 felony after three or more qualifying prior convictions arising from separate criminal episodes. A class 4 felony generally carries 2 to 6 years in prison and 3 years of mandatory parole, with additional probationary incarceration and treatment requirements if prison is not imposed.

Additional Financial Consequences — Beyond fines, a refusal case may lead to court costs, treatment costs, probation fees, reinstatement charges, ignition-interlock expenses, SR-22 insurance, towing, storage, lost wages, and increased insurance premiums. Colorado’s legislative summary also notes that DUI cases may include program surcharges, victim compensation charges, and other fees.

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Driver’s License Penalties for Refusing DUI Testing

Refusal penalties are administrative and are imposed through the Colorado DMV rather than solely through the criminal court. The administrative case operates independently from the DUI prosecution, meaning a dismissal or reduction in court does not automatically eliminate a refusal revocation. Colorado DMV expressly describes the court and administrative processes as separate paths.

First Refusal — A first refusal generally results in a one-year driver’s license revocation. The person is also classified as a Persistent Drunk Driver, which can trigger Level II alcohol and drug education and treatment, SR-22 insurance, reinstatement fees, and ignition-interlock requirements.

Second Refusal — A second refusal generally results in a two-year driver’s license revocation. Colorado DMV states that the driver has seven days to request a hearing after a second refusal action. The revocation remains in effect until the driver completes the applicable reinstatement process.

Third or Subsequent Refusal — A third or later refusal generally results in a three-year driver’s license revocation. The driver may also face increasingly demanding treatment, interlock, insurance, and reinstatement obligations, particularly if other alcohol-related restraints or convictions appear on the driving record.

Commercial Driver Consequences — A refusal can also create separate CDL disqualification consequences. Commercial drivers may face at least a one-year disqualification for a first major refusal-related event, a longer period in hazardous-material circumstances, and potentially lifetime disqualification after a second major offense arising from a separate incident. Ordinary early reinstatement does not necessarily restore commercial driving privileges.

No Automatic Restoration After the Time Expires — A revocation does not simply disappear when the stated period ends. Colorado DMV explains that a revoked license is invalid and must be reinstated through the required process. The driver may need to complete treatment, provide proof of insurance, pay fees, install ignition interlock, and satisfy every other restraint before driving privileges are restored.

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Early Reinstatement and Ignition Interlock After a Refusal

Some drivers may qualify for early reinstatement with an ignition-interlock-restricted license rather than serving the entire refusal revocation without driving. Eligibility depends on the person’s age, driving history, other active restraints, statutory waiting period, treatment compliance, and satisfaction of DMV requirements. Colorado DMV advises that early reinstatement may be available after alcohol or drug-related revocations through ignition interlock.

For many adult first-refusal cases, early reinstatement may become available after a waiting period, but the precise rules should be checked against the law in effect on the offense date and the driver’s complete record. Pending 2026 legislation may affect certain reinstatement provisions after its effective date, so drivers should not assume that a rule applying to one case necessarily applies to another occurring later in the year.

An ignition-interlock-restricted license requires the driver to operate only properly equipped vehicles. The device requires a breath sample before the engine starts and may require additional rolling samples while the vehicle is being driven. Installation, calibration, monthly monitoring, insurance, and treatment expenses can make early reinstatement costly even when it allows the person to resume limited driving.

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Persistent Drunk Driver Consequences

Colorado classifies a person who refuses to take, complete, or cooperate with legally required testing as a Persistent Drunk Driver. This designation does not mean the person has necessarily accumulated multiple DUI convictions. A single qualifying refusal may be enough.

Persistent Drunk Driver status can require Level II alcohol and drug education and treatment, SR-22 insurance, ignition interlock, and additional reinstatement obligations. These requirements can continue after the initial revocation period and may create significant financial and scheduling burdens.

Refusal and a high BAC are separate ways of receiving this classification. Colorado’s legislative summary identifies a BAC of at least 0.15, multiple alcohol-related driving actions, driving while restrained for an alcohol offense, and refusal as separate Persistent Drunk Driver grounds.

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Can a Person Still Be Convicted of DUI After Refusing?

Yes. A chemical-test result is powerful evidence, but it is not the only way prosecutors may prove DUI or DWAI. Colorado’s legislative DUI summary notes that alcohol- and drug-related driving offenses may be proven through means other than blood or breath testing. Prosecutors may rely on officer observations, driving conduct, field sobriety performance, statements, video, witness testimony, crash circumstances, containers, drug evidence, and the refusal itself.

The state may argue that the refusal demonstrates consciousness of guilt. The defense may respond that the driver refused because of fear of needles, distrust, confusion, medical concerns, poor advice, misunderstanding, prior traumatic experiences, or another reason unrelated to guilt. The evidentiary value of the refusal depends on the entire context.

The absence of a chemical result can also create difficulties for the prosecution. Without a reliable BAC or toxicology result, the state may have to rely heavily on subjective officer observations. Weak driving evidence, inconsistent reports, poor field sobriety administration, or video that contradicts the officer’s description may create substantial reasonable doubt.

