Global Forensic Services, LLC

Global Forensic Services, LLC

Larry F. Stewart, CFC, MSFS

793A East Foothill Boulevard, #200 San Luis Obispo, CA 93405

About the Expert

Offices: San Luis Obispo, CA-GFS is a private forensic lab, specializing in ink dating, forensic ink dating, ink age, questioned documents, fraud, forgery, art age determination, ink, paper, handwriting, fingerprints, counterfeiting, piracy, crime scenes, Daubert and court preparation. Full service document laboratory.

Areas of Expertise

  • Document Examination Forensic
  • Handwriting
  • Ink Dating

Expert's Profile

Our network of forensic scientists, investigators and consultants—local, national and international—provide unmatched forensic and investigative services. We offer a first rate and on-call response to any investigative situation that you may encounter. Our commitment is to provide clients with effective, timely, cost effective services by use of experienced forensic and investigative teams. We are a proud firm. We have successfully completed a myriad of forensic examinations and investigations for our clients, worldwide, for the past 35 years.

Our firm is headed by Chief Forensic Scientist Larry Stewart. He has earned an Associate of Arts degree from Florida Technological University in Orlando, a Bachelor of Science in Forensic Science degree from the University of Central Florida, also in Orlando and a Master of Forensic Sciences degree from Antioch University in Yellow Springs, Ohio. Mr. Stewart has worked for the U.S. Government as a forensic scientist for over 25 years. During his career he has worked on many notable cases to include; the Unabomber, numerous accused Nazi war criminals, e.g. John Demjanjuk, a.k.a. Ivan the Terrible, the reinvestigation of the Dr. Martin Luther King murder, the reinvestigation of the Kennedy assassination/CIA conspiracy theory, the Jon Benet Ramsey murder investigation, the 9/11 terrorist attacks and the DC Sniper investigation. He has testified as an expert witness in state, federal and military courts of law, as well as in foreign court systems to include; Austria, Australia, Canada, Germany, Sri Lanka and Thailand. He has also testified at The Hague in the Netherlands and three times before the U.S. Congress. Mr. Stewart most recently held the position of Laboratory Director and Chief Forensic Scientist for the United States Secret Service. In that role, he managed up to 120 scientists, technicians, and support staff in the areas of document analysis, handwriting, fingerprints, trace evidence, audio and video analysis, photography, toolmarks, computer evidence and counterfeit analysis. After retiring from government service, Mr. Stewart created and acts as the Chief Forensic Scientist for Global Forensic Services, LLC (formerly Stewart Forensic Consultants, LLC) and its subsidiary, Global Investigative & Intelligence Services.

Personal Achievements

Education

  • AA, BS Forensic Science, MS Forensic Science

Licenses

  • Private Investigator CA PI 24990
  • Certified Forensic Consultant
  • Certified Forensic Document Examiner

Special Training

  • federal government training through BATF, USSS, US Air Force, FBI, CIA, and others.

Organizations

  • American Academy of Forensic Sciences (fellow)
  • American Society of Crime Laboratory Directors
  • California Association of Licensed Investigators
  • American College of Forensic Examiners Inst.
  • American Board of Forensic Examiners
  • American Chemical Society
  • Association for Intelligence Officers
  • Business Espionage Controls & Countermeasures Assoc.

Honors

  • Classified as an “Inspector” for the American Society of Crime Laboratory Directors;
  • Appointed as the forensic consultant for the United Nations, tasked with developing and implementing a successful forensic laboratory in Nigeria, Africa, 2007;
  • Appointed as a forensic consultant for the US Department of State, Bureau of International Narcotics and Law Enforcement Affairs in Yerevan, Armenia, January, 2008;
  • Appointed as a forensic consultant for the US Department of State, Bureau of International Narcotics and Law Enforcement Affairs in Tbilisi, Georgia, May, 2008.

