Provides investigation, forensic and litigation support to individuals, companies and firms. Our services include ink age, handwriting, questioned documents, crime scene evaluation, ink analysis, age determination, printer and toner analysis, authenticity, fraud investigations, fingerprints, review of expert witness findings, Daubert and cold case re-investigations. 37 years exp. We would be pleased to discuss the aspects of your case with you.
Chief Forensic Scientist and President Global Forensic Services, LLC (formerly Stewart Forensic Consultants)
San Luis Obispo, California ,
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.
Held the position of Laboratory Director and Chief Forensic Scientist for the United States Secret Service. In that role, 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. Retired from government service in 2005 and began the independent forensic laboratory and consulting firm known as Stewart Forensic Consultants, LLC and its subsidiary, Global Investigative & Intelligence Services. In 2017, the firms combined and became Global Forensic Services, LLC.
Worked on behalf of the U.S. Government as a forensic scientist for over 25 years. During that time worked on many notable cases to include; the Unabomber, numerous accused Nazi war criminals, e.g. John Demanjuk, 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 Quedlinburg Treasure, the Jon Benet Ramsey murder investigation, the 9/11 terrorist attacks and the DC Sniper investigation. Testified as an expert witness in state, federal and military courts of law, as well as testified or been deposed in foreign court systems to include; Austria, Australia, Thailand, Sri Lanka and Canada. Testified as an expert at The Hague in the Netherlands and three times before the U.S. Congress.
December 1975 through March 1979
Laboratory Technician
University of Central Florida
March 1979 through September 1979
Internship
Bureau of Alcohol, Tobacco and Firearms
September 1979 through July 1982
Forensic Chemist
Bureau of Alcohol, Tobacco and Firearms
July, 1982 through June, 2005 (retired)
Counterfeit Specialist
Questioned Document Examiner
Lead, Instrumental Analysis Section
Lead, Instrumental and Computer Analysis Section
Senior Document Examiner/National Expert for the United States Secret Service
Chief, Questioned Document Branch
Assistant Laboratory Director
Laboratory Director/Chief Forensic Scientist
United States Secret Service
June 2005 to February 2017
Chief Forensic Scientist and President
Stewart Forensic Consultants, LLC
February 2017 to present
Chief Forensic Scientist and President
Global Forensic Services, LLC
Instructor:
Bureau of Alcohol, Tobacco and Firearms
Rockville, Maryland
United States Air Force, Office of Special Investigations
Special Investigator's Course
Washington, DC
United States Secret Service
Washington, DC
Federal Law Enforcement Training Center
Glynco, Georgia
Drug Enforcement Agency
Washington, DC
International Law Enforcement Academy
Budapest, Hungary
Naval Criminal Investigative Service
Washington, DC
Rochester Institute of Technology
Rochester, New York
Cuesta College
San Luis Obispo, California
California Polytechnic University
San Luis Obispo, California
Guest Speaker:
Montgomery College
October 1980
Rockville, Maryland
Antioch School of Law
November 1980 and February 1981
Washington, DC
Montgomery College
Ink and Paper Analysis/Instrumental Techniques - February 1982
Rockville, Maryland
DocSec '85
Document Security - May 1985
Washington, DC
George Washington University
Ink and Paper Analysis - February 1986
Washington, DC
Inspector Generals Office - Health and Human Services
Tri-regional Conference - January 1991
Mt. Pocono, Pennsylvania
Bolling Air Force Base
Joint Basic Computer Forensic Workshop - September 1993
Washington, DC
Virginia Military Institute
The Uses of Chemistry and Biology in the Forensic Sciences - April 1994
Lexington, Virginia
UCLA
Forensic Examination of Financial and Identity Documents August 1998
American Society of Questioned Document Examiners meeting
Los Angeles, California
Catholic University
Science Under Oath February 2000
Washington, DC
GATF Conference
Security Printing, Computers and the Forensic Scientist August 2000
