Tool Mark Striations in Pig Skin Produced by Stabs From a Serrated Blade

Derrick J. Pounder, Shivani Bhatt, Lesley Cormack, Bill A. C. Hunt

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    Stab wounds produced by serrated blades are generally indistinguishable from stab wounds produced by nonserrated blades, except when visible tool mark striations are left on severed cartilage. Using a pig-skin experimental model, we explored the possibility that similar striations may be left in skin. Stabs into pig skin were made using a straight spine coarsely serrated blade (121), a drop point finely serrated blade (20), a clip point irregular coarsely serrated blade (20), a drop point coarsely serrated blade (15), and as controls 2 nonserrated blades (40). Tool mark striations could be seen on the skin wall of the stab canal in all stabs made using serrated blades but in none with nonserrated blades. The striation pattern, reflecting the class characteristics of the serrated blade, was the same as that described in cartilage but less well defined. Fixation of the specimen with Carnoy's solution best preserved visible striations, and fixation with formaldehyde after staining with 5% Neutral Red was also satisfactory. Casting with vinyl polysiloxane dental impression material greatly facilitated photo-documentation. Applying the technique to homicidal stabbings may help identify stab wounds produced with serrated blades.

    Original languageEnglish
    Pages (from-to)93-95
    Number of pages3
    JournalAmerican Journal of Forensic Medicine and Pathology
    Volume32
    Issue number1
    DOIs
    Publication statusPublished - Mar 2011

    Keywords

    • stab wounds
    • serrated knives
    • striations
    • skin

    Cite this

    Pounder, Derrick J. ; Bhatt, Shivani ; Cormack, Lesley ; Hunt, Bill A. C. / Tool Mark Striations in Pig Skin Produced by Stabs From a Serrated Blade. In: American Journal of Forensic Medicine and Pathology. 2011 ; Vol. 32, No. 1. pp. 93-95.
    @article{eccac23a34cd409dbc80e8cd6c1e03f5,
    title = "Tool Mark Striations in Pig Skin Produced by Stabs From a Serrated Blade",
    abstract = "Stab wounds produced by serrated blades are generally indistinguishable from stab wounds produced by nonserrated blades, except when visible tool mark striations are left on severed cartilage. Using a pig-skin experimental model, we explored the possibility that similar striations may be left in skin. Stabs into pig skin were made using a straight spine coarsely serrated blade (121), a drop point finely serrated blade (20), a clip point irregular coarsely serrated blade (20), a drop point coarsely serrated blade (15), and as controls 2 nonserrated blades (40). Tool mark striations could be seen on the skin wall of the stab canal in all stabs made using serrated blades but in none with nonserrated blades. The striation pattern, reflecting the class characteristics of the serrated blade, was the same as that described in cartilage but less well defined. Fixation of the specimen with Carnoy's solution best preserved visible striations, and fixation with formaldehyde after staining with 5{\%} Neutral Red was also satisfactory. Casting with vinyl polysiloxane dental impression material greatly facilitated photo-documentation. Applying the technique to homicidal stabbings may help identify stab wounds produced with serrated blades.",
    keywords = "stab wounds, serrated knives, striations, skin",
    author = "Pounder, {Derrick J.} and Shivani Bhatt and Lesley Cormack and Hunt, {Bill A. C.}",
    year = "2011",
    month = "3",
    doi = "10.1097/PAF.0b013e3181edf2fe",
    language = "English",
    volume = "32",
    pages = "93--95",
    journal = "American Journal of Forensic Medicine and Pathology",
    issn = "0195-7910",
    publisher = "Lippincott, Williams & Wilkins",
    number = "1",

    }

    Tool Mark Striations in Pig Skin Produced by Stabs From a Serrated Blade. / Pounder, Derrick J.; Bhatt, Shivani; Cormack, Lesley; Hunt, Bill A. C.

    In: American Journal of Forensic Medicine and Pathology, Vol. 32, No. 1, 03.2011, p. 93-95.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Tool Mark Striations in Pig Skin Produced by Stabs From a Serrated Blade

    AU - Pounder, Derrick J.

    AU - Bhatt, Shivani

    AU - Cormack, Lesley

    AU - Hunt, Bill A. C.

    PY - 2011/3

    Y1 - 2011/3

    N2 - Stab wounds produced by serrated blades are generally indistinguishable from stab wounds produced by nonserrated blades, except when visible tool mark striations are left on severed cartilage. Using a pig-skin experimental model, we explored the possibility that similar striations may be left in skin. Stabs into pig skin were made using a straight spine coarsely serrated blade (121), a drop point finely serrated blade (20), a clip point irregular coarsely serrated blade (20), a drop point coarsely serrated blade (15), and as controls 2 nonserrated blades (40). Tool mark striations could be seen on the skin wall of the stab canal in all stabs made using serrated blades but in none with nonserrated blades. The striation pattern, reflecting the class characteristics of the serrated blade, was the same as that described in cartilage but less well defined. Fixation of the specimen with Carnoy's solution best preserved visible striations, and fixation with formaldehyde after staining with 5% Neutral Red was also satisfactory. Casting with vinyl polysiloxane dental impression material greatly facilitated photo-documentation. Applying the technique to homicidal stabbings may help identify stab wounds produced with serrated blades.

    AB - Stab wounds produced by serrated blades are generally indistinguishable from stab wounds produced by nonserrated blades, except when visible tool mark striations are left on severed cartilage. Using a pig-skin experimental model, we explored the possibility that similar striations may be left in skin. Stabs into pig skin were made using a straight spine coarsely serrated blade (121), a drop point finely serrated blade (20), a clip point irregular coarsely serrated blade (20), a drop point coarsely serrated blade (15), and as controls 2 nonserrated blades (40). Tool mark striations could be seen on the skin wall of the stab canal in all stabs made using serrated blades but in none with nonserrated blades. The striation pattern, reflecting the class characteristics of the serrated blade, was the same as that described in cartilage but less well defined. Fixation of the specimen with Carnoy's solution best preserved visible striations, and fixation with formaldehyde after staining with 5% Neutral Red was also satisfactory. Casting with vinyl polysiloxane dental impression material greatly facilitated photo-documentation. Applying the technique to homicidal stabbings may help identify stab wounds produced with serrated blades.

    KW - stab wounds

    KW - serrated knives

    KW - striations

    KW - skin

    U2 - 10.1097/PAF.0b013e3181edf2fe

    DO - 10.1097/PAF.0b013e3181edf2fe

    M3 - Article

    VL - 32

    SP - 93

    EP - 95

    JO - American Journal of Forensic Medicine and Pathology

    JF - American Journal of Forensic Medicine and Pathology

    SN - 0195-7910

    IS - 1

    ER -