Email: | Download V-card

Marci A. Gilligan Criminal Defense Attorney Colorado


Practice Areas:

Criminal Defense | Civil Litigation

Marci Gilligan LaBranche specializes in defense of individuals and entities in all manner of criminal and regulatory actions. Marci has defended clients accused of securities fraud, bank fraud, wire fraud, tax fraud, mortgage fraud and violations of the Clean Water Act.  She has also represented clients before state and federal grand juries and conducted internal investigations on behalf of corporations under criminal and regulatory investigation. 

Marci Gilligan LaBranche has served as trial counsel in some of Colorado’s highest-profile white collar cases, including the insider trading trial of the former CEO of Qwest Communications and the successful defense of a Vice President of Qwest on securities fraud counts.  Most recently, Marci obtained an acquittal on all counts against an executive of a medical devices company charged with various FDA violations related to the alleged importation and use of unapproved medical devices, as well as a pre-trial dismissal of a Federal case charging a conspiracy to defraud the DEA and FDA.

In addition to her white collar practice, Marci represents individuals in all variety of misdemeanors and felonies including sophisticated drug conspiracies, property crimes, computer crimes and crimes against persons. Marci is also a member of the Tenth Circuit CJA Panel.

Awards and Honors

  • Colorado Super Lawyers: 2018
  • Best Lawyers Criminal Defense White Collar 2019
    Best Lawyers Award Badge
  • 5280 Denver’s Top Lawyers 2015-2019
    5280 TopLawyers logo 2019 BW Print
  • Colorado Super Lawyers: 2014 - 2017
    Marci Gilligan LaBranche SuperLawyers 2017
  • Colorado Super Lawyers Rising Star 2010-2013
  • James P. Mize Trial Advocacy Award 2000

Professional Affiliations


  • 10th Circuit Criminal Justice Act Panel: Member (2007-Present); Standing Committee (2014-Present)
  • National Association of Criminal Defense Lawyers
  • Colorado Criminal Defense Bar
  • American Bar Association, Criminal Justice Section, Committee on White Collar Crime 
    (Rocky Mountain Regional Co-Chair, 2009-2011)
  • Faculty of Federal Advocates (Board of Directors, 2005-2007)

Lectures and Publications

  •  Narcotics Offense I
    24th Annual Federal Sentencing Guidelines Seminar, Tampa, FL (May 2015)
  • How to Get Your Client's Original Plea Offer Back From the Government:
    LACDL 23rd Annual Law & All that Jazz Seminar (April 2013)
  • Numerous CLE topics for CJA Panel Attorneys (2010-Present)
  • Racketeering Influenced and Corrupt Organizations Act (RICO): 
    University of Denver Sturm College of Law (March 2011)
  • Money Laundering: 
    University of Denver Sturm School of Law (March 2011)
  • The New Federal Time Computation Rules (2009)
  • Criminal and Regulatory Implications of the Real Estate Crisis (2008)
  • Parallel Proceedings and Discovery in Complex Litigation (2005)

Representative Matters

  • Counsel to individuals and entities appearing before the Colorado Division of Securities and the Securities and Exchange Commission.
  • Trial counsel to medical device executive charged with FDA violations.  Client acquitted by federal jury.
  • Trial counsel to a Vice President of Qwest Communications on mail fraud and securities fraud charges. Client acquitted by federal jury.
  • Counsel to executive of real estate appraisal corporation in connection with investigation of computer crimes.  Federal government declined prosecution.
  • Counsel to individual investigated for mortgage fraud.  Colorado Attorney General declined prosecution.
  • Counsel to individual accused of theft and false imprisonment in state court.  State of Colorado declined prosecution of individual.
  • Conducted internal investigation of large pharmaceutical company concerning allegations of diversion. 
  • Trial counsel to multiple individuals indicted on charges of tax fraud in Federal court.


University of Kansas, J.D. 2000
-  Student Director

Paul E. Wilson Defender Project 1999-2000

University of Kansas, B.A. 1996
-  Academic Departmental Honors

Bar Admissions

  • Colorado State Bar 2000
  • U.S. District Court, District of Colorado 2000
  • U.S. Court of Appeals, Tenth Circuit 2000

Marci Gilligan LaBranche:

Contact Us


303 16th Street, Suite 200 Denver, CO 80202


Phone: (303) 629-9700

Fax: (303) 629-9702

  • denver-law-firm


  • ridley-mcgreevy-winocur-denver-criminal-defense-firm


  • patrick-l-ridley-and-kristen-m


  • ridley-mcgreevy-winocur-criminal-defense