Meet Our Team of Attorneys and Consultants

Meet the experienced team at Haltzman Law Firm. The only law firm in Fort Collins with a Medical Doctor and a Toxicologist on staff. We have the experience and resources necessary to represent you and your case with our skilled and knowledgeable Fort Collins criminal defense and personal injury practice group.

Meet Our Team of Attorneys and Consultants

Meet the experienced team at Haltzman Law Firm. The only law firm in Fort Collins with a Medical Doctor and a Toxicologist on staff. We have the experience and resources necessary to represent you and your case with our skilled and knowledgeable Fort Collins criminal defense and personal injury practice group.

Matthew A. Haltzman – Attorney

​Matthew A. Haltzman, the founder of Haltzman Law Firm, P.C. concentrates in criminal law, personal injury law, and civil litigation. In all three areas, he has had extensive experience and achieved notable successes. Matthew was selected as a Super Lawyers® Rising Star for 2019 and 2020. He was also named a “Top 40 Under 40” attorney by the National Trial Lawyers and is Lead Counsel verified in criminal law and civil litigation. He is the former President of the Larimer County Bar Association (YLD) and is currently serving as the President Emeritus to the organization.

Read More

Matthew spent the early years of his career working in government, including the Department of Justice and the United States Attorney’s Office. Matthew worked for the United States Attorney’s Office, Capital Crimes Unit, in the District of Puerto Rico, where he assisted the United States government in the prosecution of violent felons and offenders. Matthew also served as a SLIP prosecuting attorney with the United States Attorney’s Office in the District of Wyoming. As a SLIP prosecuting attorney Matthew obtained a “Confidential” level national security clearance and practiced federal criminal prosecution in Yellowstone National Park and Grand Teton National Park. Prior to working for the United States Attorney’s Office Matthew served as a judicial law extern to the Honorable Judge Richard L. Bourgeois, Jr. in the United States District Court for the Middle District of Louisiana.

Since being admitted to the Colorado Bar, Matthew has successfully represented hundreds of plaintiffs in personal injury, wrongful death, and automobile cases in Colorado and in the Western United States. Matthew also dedicates a considerable amount of his practice towards defending clients charged with crimes in Federal and State Courts. Prior to founding Haltzman Law Firm, P.C.  Matthew practiced federal complex civil litigation with a national law firm in Cheyenne, Wyoming and spent four years after that as a senior trial attorney for a well established personal injury litigation firm in Fort Collins.

​Matthew earned his Juris Doctor and Graduate Degree in Comparative Law, cum laude, from Paul M. Hebert Law Center at Louisiana State University. While in law school, Matthew was awarded the Chancellors Scholar Award and selected for the Chancellors Honor Roll. In his third year of law school Matthew served as the Research Assistant to Vice Chancellor Raymond Diamond. Throughout law school, Matthew competed successfully in numerous trial advocacy competitions. He was elected as the Vice President of Trial Advocacy External Affairs and was a back-to-back recipient of the Ira S. Flory Top Oral Advocate award for trial advocacy. Matthew also competed nationally at the George Mason (Costello) Trial Advocacy Competition in Washington D.C. in 2013 and 2014 where he placed first and fourth respectively, as a member of one of the top criminal defense teams in the country.

Prior to law school, Matthew earned a Bachelor of Arts in Political Science and History, with honors, from Louisiana State University and was inducted into the Honor Society of Phi Kappa Phi his junior year.


  • Colorado
  • U.S. District Court for Colorado
  • Wyoming
  • U.S. District Court for Wyoming
  • Alaska (Inactive)
  • U.S. District Court for Alaska
  • 10th Circuit Court of Appeals

Lance P. Thibert – Attorney

Lance P. Thibert knows that criminal cases do not occur in a vacuum and are often a snapshot of a person’s worst day. Often times the criminal legal process can feel judgmental, humiliating, and dehumanizing. Lance fiercely believes that the dignity of each person must be respected regardless of the accusation against them.

Lance’s career as a criminal defense trial attorney has involved representation of clients in nearly 4500 cases to date. Lance spent 6 years working as a Senior Deputy Public Defender in Larimer County and in that time gained extensive litigation and trial experience working cases encompassing Driving under the Influence, Theft, Domestic Violence, firearm-related charges, Drug Possession/Distribution, Arson, Burglary, Assault, and Homicide. Lance has taken innumerable cases to trial and achieved a favorable outcome.

Read More

Lance’s experience is not limited to the trial courtroom. Lance has been responsible for submitting briefs to the Court of Appeals that went on to produce published opinions along with writing hundreds of legal motions in County and District Court dealing with complex legal issues.

Lance has also acted as a mentor and instructor to aspiring and newly minted lawyers. He has trained several attorneys who have gone on to become excellent trial attorneys. Lance has acted as the subject matter expert in the area of DUI Litigation for the Fort Collins Regional Public Defender Office and has taught many training sessions on nearly every aspect of DUI litigation.

Lance also worked as one of the Public Defender representatives in the DUI Recovery Court in Larimer County. Lance has also filled the same role in a substitute capacity for similar treatment courts including Drug Court, Wellness (Mental Health) Court, and Juvenile Drug Court.

Lance earned his Juris Doctorate from University of Nebraska School of Law and has a Bachelor’s of Arts in Political Science and History from the University of Colorado, Denver. Lance is of counsel to Haltzman Law Firm and is a Fort Collins native. In his spare time Lance enjoys hiking, outdoor rock climbing, and playing ice hockey.


