Impression Evidence Essay Example | Topics and Well Written Essays - 750 words

Impression Evidence - Essay Example It includes fingerprints, footwear impressions, tire impressions, bite marks, firearms and tool marks. Bare foot impression, tire impression and footwear impression evidences are very little used forms of evidence and often overlooked. This is basically due to lack of an aggressive attitude for the detection and recovery of this evidence. Impression evidence differs according to the surface on which impression are put down. The differences can make collection, presentation, identification and analysis of impression evidence difficult. Generally, impression evidence is produced when object or stamped or pressed against one another, which allow the object to retain and transfer characteristic from one another. It can be divided in to two categories. i.e. two dimensional and three-dimensional. While the former has measurement of the width and length, the latter has three measurements; length, depth and width. Finger print impression is an impression of the friction ridges of any or all parts of the finger. Friction ridges are â€Å"the hairless parts of the body--the inner surfaces of the hands and the soles of the feet--are covered with patterns formed by raised ridges of skin known as friction or papillary ridges.† (Hunter, Ian). Finger print identification is also called dactyloscopy. It is the process of analyzing questioned and non friction skin ridge impression from palms, fingers and toes to determine whether the impressions are from the same finger, toe or palm. (Ashbaugh, David R. (1991). Vol . 41). No two finger or palm prints are identical due to the flexibility of friction ridge. Finger print identification finds out whether two friction ridge impressions are originated from the same finger or palm or toe or sole or not. Latent print is the accidental impression left by friction ridge skin on a surface. Chemical, Electronics and physical processing methods allow