Secondary Transfer of Human Scalp Hair

    Volume 32, Issue 5 (September 1987)

    ISSN: 0022-1198

    CODEN: JFSOAD

    Published Online: 1 September 1987

    Page Count: 13


    Tessarolo, AA
    Undergraduate student, University of Waterloo, Waterloo, Ontario

    Gaudette, BD
    Chief scientist—Hair and Fibre, Central Forensic Laboratory, Royal Canadian Mounted Police, Ottawa, Ontario

    (Received 18 July 1986; accepted 3 November 1986)

    Abstract

    Secondary transfer of hair occurs when a person transfers hair that is not his or her own to an object, place, or other person. Since it is possible that the perpetrator of a crime may have transferred hairs picked up from previous associations, secondary transfer can affect the value of associative hair comparison evidence. Nine experiments were conducted as a preliminary attempt to obtain information on hair transfer mechanisms and the role of some of the variables involved, as well as to get a preliminary indication of the extent and importance of secondary hair transfer. Indirect hair transfer mechanisms were found to be much more common than direct transfer mechanisms. This study further showed that secondary transfer of human scalp hair can and does exist in casework situations. However, the extent of secondary transfer was found to be extremely variable. Some factors that can affect the likelihood of secondary transfer in a given situation are discussed. The persistence of human scalp hairs on clothing was found to be quite similar to the persistence of extraneous fibers on clothing.


    Paper ID: JFS11175J

    DOI: 10.1520/JFS11175J

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    Author
    Title Secondary Transfer of Human Scalp Hair
    Symposium , 0000-00-00
    Committee E30