Gregg M. Stutchman, Forensic Analyst
Expert Witness, Audio-Video Forensics & Forensic Photography
Stutchman Forensic Laboratory
Audio & Video Forensics & Forensic Photography
421 Walnut Street, Suite 120
Napa, CA 94559
707-257-0828 Fax: 707-257-3240
Web Site:


Gregg Stutchman has worked in the criminal justice system since 1973. The first 10 years were spent as a police officer & police administrator, working in all phases of law enforcement. In 1983 he entered the private sector as a State Licensed Investigator doing primarily civil criminal investigations. As both police officer & a State Licensed Investigator, Mr. Stutchman worked extensively with electronics, audio & video recordings & equipment & forensic photography.

In 1992, he opened Stutchman Forensic Audio Video Laboratory, later changed to Stutchman Forensic Laboratory to reflect the expanded services in addition to audio & video forensics. Since opening his lab Gregg has progressively continued his education & training in forensic technology. He has conducted forensic analysis of 2000-3000 recordings, taken thousands of forensic photographs & has testified extensively as an expert witness in courts throughout California & Oregon.


Private attorneys, district attorneys' offices, insurance fraud investigators, private investigators, public defenders, police & sheriffs' departments, State & Federal Government agencies, businesses, insurance companies, corporations & media.


(Including, but not limited to) Forensic analysis of audio & video recordings; voice enhancement from audio & video recordings; demultiplexing & image enhancement from CCTV security videos; preparation of still photos from video recordings; voice identification & comparison; forensic photography including aerial photography, scene photography & evidence photography; photogrammetry; preparation of graphics, demonstrative evidence & trial exhibits; investigations relating to forensic issues.


  • 1992 to Present - Owner/Chief Forensic Analyst & Expert Witness
    Stutchman Forensic Laboratory
    421 Walnut Street, Suite 120
    Napa, CA 94559

  • 1984 to 2003 - Chief Investigator/Owner
    Gregg Stutchman & Associates Investigations - State License PI10186
    421 Walnut Street, Suite 120
    Napa, CA 94559

  • September 1987 to June 1988 - Chief Criminal Investigator
    Napa County Public Defender's Office
    1127 First Street, Room 265
    Napa, CA 94559

  • March 1983 to April 1984 - Investigator/Partner
    North Bay Investigations
    1834 First Street
    Napa, CA 94559

  • June 1980 to March 1983 - Police Captain/Assistant Director
    Department of Public Safety
    Pacific Union College
    Angwin, CA 94508

  • September 1981 to January 1983 - Instructor
    Napa Valley College
    Napa-Vallejo Highway
    Napa, CA 94558

  • February 1977 to June 1980 - Police Officer, Field Training Officer, Reserve Director, Equipment Officer
    Calistoga Police Department
    1234 Washington Street
    Calistoga, CA 94515
    707 942-2810

  • May 1973 to February 1977 - Police Officer, Field Training Officer, Equipment Officer
    Ferndale Police Department
    Post Office Box 125
    Ferndale, CA 95536

  • University of California, Berkeley Extension
  • Pacific Union College, Angwin, California
  • College of the Redwoods, Eureka, California
  • Vocational Teaching Credential- California Community College Level
Certificates & Credentials
  • POST (Peace Officer Standards & Training) Basic Certificate (1977)
  • POST Intermediate Certificate (1979)
  • Community College Teachers Certificate (1981)
  • California State Private Investigators License No. PI10186 (1983)
  • Forensic video Certification (Nov. 2001)
  • Forensic Audio Certification (April 2002)
Specialized Training

Mr. Stutchman has received specialized training & instruction in audio, video & forensics from the following institutions, organizations & individuals: (partial list)

