Institutional members access full text with Ovid®

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

Pounder, Derrick J. FRCPA; Bhatt, Shivani MB; Cormack, Lesley BMSc; Hunt, Bill A. C. FRCPath

American Journal of Forensic Medicine & Pathology: March 2011 - Volume 32 - Issue 1 - pp 93-95
doi: 10.1097/PAF.0b013e3181edf2fe
Original Articles

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.

From the Centre for Forensic and Legal Medicine, University of Dundee, Scotland, United Kingdom.

Manuscript received August 10, 2009; accepted September 18, 2009.

Correspondence: Derrick J. Pounder, FRCPA, Centre for Forensic and Legal Medicine, University of Dundee, Dundee DD1 4HN, Scotland, United Kingdom. E-mail: d.j.pounder@dundee.ac.uk.

© 2011 Lippincott Williams & Wilkins, Inc.