Kass Research Group, LLC

Investigations & Media Powered by Investigative Journalism

  • Casework: Obtain court files, locate medical and other records, photograph evidence and crime scenes... more >>

  • Media
    : Outreach to local and national media. Researched cold case files for national television... more >>

  • People
    : Locate and interview witnesses. Background checks including criminal history, news articles... more >>

The Founder


Jeff Kass has extensive investigative experience in felony criminal cases, from locating court records to assisting at trial and interviewing a wide array of witnesses. His skills have translated into many other areas including research reports, background checks, and Spanish translation.

Kass is the author of Columbine: A True Crime Story, a victim, the killers and the nation’s search for answers (Ghost Road Press 2009), a definitive book on the shootings. The book has been featured in Associated Press, CNN.com, Denver Post, New York Times, USA Today, Wall Street Journal and other media. The book was also on the Denver metro bestseller list and received the bronze medal in the 2010 True Crime category from the Independent Publisher Book Awards. jeffkassauthor.com.

Kass worked as a staff writer at the Rocky Mountain News for ten years, breaking national stories on Columbine, including leaked crime scene photos and 911 tapes. He was a lead reporter on the Kobe Bryant rape case, and covered Hunter S. Thompson for five years. He wrote for the Rocky from Cambodia on a Vietnam War MIA, from Cuba on Colorado businesses doing work there, from Texas on the space shuttle Columbia explosion, and from Virginia Tech on the 2007 shootings.

Kass has written Rocky Mountain region stories for Aspen Magazine, The Boston Globe, The Christian Science Monitor, Chicago Tribune, The Dallas Morning News, Los Angeles Times, Newsday, The New York Times and U.S. News & World Report. Stories include Columbine, JonBenet Ramsey and the Matthew Shepard murder in Wyoming.


PO Box 7056, Denver, CO 80207 jeffkass@thekassgroup.com 303-518-9905
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