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Dave embarked on his professional journey as a prosecutor in the Denver District Attorney's office. Subsequently, he transitioned to the US Attorney's Office in Denver, where he assumed the role of Coordinator for the Mountain States Drug Task Force. This position was part of the newly formed Organized Crime Drug Enforcement Task Force in 1982.
In 1985, then Governor Lamm appointed Dave as the District Attorney for the First Judicial District of Colorado, encompassing Jefferson and Gilpin Counties. After being elected in 1993, he continued to serve as the District Attorney until 2005, when term limits concluded his tenure.
Governor Romer appointed Dave as the Executive Director of the Colorado Department of Public Safety in 1987, a position he held until his election as District Attorney in 1993. During his time in this role, he participated in the Harvard University Executive Course for Senior Government Executives.
For a three-year period starting in 2005, Dave assumed the position of Executive Director of the District Attorney's Council. Within that time frame, he was also designated as the Acting District Attorney in the Fifth Judicial District, which encompasses Huerfano and Las Animas Counties. This appointment was made by the Chief Judge for the Fifth Judicial District.
In 2008, Dave joined Defense Attorneys Maureen O'Brien and Fred Bibik, practicing criminal defense until 2022. In October 2022, he formed a professional partnership with his daughter, Attorney Carrie Kollar. Throughout his career, Dave has gained extensive experience in litigating various criminal cases, including sex crimes, DUIs, drug offenses, murder cases, crimes against children, felonies, traffic violations, and financial crimes.
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Practice Areas
17 years | 80 cases
17 years | 30 cases
17 years | 20 cases
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Chat withState: Colorado
Acquired: 1973
No misconduct found
2801 Youngfield St, STE 300, Golden, CO, 80401
Showing 1 - 5 of 18 client reviews from Avvo
Posted by James | June 16, 2023 | Hired Attorney
I was originally referred to Maureen O'Brien at O'Brien, Thomas and Bibek, LLC law firm by my personal attorney. Maureen was unable to take my case due to illness but she recommended David and he accepted my case. David provided invaluable professional and discreet assistance in the court room whil...
Posted by anonymous | May 14, 2022 | Hired Attorney
Dave accepted my case and went right to work. He provided great information, guidance and expertise. He was also very prompt with communication and professional throughout the entire criminal process. He guided me through the decision process of a plea agreement or a trial and gave me the pros and...
Posted by Robin | December 5, 2021 | Hired Attorney
Dave Thomas is an exceptional attorney! we highly recommend him, for anyone seeking an ethical, caring attorney, who will work to get the best resolution for your case. From our first meeting with Dave to discuss our son’s case, it was clear that he is a passionate advocate for his clients. In our ti...
Posted by anonymous | August 20, 2021 | Hired Attorney
Dave Thomas is an exceptional and excellent lawyer, whom I had the good fortune to hire. He is incredibly skillful, experienced, knowledgeable and hard working. He communicates well through every step of the trial process. His legal assistant and firm are excellent, too. I am very pleased with t...
Posted by Richard | April 13, 2021 | Consulted Attorney
Mr. Thomas was appointed to me by the court and he went above and beyond to gain a successful outcome to my case. He also helped me get into a community service program that accommodated my brain injury disability and he went to court with me pro bono once he was off my case. I've had many lawyers i...
"I endorse this lawyer. Dave is a fantastic lawyer who any client is lucky to have. Dave knows absolutely everyone in the criminal justice system and this allows him to reach the very best outcomes for his clients. He knows how prosecutors think from his long experience as one and uses that knowledge to reach the right resolution. Dave knows which cases should settle and which one should hold out for a trial. On top of all of that, Dave genuinely cares about and worries for his client. He puts 100% effort into all of his cases and his clients are in excellent hands."
"I endorse this lawyer. I have known Dave Thomas for over 25 years. No one knows the criminal justice system better than Dave. He has extensive experience on both sides of the courtroom, having served as the elected DA for years and now with years of experience defending criminal cases. I have observed Dave making presentations in court, observed him interacting with and making his case to prosecutors, judges and opposing counsel. Dave is an extremely effective lawyer. He has the ability to quickly identify the issues in a case and then work to resolve or defuse them to achieve the best possible result for his clients."
"I endorse this lawyer. When Dave Thomas was the elected District Attorney in Jefferson County, we were friendly adversaries. I admired his ethics and compassion, and now we are law partners. Our clients really appreciate the care and dedication Dave gives to them, and his experience and skills are a real asset to the firm."
Criminal defense lawyer
Juvenile law lawyer
2012
Top 100 Trial Lawyers, National Trial Lawyers
2005 - 2008
Executive Director, Colorado District Attorneys' Council
1993 - 2005
District Attorney, 1st Judicial District, District Attorney's Office
1986 - 1993
Executive Director, Colorado Department of Public Safety
1985 - 1986
District Attorney, 1st Judicial District, District Attorney's Office
1983 - 1985
Assistant U.S. Attorney, United States Attorneys' Office
1973 - 1983
Chief Deputy D.A., Denver District Attorney's Office
2012 - Present
1st Judicial District Community Corrections BoardBoard of Directors
2008 - Present
Colorado Criminal Defense Bar Associationmember
2004 - 2012
1st Judicial District Judicial Performance CommissionCommission Member
1973
J.D.
1970
B.S