[FSC239Y5] - Final Exam Guide - Ultimate 119 pages long Study Guide!
Document Summary
January 5, 2016: hair and fiber evidence http://oneclass. com/#!/notes/university-of-toronto-utm-/forensic-science/fsc239y5/71231/full-year- lectures-for-fsc239. The microscopic debris that covers our bodies are the mute witnesses sure and faithful, of all our movements and all our encounters. Fibers and hairs can be transferred between individuals, between individuals, and objects or between objects. 80% of hairs and fibers are lost in the first four hours from contact/transfer. Factors affecting rate of loss: type of donor, length of hair/fiber, environmental conditions, handling/cleaning. Efficient collection of evidential extraneous hairs and fibers. Prevention of contamination between items or environment. Proper storage of evidence for later use. Methods: taping, picking by eye or under a stereomicroscope. Case items are segregated into groups which originate from a common source. A sequence is chosen for taping items from different sources so that potential contamination is minimized. Items from different sources are taped in different hair and fiber taping rooms by qualified personnel.
