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21 Years
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Denver & Boulder DUI Defense Attorneys
Lancaster Law Office has dedicated its practice to defending clients accused of DUI offenses in Colorado. With nearly two decades of experience and a relentless commitment to protecting constitutional rights, the firm approaches every case as if it will go to trial. Our meticulous preparation identifies critical weaknesses in prosecution cases, offering clients opportunities for dismissal, reduced charges, or alternatives to incarceration.

We combine deep knowledge of DUI law, established relationships with investigators to uncover overlooked evidence, and a client-centered philosophy treating each case as uniquely important. Available 24/7 with free consultations, our team provides accessible legal guidance while maintaining the highest standards of ethical representation in courtrooms across the state.
Services
DUI Defense Felony DUI DMV Hearings License Suspension Defense Criminal Defense
Details
  • Year established: 2005
Highlights and features
  • Over 15 years of focused DUI defense experience
  • 24/7 availability for urgent legal matters
  • Proven track record of case dismissals
  • Client-centered approach treating each case uniquely
  • Established court relationships across Colorado
What people say
Phenomenal in court 100% satisfaction Best legal help Case dismissed Exceptional service
Services
DUI Defense
Our experienced attorneys defend clients facing DUI charges across Colorado. We challenge breathalyzer accuracy, question police procedures, and identify constitutional violations. With trial-ready preparation from day one, we secure dismissals, reduced charges, or alternative sentencing. Our proven strategies address first offenses, repeat violations, and cases involving accidents or injuries.
Felony DUI
We provide aggressive defense for fourth-time DUI charges now classified as felonies in Colorado. Our team challenges excessive sentencing, protects against prison terms up to six years, and minimizes long-term record impacts. We examine all procedural errors and evidence validity to create effective defense strategies.
DMV Hearings
Our legal team specializes in administrative license suspension cases following DUI arrests. We contest DMV proceedings within 7-day deadlines, challenge blood alcohol test validity, and prevent permanent license revocation. This critical defense component maintains clients' driving abilities during criminal proceedings.
DUI Checkpoints
We analyze DUI checkpoint legality according to strict state guidelines. Our attorneys identify procedural violations, challenge improper stops, and suppress evidence from unlawful checkpoints. This specialized defense requires deep understanding of constitutional protections during police roadblocks.
Criminal Defense
Beyond DUI cases, we defend clients facing domestic violence, drug crimes, assault, and other criminal charges. Our approach combines constitutional protection, witness investigation, and strategic negotiation to minimize convictions and preserve future opportunities across Colorado courts.
People
Barry Lancaster
Attorney
Barry Lancaster focuses on DUI defense in Colorado with nearly 20 years of trial experience. He combines aggressive courtroom advocacy with personalized client attention, successfully dismissing multiple cases through strategic evidence challenges while maintaining membership in major legal associations.
Questions
Can DUI charges be reduced?
Yes - Our experienced attorneys identify procedural violations and evidence weaknesses to secure reduced charges or dismissals through strategic legal challenges.
How to handle license suspension?
We contest DMV hearings within 7-day deadlines, challenge test accuracy, and implement strategies to maintain driving privileges during criminal proceedings.
What about out-of-state clients?
As local Colorado attorneys, we handle DUI cases for non-residents including license protection, court representation, and interstate legal implications.
Can field sobriety tests be challenged?
Absolutely - These subjective tests have high error rates. We demonstrate procedural flaws and environmental factors that invalidate alleged impairment evidence.
Is trial better than plea bargaining?
We prepare every case for trial while objectively evaluating plea offers, ensuring you make informed decisions about potential consequences versus trial risks.
How to handle DUI checkpoints?
We analyze checkpoint legality by examining compliance with 20+ Supreme Court guidelines to identify violations that suppress evidence or dismiss charges.