About Our Forensic Document Staff

Forensic Document Examiners, Inc. consists of a staff dedicated to providing professional services in a timely manner in the field of questioned documents.


Katherine Mainolfi Koppenhaver, Certified Questioned Document Examiner

Katherine Koppenhaver, Certified Document Examiner

Curriculum Vitae (PDF)
Books and articles
Phone: 410-679-8257
Email: ForDocExam@aol.com

Katherine Koppenhaver has been a document examiner, also known as a handwriting expert, since 1983 and a Certified Forensic Document Examiner since 1986. She is past president of the National Association of Document Examiners (NADE) and former editor of the Communique, NADE's quarterly newsletter. Ms. Koppenhaver founded the International Association of Document Examiners (IADE) in 2015. She is currently President of the IADE.

  • Consults on cases for her peer on a regular basis and helps to train other document examiners
  • Has been appointed to assist judges in making decisions in cases involving questioned documents and has served as a single joint expert on cases

Ms. Koppenhaver wrote Attorney's Guide to Document Examination published by Greenwood Publishers, and also wrote a college textbook: Forensic Document Examination, Principles and Practice, published by Springer.

In 2013, Ms. Koppenhaver was presented with a Lifetime Achievement Award from her fellow document examiners. It reads: "In recognition and appreciation for more than three decades dedicated to the profession of forensic document examination through research, teaching, training and publication."


William A. Koppenhaver, Forensic Document Photographer

William Koppenhaver, Forensic Document Photographer

Curriculum Vitae (PDF)
Examples of exhibits
Email: Wkopp@aol.com

Mr. Koppenhaver has completed courses in Forensic Science and Criminal Justice, and has received specialized training in his field through NADE and the Evidence Photographer's International Council (EPIC). Bill Koppenhaver photographs documents using micro-photography and is a specialist in exhibit-preparation for courtcases. He writes a bi-monthly column in the NADE newsletter entitled "High Tech," and lectures on technical matters. He is a member of NADE and EPIC.


Diana Mears, Certified Questioned Document Examiner

Diana Mears is an associate with Forensic Document Examiners. She spent four years training with Katherine Koppenhaver before joining our team full time. She is a Certified Questioned Document Examiner with IADE.