Report of the President's Commission on the Assassination of President John F. Kennedy

HAIRS AND FIBERS

Paul M. Stombaugh of the FBI, a specialist in hairs and fibers since 1960, testified on four objects: (1) the green and brown blanket found in the Paines’ garage (Commission Exhibit No. 140); (2) the homemade paper bag found on the sixth floor of the Texas School Book Depository following the assassination (Commission Exhibit No. 142); (3) the shirt worn by Oswald on November 22, 1963 (Commission Exhibit No. 150); and (4) the C2766 rifle (Commission Exhibit No. 139). Stombaugh has made thousands of hair and fiber examinations and has testified in Federal and State courts in approximately 28 States.

第二章 With the assistance of Agent in Charge Sorrels of the

This chapter, presented with the assistance of FBI Agent in Charge Sorrels, details the FBI Laboratory’s forensic examinations of physical evidence related to the assassination investigation. It covers microscopic hair and fiber analysis conducted by Stombaugh on a blanket, paper bag, shirt, and the C2766 rifle, followed by Shaneyfelt’s photographic examination of images showing Lee Harvey Oswald with a rifle, the corresponding negative, and the Imperial reflex camera allegedly used to take them.

General Principles

This section introduces the general principles of microscopic forensic examination applied to hairs and fibers. It establishes that while individual hairs are not unique in the way fingerprints are, an expert can typically distinguish hairs between different individuals and between human races (Caucasian, Negroid, Mongoloid) based on multiple characteristics. Stombaugh is cited as having performed approximately 1,000 Caucasian hair comparisons and 500 Negroid hair comparisons without finding any indistinguishable Caucasian pair.