CRIM 355 Study Guide - Final Guide: Stippling, Chisel, Nuclear Dna

• School: Simon Fraser University
• Department: Criminology
• Course: CRIM 355
• Professor: Jodie- Ann Warren

Document Summary

Techniques of analysis chromatography, electrophoresis, spectrophotometry. Separates substance into components (so purifies them) Gas chromatography separates based on distribution between liquid and gas phase. Pyrolysis adds heat, e. g. paint chip-gas. Separates substances on basis of electrical potential. Different substances absorb light in different ways. Class evidence in order to have value must determine significance. May have high or low significance, if rare more significant. More than one type of class evidence. Cumulative the more there is the more significant multiplies probabilities. Characteristics of fibres colour, striations, cross-sectional shape, refractive index. Cars all have at least 4 layers normally. Chemist may attend and may be special fire investigators. Arson may be fir the sake of the fire, for insurance purposes, to disguise another crime. If found on control then maybe not used as an accelerant. Bombs explosive, timers, detonators, fuses, batteries, duct tape. Explosion - combustion with release of gases, which expand with the heat.