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University of Colorado Denver

National Center for Media Forensics


National Center for Media Forensics

May 2018

The NCMF conducted forensic audio comparison to determine the likelihood ratios of speakers in intercepted recordings against sample audio of identified speakers.
April 2018

NCMF Director Catalin Grigoras is quoted as part of a story outlining AI video manipulation and the forensic detection techniques used to identify inauthentic media.

AAFS 70th Annual Scientific Meeting 
February 2018

The NCMF traveled to Seattle, WA for the American Academy of Forensic Sciences (AAFS) 70th Annual Scientific Meeting. Students, alumni, faculty, and staff gathered at the NCMF reception to celebrate the community's successes.

The Dartmouth Interviews NCMF Director: "Professors Weigh In On Video Manipulation"
February 2018

NCMF Director Catalin Grigoras is interviewed about multimedia forensics and the software FakeApp, which "allows users to digitally superimpose a person's face onto someone else's body."
February 2018

NCMF Director Catalin Grigoras provides forensic insight on Deepfakes, "a machine learning system that can be trained to paste one person's face onto another person's body, complete with facial expressions."

NCMF Works with Pulitzer Prize-Winning Investigative Journalist

December 2017

The NCMF worked with Pulitzer Prize-winning investigative journalist Kevin Hall to provide forensic voice comparison analysis useful in the identification of the Russian general believed to be ordering actions before shootdown of Malaysian passenger jet.

​AES Audio Forensics Conference
June 2017

NCMF faculty, students, and alumni convened at the Audio Engineering Society (AES) International Conference on Audio Forensics which was co-organized by the NCMF.

From left: Jeff Smith, NCMF Associate Director and Conference Co-Chair; Dan Rappaport, Alumnus and Conference Co-Chair; James Zjalic, Student; Catalin Grigoras, Director, Associate Professor and Workshops Co-Chair; Zac Giammarruso, Alumnus; Eliud Bonilla, Alumnus, and Presenter.

August 2016

Denver Westword interviewed Associate Director Jeff Smith about casework, advanced forensic technologies, and the educational programming offered by the National Center for Media Forensics.

March 2016

NCMF Associate Director Jeff Smith is interviewed on The Takeaway by John Hockenberry about the challenges facing the digital and multimedia forensic community and the ever-changing pace of technology.

AES Article on Digital and Multimedia Forensics by NCMF Associate Director Smith

September 2015

AES Journal Article: Digital and Multimedia Forensics

NCMF Associate Director Jeff Smith’s article about the current landscape of Digital and Multimedia Forensics was published in the Journal of the Audio Engineering Society, Volume 63, Issue 9.

“With the increasing pace at which technology changes and the shifting landscape of the forensic sciences, the need for forensic examiners to remain informed and current with research is obvious. It is no longer possible for forensic work to be conducted in isolation, and it is only through collaboration and exchange of ideas that the forensic sciences will truly be strengthened.”

University of Maryland Researcher Builds on Electric Network Frequency (ENF) Techniques Developed by NCMF Director Catalin Grigoras 

June 9, 2015

Terp Magazine Article: Fingerprints of Power

"A pioneering Romanian researcher in ENF analysis, Catalin Grigoras, demonstrated that the extracted ENF signal, among other uses, shows roughly where a recording was made by analyzing frequencies from different electrical grids—such as the twin grids that serve the eastern and western halves of the United States. "

NCMF Provides Key Analysis in Confirming Amnesty International Investigations into Pro-Russian War Crimes in Eastern Ukraine

April 9, 2015

Amnesty International Press Release: New evidence of summary killing of Ukrainian soldiers must spark urgent investigations

Amnesty International representative: "I can't stress enough how helpful your analysis was – it made us much more comfortable referencing the phone conversation/interview, in addition to all the other research we had. All of this helps with our calls for accountability and advocacy work. Thanks again for your speedy help with this!"

AAFS 67th Annual Scientific Meeting 

February 2015

The NCMF traveled to Orlando, Florida for the American Academy of Forensic Sciences (AAFS) 67th Annual Scientific Meeting.                     

