Unusual Puncture Marks on Poly Vinyl Tubing

Abstract

The case study involves the examination of puncture marks on a polyvinyl (PV) tubing of an industry pipelining wherein sabotage had occurred. The study carried out to individualize the characteristic and sub-class characteristic marks formed by the tool implemented and their unusual features formed are attempted. The paper also brings out differences in the characteristics of puncture marks on PV tubing resulting from the three knives/tools submitted by the investigating officer and the linking of one of the knives to the questioned tool marks on the tubing.