FSC239Y5 Lecture Notes - Lecture 8: Leuco Dye, Methamphetamine, Crystal Violet
Document Summary
Imprint and impression evidence object comes in contact with another object or surface capable of recording a recognizable patterns. These contact markings can then be examined for the identification of class characteristics and the comparison of individualizing characteristics: class evidence:/characteristics: general, puts it into a certain group, individualizing evidence: special features/characteristics belonging to someone. Non yielding surface: imprint soft/yeilding (snow,mud): deformed surface: impression evidence (leaves class and individualizing characteristics(according to his weight, scratches etc) residue. Three dimensional imprints(impression imprints): soft medium. detailed pattern left. On a tripod, directly over at 90 degree to allow you to take natural size picture = 1:1 picture; which is very important to compare later: enhancements for latent. Localization of footwear impressions scene should be secured and evidense collected use proper techniques to locate document and recover footwear evidence full and partial impressions must be recovered. Why foot overlooked: lack of training, evidence is undervalued or not understood lack of sucess.