Publications

  • "Detection of Volatile Accelerants in Fire Debris. 1. A Comparative Evaluation... " Richard A. Strobel, Richard A. Tontarski, Larry F. Stewart, Philip Wineman presented at the American Academy of Forensic Sciences, New Orleans, Louisiana, February 1980, and the Mid-Atlantic Association of Forensic Scientists, combined meeting, Louisville, Kentucky, May 1980.
  • "Artificial Aging of Documents," L.F. Stewart. Published in the Journal of Forensic Sciences, Vol. 27, No. 2, April 1982.
  • "Ballpoint Ink Age Determination by Volatile Component Comparison," L.F. Stewart, Presented at the American Academy of Forensic Sciences meeting, Orlando, Florida, February 1982, and Mid-Atlantic Association of Forensic Scientists/Northeastem Association of Forensic Scientists joint meeting, Harrisburg, Pennsylvania, April 1982.
  • Published in the Journal of Forensic Sciences, April 1985.
  • "The Role of the Secret Service in Counterfeit Deterrence," L.F. Stewart. Presented at the Mid- Atlantic Association of Forensic Scientists meeting, Baltimore, Maryland, April 1983.
  • "The Forensic Analysis of Printing Inks," Larry F. Stewart. Presented at the American Society of Questioned Document Examiners, Lake Tahoe, Nevada, September 1983.
  • "Counterfeit Credit Card Deterrence," Larry F. Stewart. Presented at the American Society of Questioned Document Examiners/Canadian Society of Forensic Scientists annual meeting, Montreal, Quebec, Canada, September 1985.
  • "Detection of Counterfeit Currency," Larry F. Stewart. Presented at the International Association of Identification conference, Arlington, Virginia, August 1987.
  • "Identification of United States Currency Security Fibers by Fourier Transform Infrared Spectroscopy," J.E. Brown and L.F. Stewart. Presented at the Canadian Society of Forensic Scientists annual meeting, Toronto, Ontario, Canada, October, 1988.
  • "U.S. Secret Service Ink Identification System," J.W. Hargett, J.E. Brown and L.F. Stewart. Presented at the Canadian Society of Forensic Scientists annual meeting, Toronto, Ontario, Canada, October 1988.
  • "Use of Enlargement Ratios of Negatives and/or Printing Plates to Characterize Counterfeit Currency," L.F. Stewart, R.L. Outland and J.E. Brown. Presented at the Canadian Society of Forensic Scientists annual meeting, Toronto, Ontario, Canada, October 1988.
  • "Current Status of Ink Age Determination," L.F. Stewart and S.L Guertin. Presented at the Ninth INTERPOL Forensic Science Symposium, INTERPOL Headquarters, Lyon, France, December 12, 1989. Published in INTERPOL International Criminal Police Review, March-April, 1991.
  • "A.S.T.M. Standard for Writing Ink Comparisons," L.F. Stewart and J.L. Becker
  • Presented at the Mid-Atlantic Association of Forensic Scientists 1991 meeting, Bethesda, Maryland, May 31, 1991.
  • "Standard Guide For Test Methods For Forensic Writing Ink Comparisons," L.F. Stewart (Task Group Chairman). Published in the American Society For Testing and Materials (ASTM), Standard Designation number E-1422-91, November 1991.
  • "Counterfeit Documents Produced by Color Copier Systems," L.F. Stewart, Presented at INTERPOL Headquarters, Lyon, France, December 11-19, 1991.
  • "Sentence Insertions Detected Through Ink, ESDA and Line Width Analysis," S.L. Fortunato and L.F. Stewart. Published in the Journal of Forensic Sciences, November 1992.
  • "Status of U.S.S.S. Ink Dating Program," J.W. Hargett and L.F. Stewart. Presented at the Humboldt University, Berlin, Germany, April 2, 1993. Published in Kriminalistik und Forensische Wissenschaften, No. 82, 1994.
  • "U.S.S.S. International Ink Library and Bulletin Board System," L.F. Stewart. Presented at the Mid-Atlantic Association of Forensic Scientists meeting, Baltimore, Maryland, May 20, 1993.
  • "Standard Guide For Test Methods For Forensic Writing Ink Identifications," L.F. Stewart (Task Group Chairman). Published in the American Society For Testing and Materials (ASTM), Standard Designation number E-1422, 1995.
