An Historical Perspective of Digital Evidence: A Forensic Scientist's View

TLDR: In the case of as mentioned in this paper, a Postal Inspector submitted a computer to examine for the presence of specific evidence he had enumerated in the letter of request and the evidence technician logged in the computer, assigned it a case number, and brought the request to me, inquiring “What should we do with this?” That was the beginning of an odyssey that I still pursue.

Abstract: Author’s Comments During my tenure as director of the Postal Inspection Headquarters Laboratory (1988-1992), a Postal Inspector submitted a computer to examine for the presence of specific evidence he had enumerated in the letter of request. The evidence technician logged in the computer, assigned it a case number, and brought the request to me, inquiring “What should we do with this?” That was the beginning of an odyssey that I still pursue. The Inspection Service Laboratory had a Questioned Document Section. Since a computer seemed to be an obvious evolution of paper documents, I called the manager of that section, Drew Somerford, and asked him to take the case. He was reluctant to sign for the evidence. Even though there might have been “documents” on the hard drive, it was outside his expertise. How do you secure and preserve the evidence? How do you collect it without changing it? What are the accepted practices related to computer evidence that would stand the scrutiny of court? What are the examination protocols? It was technology that we did not know how to handle in the crime laboratory. We submitted the computer evidence to the Federal Bureau of Investigation (FBI). The FBI Laboratory had a unit for computer evidence, and they worked the case. The Postal Inspection Service had a team of inspectors who were trained to work computer crime cases, but the laboratory was not equipped to assist them in processing evidence at that time.