  • Center for Speech Technology, St. Petersburg, Russia
  • New York Institute of Forensic Audio
  • Audio Engineering Society
  • National Association of Broadcasters
  • American College of Forensic Examiners
  • International Association for Identification
  • Adobe Systems, Inc.
  • Cognitech, Inc.
  • Pacific Union College, Digital Media Center, Angwin, CA
  • California Association of Licensed Investigators
  • Nikon Camera Forensic Division
  • B&H Photo
  • Forensic Imaging, Inc.
  • Atlanta Legal Photography Service
  • Snader Video Solutions,
  • Vision Engineering
  • JBR Technology, Inc.
  • Tracer Technologies, Inc.
  • Enhanced audio, Inc.
  • Kay Elemetrics
  • Anite Group, Inc.
  • Evidence Photographers International Counsel, School of Evidence Photography
  • San Bernardino Sheriff's Department, High Tech Crime Detail
  • San Francisco Police Department, Forensic Video Unit
  • Jim Reames, FBI Special Agent in Charge of audio forensics, Retired, President, JBR Technology
  • Ken Graham, Video Engineer, Instructor, Owner, Vision Engineering
  • Steven Eyer, Video engineer, Verizon
  • Treavor Muertha - Digital Media Technology instructor, Audio & Video engineer & director of media services at Pacific Union College.
  • Dr. Lennie Ruden, Phd, Founder of Cognitech, Inc. Former professor of engineering at Cal Tech. Scientist & authority on imaging & forensic video.
  • John Laycock, Forensic Video Engineer & Instructor

Mr. Stutchman has testified as a forensic expert for both prosecution & defense as well as in civil trials & depositions in the field of audio & video forensics & forensic photography on more then 45 occasions throughout California & Oregon.


  • American College of Forensic Examiners
  • American Board of Recorded Evidence (Advisory Committee Member)
  • Audio Engineering Society International
  • Evidence Photographers International Counsel
  • California Association of Licensed Investigators

  • Audio Video Forensics, the rest of the story - 1998
    CDIA Conference, San Jose, CA
  • A Guide to Understanding Audio & Video Forensics
    CALI Conference, Reno, Nevada 2000
  • Uncovering the truth through recorded evidence
    Insurance Fraud Investigators, Allied Ins., Sacramento, CA - 2002

  • Lecturer: Forensic Audio & Video, California Defense Investigators Association, San Jose, CA, November, 1998.
  • Faculty Member/Lecturer: Forensic Audio & Video, The Rest of the Story, California Defense Investigators Association, Reno, NV, June, 1999.
  • Lecturer, Napa County Bar Association: The Value of Recorded Evidence, October, 2000
  • Lecturer, California Association of Licensed Investigators, Sacramento Chapter: The use of Recorded Evidence in Criminal & Civil Cases, January, 2001.
  • Lecturer, Western Region Investigations Conference sponsored by CALI: Forensic Analysis of Recorded Evidence, Reno NV, June, 2001
  • Lecturer, California Association of Licensed Investigators, Santa Rosa Chapter: The use of Recorded Evidence in investigations, September, 2001.
  • Instructor/Lecturer, Insurance Fraud Investigators Training, Allied Insurance Company, Sacramento, CA July, 2002
  • Guest Instructor/Lecturer, Regional Occupational Technology Program, Napa High School, Napa, CA. April, 2003
  • Instructor/Lecturer, California Rural Crimes Prevention Task Force, Sacramento, CA August 2004
  • Consultant/Exhibitor, California District Attorney's Investigators Association: Annual Conference, Sacramento, CA, September 2004
  • Lecturer, California Association of Licensed Investigators, Santa Rosa Chapter: Forensic Issues in Criminal & Civil Investigations, September 2001.

  • Forensic Consultant - San Jose Mercury News
  • Forensic Science Curriculum Advisory Committee - Napa County Office of Education
  • Advisory Committee Member: Regional Occupational Program, Napa High School
  • Audio Editor - KSHC Christian Radio

In October, 2000, Mr. Stutchman's enhancement, forensic analysis & expert testimony regarding an audio recording in a civil case resulted in the largest plaintiff's verdict in the history of El Dorado County, a $7.2 million award.

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