  • "The Government Response to Ink Age Determination," L.F. Stewart, J.L. Becker. Presented at the American Academy of Forensic Sciences meeting, Seattle, Washington, February 17, 1995. Published in the International Criminal Police Review - INTERPOL, Spring, 1996.
  • “Distinguishing Between Relative Ink Age Determination and the Accelerated Aging Technique,” L.F. Stewart and S.L. Fortunato. Published in the International Journal of Forensic Document Examiners, January/March, 1996.
  • “Forensic Examination of Financial Crimes Documents,” L.F. Stewart and J.W. Hargett. Presented at the 6th European Conference for Police and Government Document Experts, London, United Kingdom, October 2-4, 1996 and the GFS Conference, Luzerne, Switzerland, September 9-12, 1997.
  • “Unusual Document Examination Approaches and Their Relationship to the Daubert Challenge,” L.F. Stewart. Presented at the American Board of Forensic Document Examiners meeting, Las Vegas, NV, June 23, 2002 and the American Society of Questioned Document Examiners meeting, San Diego, CA, August 14, 2002.
  • “Forensic Science – Fake Fingerprints?,” L.F. Stewart, Published in the Forensic Expert Witness Association, Fall, 2007.
  • "Leveling The Playing Field," L.F. Stewart. Presented at the California Association of Licensed Investigators, Central Coast meeting, Pismo Beach, California, December 4, 2008.
  • “Crime Scene Investigation,” L.F. Stewart, on-line course developed for and published by the American College of Forensic Examiners Institute, January 2009.
  • “Identity Theft,” L.F. Stewart, A-Z Literary Book Publisher, 2009. “Document Examination,” L.F. Stewart, A-Z Literary Book Publisher, 2009.
  • “Forensic Science – Fake Fingerprints?,” L.F. Stewart, Published in the HG Experts Legal Experts Directory on-line publication, Spring, 2010.
  • “Forensic Science - The Good and the Bad,” L.F. Stewart, Published in the HG Experts Legal Experts Directory on-line publication, Spring, 2010.
  • “Forensic Science - Erroneous Handwriting Opinions,” L.F. Stewart, Published in the HG Experts Legal Experts Directory on-line publication, Spring, 2010.“Forensic Handwriting Examination - Selecting Your Expert,” L.F. Stewart, Published in the HG Experts Legal Experts Directory on-line publication, Winter, 2011.
  • “Method and System For Detecting Fraudulently Dated Documents- Method For Measuring Evaporation in Ink in Order to Detect Fraudulently Dated Documents,” Provisional Patent filed and accepted with the United States Patent and Trademark Office (Application number 14/811,606, dated 7/28/15).
  • “Document Related Evidence at the Scene of a Crime,” L.F. Stewart, Published in the Forensic Research & Criminology International Journal, April 2017.
  • “The Process of Forensic Handwriting Examinations,” L.F. Stewart, Published in the Forensic Research & Criminology International Journal, April 2017.
  • “Crime Scene Investigation – Explosives,” L.F. Stewart, Published in the Forensic Research & Criminology International Journal, April 2017.

Military service

  • Although I have never served in our military, I have worked on numerous projects and cases involving the armed forces. I have also acted as an instructor.

Prior assignments

  • the Unabomber, numerous accused Nazi war criminals, e.g. John Demjanjuk, a.k.a. Ivan the Terrible, the reinvestigation of the Dr. Martin Luther King murder, the reinvestigation of the Kennedy assassination/CIA conspiracy theory, the Jon Benet Ramsey murder
  • The 9/11 terrorist attacks and the DC Sniper investigation

Percentage of time spent as expert

  • 99%

More Information

Listed in the Following States

Global Forensic Services, LLC is listed with ExpertPages in the following jurisdictions: All US Regions and States, Canada (all Provinces).