Pictured left to right: Roger Schermerhorn (student), Jeff Smith (faculty), Amy Popejoy (student), Marcus Rogers (faculty), Dan Rappaport (graduate), and Megan Pippin (student).

NCMF Interviewed by CNN on Analysis of ISIS Videos

January 28, 2015 

The National Center for Media Forensics (NCMF) continues to forensically analyze ISIS hostage videosNCMF Director Catalin Grigoras and Associate Director Jeff Smith provide insight on the sophistication of the filming and conduct speaker recognition analysisCNN's Erin Burnett OutFront interviewed Jeff Smith about their findings.

Visit to Denver Crime Laboratory

October 22, 2014

Students from the Fall 2014 MSRA-MF cohort visit the Denver Crime Laboratory. Special thanks to Michael Bush in the Forensic Imaging Unit for the tour and learning experience.

CU Denver's NCMF Study ISIS Terrorist Videos for Clues

September 2, 2014

CU Denver's National Center for Media Forensics (NCMF) has been analyzing footage from the latest horrific ISIS execution video to gain insight on the sophistication of the filming of the act itself. NCMF Director Catalin Grigoras and Associate Director Jeff Smith are searching for clues on how the terrorists create the film, the identity of the perpetrator, where the terrorists might have appropriated the equipment, and any edits of the film. For more information from on the ongoing work of the NCMF and researcher's findings collected from the two ISIS videos please visit:

Boston Investigation

April 2013

Manhunt Underway for Marathon Bombing Suspects  Brooke Rogers, News 4 interviews Jeff Smith.

Jeff Smith on CNN's Erin Burnett News Hour CNN.

Colorado Media Forensics Expert Shares Insight On Boston Investigation  Colorado News 4
Jeff Smith from CAM’s National Center on Media Forensics comments on the video and cell phone tracking of the suspects in the Boston Marathon Explosion.

American Academy of Forensic Science 2013 Annual Meeting

February 18-22, 2013

Washington, DC

1-img_0825_206px.jpgMSRA-MF students, graduates, and faculty at the American Academy of Forensic Science Annual Scientific Meeting in Washington, DC February 18-22, 2013.





2-img_0859_206px.jpgMSRA-MF students and graduates attend a workshop at the AAFS conference in Washington, DC, February 19, 2013. The workshop, "Mobile Devices Examination", was co-taught by Sam Brothers of the Dept. of Homeland Security (photographed with a fan of playing cards). His expert card tricks were a welcomed break during the 8-hour workshop.

3-IMG_0861_206x156px.jpgNCMF Faculty Catalin Grigoras, Jeff Smith, and Marc Rogers pictured with their entries in the recently released "Encyclopedia of Forensic Sciences 2nd Ed." (Elsevier). Catalin and Jeff co-wrote the chapters "Audio Enhancement and Authentication" and "Digital Image Enhancement and Authentication" for this seminal work for which Marc is the Digital Evidence section, editor. The four-volume Encyclopedia was released at the AAFS conference in Washington, DC.

"Manti Te'o Girlfriend Hoax: Mastermind Explains Voice Behind Fake Girlfriend"

February 2, 2013


Jeff Smith was interviewed as an expert on Saturday's "Good Morning America" by Lindsey Davis, ABC News in New York. In the interview, Ronaiah Tuiasosopo admits he was the mastermind behind the Manti Te'o girlfriend hoax. From the voicemail, Smith says there is no way Te'o could have known that the voice wasn't a woman but a man.

On January 4, 2013, Jeff Smith, Associate Director of the NCMF, was interviewed by Valerie Castro, a reporter for CBS4 News about a recent incident involving captured cell phone video that could provide valuable evidence in a hit-and-run case. Smith demonstrated how the video cellphone evidence could be gathered and evaluated to prove or disprove a mother's claim about the whereabouts of her daughter during the hit-and-run.

On December 11, 2012, in a recent BBC News article about audio forensics "The Hum That Helps to Fight Crime" referenced National Center for Media Forensics Director, Dr. Catalin Grigoras's pioneering work in audio authenticity and the Electric Network Frequency (ENF).

NCMF Hosts Scientific Working Group on Digital Evidence Meeting

January 14-17, 2013