Examination of Toolmarks from Sequentially Manufactured Tongue and Groove Pliers

Volume 25, Issue 4 (October 1980)

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ISSN: 0022-1198
CODEN: JFSCA
Published Online: 1 October 1980
Page Count: 14

Examination of Toolmarks from Sequentially Manufactured Tongue-and-Groove Pliers
Cassidy, FH
Criminalist, Santa Barbara Regional Laboratory, Calif.

(Received 22 January 1980; accepted 11 April 1980)

Abstract

Tongue-and-groove pliers are often used in burglaries to twist off doorknobs (to gain entrance) and it was deemed necessary to determine if new, sequentially manufactured pliers would each produce similar toolmarks that would be indistinguishable. Evaluation of the toolmarks from three sets of sequentially broached Craftsman^® pliers, together with an analysis of the manufacturing processes, verified that individual and not repetitive structural characteristics are generated.

Keywords:
criminalistics, toolmarks, pliers, class characteristics, individual characteristics, manufacturing processes, nodules, repetitive structural details, broaching, striations

Paper ID: JFS11294J
DOI: 10.1520/JFS11294J
ASTM International is a member of CrossRef.

Author Title Examination of Toolmarks from Sequentially Manufactured Tongue-and-Groove Pliers Symposium , 0000-00-00 Committee E30

		SEDL / Journals / Journal of Forensic Sciences (JOFS) / Citation Page Volume 25, Issue 4 (October 1980) Click here to download this paper now for $25 PDF (1.1M) View License Agreement ISSN: 0022-1198 CODEN: JFSCA Published Online: 1 October 1980 Page Count: 14 Examination of Toolmarks from Sequentially Manufactured Tongue-and-Groove Pliers Cassidy, FH Criminalist, Santa Barbara Regional Laboratory, Calif. (Received 22 January 1980; accepted 11 April 1980) Abstract Tongue-and-groove pliers are often used in burglaries to twist off doorknobs (to gain entrance) and it was deemed necessary to determine if new, sequentially manufactured pliers would each produce similar toolmarks that would be indistinguishable. Evaluation of the toolmarks from three sets of sequentially broached Craftsman^® pliers, together with an analysis of the manufacturing processes, verified that individual and not repetitive structural characteristics are generated. Keywords: criminalistics, toolmarks, pliers, class characteristics, individual characteristics, manufacturing processes, nodules, repetitive structural details, broaching, striations Paper ID: JFS11294J DOI: 10.1520/JFS11294J ASTM International is a member of CrossRef. Author Title Examination of Toolmarks from Sequentially Manufactured Tongue-and-Groove Pliers Symposium , 0000-00-00 Committee E30