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Colorado DMV Hearings After a Refusal

A driver accused of refusal has the right to request an administrative hearing. Colorado DMV generally requires the hearing request to be made within seven days of the refusal notice. Missing that deadline can allow the revocation to take effect without a contested hearing.

The hearing is separate from the criminal court case and focuses on whether the statutory requirements for administrative revocation were satisfied. Depending on the case, relevant issues may include:

  • whether the officer had lawful grounds to contact or stop the driver;
  • whether probable cause existed for a DUI or DWAI arrest;
  • whether the officer properly requested a qualifying chemical test;
  • whether the driver refused to take, complete, or cooperate in the test; and
  • whether the required paperwork and notice were properly completed.

A favorable DMV decision can protect the person from the refusal-based revocation, but it does not automatically dismiss the criminal DUI case. Likewise, a criminal dismissal does not necessarily reverse an administrative revocation. Both proceedings must be addressed independently.

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Should Drivers Refuse a DUI Test?

Ultimately, it is up to the driver if they want to refuse the test. There are strong penalties for refusing to submit to the test, but if the driver already has multiple DUI convictions, the penalties for refusing to submit to the test may be less than the penalties they could face with another DUI conviction.

In some circumstances, law enforcement can administer a chemical test without the driver’s consent. Usually, an officer cannot physically restrain someone to obtain a sample for testing, but if the incident involved injuries or death to other people and the driver refused to complete a test, the officer could require a blood test without consent.

If at all possible, contacting an experienced criminal defense attorney can help anyone decide their best option when it comes to taking the test or not. A suspected drunk driver should contact an attorney between refusing the field tests and being asked to submit to the evidentiary test.

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Defenses to DUI Refusal Allegations

The Officer Lacked Probable Cause — Colorado’s express consent requirement generally depends on probable cause to believe the person committed DUI or DWAI. If the officer relied only on a minor traffic violation, vague suspicion, or innocent physical observations, the refusal action may lack the necessary legal foundation.

The Driver Did Not Actually Refuse — Police reports sometimes describe hesitation, questions, or confusion as a refusal. Body-camera footage may show that the driver agreed, attempted to cooperate, changed their mind within a reasonable period, or was never given a clear opportunity to complete the test.

Medical Inability to Complete the Test — Asthma, chronic obstructive pulmonary disease, panic attacks, chest injury, facial trauma, neurological conditions, vomiting, or other medical problems may prevent a person from producing an adequate breath sample. A person who physically cannot satisfy the machine may not have intentionally refused.

The Officer’s Instructions Were Confusing or Incomplete — A valid refusal finding may depend on whether the driver understood what was being requested. Contradictory commands, hurried explanations, unclear test choices, or failure to distinguish the roadside breath test from the evidential test may undermine the state’s account.

Language, Hearing, or Communication Barriers — Limited English proficiency, hearing impairment, cognitive disability, intoxication-related confusion, or other communication problems may affect whether the driver knowingly refused. Officers should not assume deliberate noncooperation when the person did not understand the request.

The Driver Was Injured, Unconscious, or Medically Compromised — A person who is unconscious, severely injured, sedated, or undergoing emergency treatment may be incapable of making a meaningful testing decision. Hospital records, paramedic reports, and video may establish that the alleged refusal was actually the product of incapacity.

The Officer Did Not Allow a Reasonable Opportunity to Cooperate — In some cases, an officer declares a refusal too quickly or cuts off the process while the driver is still attempting to understand or comply. The defense may argue that the person was never given a fair and meaningful chance to complete the requested test.

The Requested Test Was Unavailable or Improperly Handled — Testing delays, equipment failures, unavailable personnel, and procedural problems can complicate whether the driver truly caused the test not to be completed. The state should not characterize government or equipment failure as a defendant’s refusal.

The Initial Stop or Arrest Was Unlawful — If the officer lacked reasonable suspicion for the traffic stop or probable cause for arrest, evidence and administrative findings arising from the encounter may be challenged. Constitutional violations can affect both the criminal prosecution and the DMV case.

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Role of a Colorado DUI Refusal Defense Attorney

Requesting the DMV Hearing Immediately — One of the most urgent tasks is preserving the right to an administrative hearing before the seven-day deadline expires. An attorney can help file the request, obtain temporary documentation when available, identify the disputed issues, and prepare to question the officer.

Reviewing Body-Camera and Dash-Camera Footage — Video evidence can show exactly how the test request was explained and how the driver responded. It may reveal unclear instructions, conflicting statements, physical distress, attempted compliance, or an officer declaring refusal before the driver had a meaningful opportunity to decide.

Investigating Medical and Communication Issues — Counsel may obtain hospital records, physician information, respiratory history, medication records, interpreter evidence, hearing documentation, or other proof explaining why the driver could not complete the procedure. These details may be essential when the police report presents the event as deliberate obstruction.

Challenging Probable Cause and the Initial Stop — A refusal case should not begin and end with the driver’s response. Defense counsel examines whether the officer had lawful grounds for the stop, detention, arrest, and test request. If those steps were unsupported, the administrative and criminal cases may be weakened.

