David Kalat is a testifying expert in information science and electronic evidence.

He leads the Chicago digital forensics lab for BRG’s Global Investigations + Strategic Intelligence practice. He has over 20 years of experience in digital video, which he applies to the forensic examination of video evidence in a variety of contexts including investigations into alleged police misconduct.

Mr. Kalat is a Certified Fraud Examiner (CFE), a Certified Computer Examiner (CCE), a Certified Information Systems Security Professional (CISSP), an Access Data Certified Examiner (ACE), an Illinois-licensed private detective, and a nonfiction author. He holds a master’s degree in library and information science from the University of Illinois at Urbana-Champaign. He earned his bachelor’s degree from the University of Michigan.

Employment History

Duff & Phelps
Director, Disputes and Investigations
2011 – 2015

Professional Affiliations

Association of Certified Fraud Examiners
Chicago Chapter Member

Forensic Expert Witness Association

Chicago Area Litigation Support Managers

Illinois Private Detective License
#115 002487

International Society of Forensic Computer Examiners

Areas of Expertise


University of Illinois
MLIS, Library and Information Science, 2011

University of Michigan
B.A., Film and Video Studies, 1992


Who’s Who Legal: Global Leader, Digital & Data Forensic Experts 2019