Pittsburgh, PA
Fraud Prevention Workshop
Security Printing October 27, 2000
U.S. Department of State
Ft. Lauderdale, Florida
International Association for Identification
Forensic Science and Fraudulent Documents May 2004
Sacramento, California
San Luis Obispo Criminal Bar Association
Getting the Most from Forensic Technology in Criminal Investigations December 13, 2006
San Luis Obispo, California
California Association of Licensed Investigators
Counterfeits Are All Around Us! February 2, 2007
Palm Springs, California
Specialized Tours/Training:
Crane-Weston Paper Mill
Dalton, Massachusetts - July 28, 1982
Philadelphia Mint
Philadelphia, Pennsylvania - July 29, 1982
Bureau of Engraving and Printing
Washington, DC - July 30, 1982
Visa International
San Francisco, California - January 3-6, 1984
Malco Plastics
Garrison Park, Maryland - January 1985
BIS CAP International, Ink Jet Printing Conference
Boston, Massachusetts - September 17-19, 1990
Achievements:
Participated as a "referee " in the 1980 Crime Laboratory Proficiency Training Program Forensic Sciences Foundation, Colorado Springs, Colorado
Testified in May of 1989 and 1990 before the Subcommittee on Oversight and Investigations of the Committee on Energy and Commerce, U. S. House of Representatives. These matters concerned the investigation of fraud in science.
Certified by the US Secret Service as an accredited Examiner of Questioned Documents, February 1, 1991.
Recipient of the Health and Human Services Inspector General's Integrity Award, 1991.
Appointed Chairman of A.S.T.M. task groups (1991) concerned with developing standards for performing \"Writing Ink Comparisons " and "Writing Ink Identifications. "
United States Delegate at the 14th European Meeting on Currency Counterfeiting, The Hague, The Netherlands, October 9-11, 1991 and the First International Conference on Fraudulent Documents, Ottawa, Canada, April 27- May 1, 1992.
United States Delegate at the 6th European Conference for Police and Government Experts, London, United Kingdom, October 2-4, 1996. Presented a paper on Ink Dating, Relative and Absolute: New Approaches to Old Problems.
Testified on July 22, 1999 before the House Judiciary Committee, Subcommittee on Immigration and Claims, U.S. House of Representatives. This matter concerned detection and prevention of counterfeit documents.
Classified as an Inspector� for the American Society of Crime Laboratory Directors.
Elected to the Board of Directors for the American Society of Crime Laboratory Directors, September 14, 2000.
Elected to the Board of Directors for the Document Security Alliance, December, 2003.
Appointed as the forensic consultant for the United Nations, tasked with developing and implementing a successful forensic laboratory in Nigeria, Africa, 2007.
Elected to the Board of Directors for The Academy, June, 2007.
Certified Forensic Consultant, American College of Forensic Examiners Institute, October, 2007.
Original Research Publications/Presentations:
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.
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.
Professional Affiliations:
American Academy of Forensic Sciences - Fellow
Canadian Society of Forensic Scientists (past member)
American Society of Crime Laboratory Directors
Document Security Alliance (past)
Mid-Atlantic Association of Forensic Scientists (past)
California Association of Licensed Investigators
Forensic Expert Witness Association
American College of Forensic Examiners Institute
American Chemical Society
Association For Former Intelligence Officers
Business Espionage Controls & Countermeasures Association
Offices Held:
Mid Atlantic Association of Forensic Scientists
Secretary/Treasurer
November 1981 to October 1984.
American Society of Crime Laboratory Directors
Board of Directors
September 14, 2000 to September, 2003
Document Security Alliance
Board of Directors
December 2003 to November 2004
The Academy
Board of Directors
June, 2007 to present
The American College of Forensic Examiners Institute
Education Committee
July 2012 to present
Forensic Research & Criminology International Journal
Editorial Board
Honorable Editor
June 2015 to present