  • Colorado

Douglas M. Dumler – Attorney

Douglas M. Dumler graduated from the University of Nebraska with a Bachelor’s degree in Business Administration and obtained his Juris Doctorate from Suffolk University Law School.

While attending University of Nebraska, Mr. Dumler played football for the Cornhuskers, and was elected co-captain as a senior. Mr. Dumler played in the National Football League (NFL) for three years with the New England Patriots and two years with the Minnesota Vikings. His Viking teammates elected him as co-player representative to the NFL Players Association.

Mr. Dumler is of counsel and focuses on wills, trusts, estate planning and probate administration for clients in Colorado in his practice with Haltzman Law Firm.

Read More

During his NFL career, Mr. Dumler attended law school at Suffolk Law School, in Boston, Massachusetts, and at William Mitchell School of Law, in St. Paul, Minnesota, graduating from Suffolk University Law School in 1979.  Since that time, Mr. Dumler has been in private practice as a shareholder in law Firms in Massachusetts and Colorado. Mr. Dumler has lived in Fort Collins with his wife since 1990 and is a member of the Colorado and Larimer County Bar Associations.

Mr. Dumler’s areas of practice include estate planning and probate administration, workers compensation for professional athletes, real estate, general business and transaction law. Mr. Dumler is a charter member of the panel of workers compensation attorneys established by the National Football League Players Association, and a member of the Regional Advisory Board to the Northern Colorado Community Foundation.


  • Colorado
  • Massachusetts (Inactive) 

Complimentary Case Estimate

Zero Stress!

“Matt was amazing! When I hired him I was in a pretty bad situation. He took care of everything, I continued with my life and knew that he was working hard to sort it out. Long story short. In less than a month everything was sorted out. Couldn’t ask for more. Good guy with great efficiency. Thank you, keep up the awesome practice.”



“The way Matthew handled my case was truly impressive. He’s a true strategist, tactician and advocate. He consulted with me on every legal move and had ideas that I would have never thought of. Matthew was very knowledgeable and shared his expertise upfront in the process regarding my case. He set proper expectations and provided excellent advice along the way. Matthew knows the court system very well and is an excellent communicator. I would venture to guess he’s the best lawyer in Northern Colorado and one of the only Super Lawyers who practices PI and Criminal Defense in Colorado.”

– Ryan

The Best Attorney

“I’m so glad we found Matt Haltzman to take care of our case. He was so easy to work with, kind, and really listened to us. It was such a pleasure working with him. He was so professional and all my worries were gone. I had complete faith in him and he got our entire case dismissed. It would have been devastating to us had he not been such a great lawyer. We barely had to do anything, one meeting and one court appearance and the whole thing was thrown out. I would recommend him to anyone. He worked really hard for us. He is very bright and excellent at what he does. Thank you Matt! You truly saved us.”

– Natalie

Scott Haltzman, M.D. – Medical Consultant

Scott Haltzman, M.D., serves as a medical consultant to Haltzman Law Firm. He is board certified by the American Board of Psychiatry and Neurology and is a Distinguished Fellow of the American Psychiatric Association. He is a graduate of Brown University and received his medical degree from the Warren Alpert Medical School at Brown University. He completed his psychiatric training and chief residency at Yale University, and then practiced psychiatry as part of the Brown University faculty for more than 20 years. From 2012-2015 he served as the senior outpatient psychiatrist at The David Lawrence Center, in Naples Florida, where he was appointed a Clinical Associate Professor of Psychiatry at Florida State University. He currently serves as the Medical Director of Fuller Hospital in South Attleboro, Massachusetts and is a member of the Boston University School of Medicine Faculty.

*Dr. Haltzman is not an attorney and does not provide legal advice. In his role as a consultant Dr. Haltzman does not treat, make medical recommendations or render medical diagnosis.

Gregory Bertoncini, Pharm.D. – Toxicology Consultant

Dr. Bertoncini, Pharm.D., serves as an alcohol forensic toxicology and analytical alcohol toxicology consultant to Haltzman Law Firm. Dr. Bertoncini is a licensed pharmacist and holds a Doctorate in Pharmacy. Dr. Bertoncini has expertise in clinical pharmacology consulting, alcohol toxicology and the alcohol metabolism process in humans. The scope of Mr. Bertoncini’s expertise includes toxicology, alcohol injury causations, adverse alcohol reactions, and forensic aspects of alcohol intoxication.

*Dr. Bertoncini is not an attorney and does not provide legal advice. In his role as a consultant Dr. Bertoncini does not treat, make medical recommendations or render medical diagnosis.

Craig Randall, Pharm.D. – Toxicology Consultant

Dr. Randall joins the Haltzman Law Firm as a pharmacology and toxicology consultant with seven years of experience as a clinical pharmacist. He is a graduate of the University of Rhode Island Doctor of Pharmacy Program, followed by postgraduate residency training. Dr. Randall has expertise in clinical pharmacology, toxicology, adverse drug reactions, medication errors, and forensic aspects of alcohol and drug intoxication. He has experience specifically related to analysis of toxicology results in the emergency department setting, as well as medication errors leading to injury or hospitalization.

*Dr. Randall is not an attorney and does not provide legal advice. In his role as a consultant Dr. Randall does not treat, make medical recommendations or render medical diagnosis.

Kambrie Kriegshauser – Investigator & Paralegal

Kambrie Kriegshauser joins the Haltzman Law Firm as an investigator and paralegal. She is a graduate of Baylor University where she obtained her degree in philosophy. Kambrie takes great pride in her work and makes sure every client gets the service they deserve.