CRIM 356 Study Guide - Final Guide: Radiocarbon Dating, Post-Mortem Interval, Masseter Muscle

• School: Simon Fraser University
• Department: Criminology
• Course: CRIM 356
• Professor: Lynne Bell

Document Summary

Tissue depth (e. g. muscles can be molded onto clay) Scanned pictures, stock photos, uses anatomical and scanning. Co-ordinates to map shape of skull bones. 2d (facial composite over skull, features may be chosen from database: imposed onto picture) 3d: increased efficiency: methods either automated: focusing on anthropometrical data. 2001: match photo with reconstruction: 400/600 incorrect ids, only one reconstruction shown to be positive id, 3d facial reconstructions: 44% chose correct picture of individual. Works, but efficiency and usefulness can be debated supported empirically, trained individuals, data sets used. Good as a last resort, takes too much time, though computer reconstructions are faster: carbon 14 dating: forensic skeletal material, conceptual principles of carbon 14 dating. Cortical bone: (outside, hard, 8 year turnover) Trabecular (inside, spongy, 5-yr turnover): rapid remodelling. If bone formation happened during incline of curve before 1963, value of trabecular: greater than cortical. Pre 1963 bone formation: higher radiocarbon values in trabecular than cortical, reversed after.