Atty. William Daniel Kellen
William Daniel Kellen is a lawyer practicing speeding & traffic ticket, criminal defense, dui & dwi and 2 other areas of law. William has been licensed for 17 years.
Criminal Defense & More Attorney · Serving Denver, CO · 17+ Years Experience
Profile Summary
About William Daniel Kellen at a Glance
William Daniel Kellen is a dui/dwi, criminal defense, business, traffic, and litigation attorney based in Denver, Colorado. They have 17+ years of legal experience, licensed to practice since 2009. Admitted to practice in Illinois (2009) and Colorado (2010). Educated at DePaul University College of Law (J.D., 2009). Serves clients in Denver, CO and the surrounding metropolitan area.
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About William Daniel Kellen
- William Daniel Kellen is a lawyer practicing speeding & traffic ticket, criminal defense, dui & dwi and 2 other areas of law
- William has been licensed for 17 years
- William practices in Denver, CO
Practice Areas Explained
William Daniel Kellen's Areas of Legal Practice
Each practice area below reflects the types of cases William Daniel Kellen handles, with a practical overview of what that area of law involves and how it may apply to your situation in Denver.
DUI / DWI Defense in Denver
Find experienced DUI and DWI defense attorneys near you. Compare verified profiles, read client reviews, and consult about your case for free.
William Daniel Kellen is one of 29,739 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in Colorado →
Criminal Defense in Denver
A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.
William Daniel Kellen is one of 212,605 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Colorado →
Business & Corporate Law in Denver
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
William Daniel Kellen is one of 497,491 business attorneys indexed nationally. Browse business attorneys in Colorado →
Traffic Violations in Denver
William Daniel Kellen is one of 14,395 traffic attorneys indexed nationally. Browse traffic attorneys in Colorado →
Civil Litigation in Denver
Civil litigation attorneys for breach of contract, business disputes, civil rights, and class action lawsuits.
William Daniel Kellen is one of 450,751 litigation attorneys indexed nationally. Browse litigation attorneys in Colorado →
Jurisdictional Context
Why Local Counsel Matters in Denver
Practicing law in Colorado. Legal matters in Colorado are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Denver are typically filed in the local municipal court or the appropriate Colorado state district court, depending on subject matter and amount in controversy. An attorney licensed in Colorado brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Colorado courts without local counsel or pro hac vice admission.
Denver Courts and Legal Process
Choosing a Denver-based attorney means your counsel already knows the local docketing timelines, preferred filing formats, and how individual judges typically rule on procedural motions — details that only come from practicing in this jurisdiction day after day. That local familiarity can translate to better strategy, faster filings, and fewer costly surprises.
Looking for additional Colorado attorneys? Browse all attorneys in Denver or all attorneys in Colorado.
Frequently Asked
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Professional Profile
Why Clients in Denver Choose William Daniel Kellen
Selecting an attorney is one of the most consequential decisions you can make when a legal matter arises. Below are the core qualities that distinguish William Daniel Kellen's practice in the field of dui/dwi, criminal defense, business, traffic, and litigation.
Decade-Tested Legal Experience
William Daniel Kellen brings 17+ years of hands-on legal practice — enough to have navigated the recurring fact patterns, procedural traps, and negotiation dynamics that shape case outcomes.
Multi-State Bar Admission
Licensed in Illinois and Colorado, William Daniel Kellen can represent clients in cases that span state lines or require counsel in multiple jurisdictions.
Broad Practice Area Coverage
Covering dui/dwi, criminal defense, and business, William Daniel Kellen can address the full spectrum of a client's legal needs without requiring referrals to separate specialists for each issue.
Local Presence in Denver
A Denver-based practice means William Daniel Kellen attends hearings in the same courthouses, knows the local clerks, and understands the unwritten scheduling norms that affect every case filed here.
Case Types
Common Legal Issues William Daniel Kellen Handles in Denver
Below is a representative sample of the types of matters William Daniel Kellen has experience with under Colorado law. If your situation involves one of these case categories, this attorney may be well positioned to help you understand your options.
This list is illustrative, not exhaustive. Contact William Daniel Kellen directly to discuss the specifics of your situation.
Search Reference
How People Find William Daniel Kellen Online
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William Daniel Kellen's Practice Areas & Specializations
Education & Law School Background
Bar Admissions & Licensed Jurisdictions
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