Defending the Underlying DUI Without a Chemical Result — The attorney challenges field sobriety testing, driving observations, statements, witness accounts, and the prosecutor’s interpretation of the refusal. Without a valid chemical result, the state may be forced to depend on subjective or inconsistent evidence that can be attacked through cross-examination.

Advising on Reinstatement and Interlock Requirements — The defense must address practical driving issues as well as courtroom litigation. Counsel can help the client understand the revocation, early reinstatement possibilities, treatment requirements, SR-22 insurance, ignition interlock, and the risks of driving before formal reinstatement.

Negotiating or Preparing for Trial — Refusal cases may sometimes be resolved through suppression, dismissal, reduced charges, or negotiated outcomes. When the prosecution will not offer a fair resolution, defense counsel must be prepared to litigate the stop, refusal evidence, officer credibility, and the underlying impairment allegation at trial.

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Frequently Asked Questions

Is refusing DUI testing a separate crime in Colorado?
Refusal is generally not charged as a separate ordinary DUI crime with its own standalone jail sentence. It creates administrative license consequences, Persistent Drunk Driver treatment, and evidence that may be used in the underlying criminal case.

How long will I lose my license for a first refusal?
A first refusal generally results in a one-year revocation. Early reinstatement with ignition interlock may be available in some cases after the applicable waiting period and completion of DMV requirements.

What is the penalty for a second refusal?
A second refusal generally results in a two-year revocation. The driver generally has seven days to request a DMV hearing.

What happens after a third refusal?
A third or subsequent refusal generally results in a three-year revocation, together with Persistent Drunk Driver, treatment, insurance, and ignition-interlock consequences.

Can I refuse the roadside breath test?
A preliminary roadside breath test is different from the evidential chemical test required under express consent. Refusing the roadside screening test generally does not create the same automatic refusal revocation, although the officer may rely on other evidence when deciding whether to arrest.

Can I speak with an attorney before deciding whether to test?
Chemical testing is time-sensitive, and drivers generally do not have an unlimited right to delay the decision while obtaining legal advice. Conditioning cooperation on speaking with counsel may be treated as a refusal if it prevents timely completion.

Can I still be convicted without a blood or breath result?
Yes. Prosecutors may use officer observations, driving conduct, field sobriety evidence, statements, witnesses, video, and the refusal itself. However, the absence of chemical evidence may give the defense significant grounds to challenge the prosecution’s impairment theory.

What if I tried but could not provide enough breath?
Physical inability is different from deliberate refusal. Medical conditions, injuries, anxiety, and improper instructions may explain an inadequate sample and should be documented and presented at the DMV hearing.

What if I changed my mind after initially refusing?
The answer depends on how quickly the person changed their mind, whether testing remained practical, and whether the officer allowed another opportunity. A later agreement does not always cancel a completed refusal, but the timeline and officer’s actions may be challenged.

Can police obtain blood after I refuse?
They may be able to obtain a warrant or rely on other lawful authority in qualifying circumstances, particularly in serious injury or fatal crash investigations. A compelled test and the administrative refusal are separate legal issues.

How quickly must I request a DMV hearing?
The hearing generally must be requested within seven days after the refusal notice. Failing to act can cause the revocation to take effect without a full contested hearing.

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Additional Resources

Colorado Revised Statutes § 42-4-1301.1 — Expressed Consent for the Taking of Blood, Breath, Saliva, or Urine — This is the principal statute governing Colorado’s chemical-testing requirements in alcohol- and drug-related driving investigations. It explains when testing may be requested and the legal consequences associated with failing to take or complete a required test. The current Colorado statutes are available through the Colorado General Assembly.

Colorado DMV — Alcohol DUI and Express Consent — This official DMV resource explains Colorado’s express consent rules, the difference between a roadside breath test and the required evidential test, and the basic consequences of refusal.

Colorado DUI Resources –The Colorado Behavioral Health Administration’s website provides resources for individuals seeking help dealing with DUI and DWI convictions. It has links to different DUI education resources as well as treatment options.

No DUI Colorado – No DUI Colorado is a state-funded source of information to help drivers understand Colorado’s impaired driving laws and how they apply to drivers facing a DUI.

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Finding a DUI Refusal Defense Attorney in Colorado

A DUI refusal allegation can result in a lengthy driver’s license revocation, Persistent Drunk Driver designation, ignition-interlock requirements, treatment obligations, SR-22 insurance, and damaging evidence in a criminal DUI prosecution. These consequences can begin before the court determines whether the person was actually driving under the influence. A driver may have only seven days to preserve the right to challenge the refusal through a DMV hearing.

At the Law Office of Matthew A. Martin, P.C., we defend clients facing refusal allegations, DUI, DWAI, drug DUI, high BAC DUI, and related administrative license actions throughout Colorado. We examine whether the test request was lawful, whether the driver genuinely refused, whether medical or communication problems prevented completion, and whether the prosecution can prove impairment without reliable chemical evidence.

If you have been accused of refusing DUI testing in Colorado, call (303) 725-0017 today or fill out an online consultation form to schedule your free consultation.

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