CHY 183 Lecture Notes - Lecture 4: Forensic Science, Blood Residue, The Features
22 Oct 2017
School
Department
Course
Professor
Document Summary
What bpa can determine: date and time of crime, type and velocity of weapon, movements/position of those involved. If the assailant was left or right handed: types of injuries dealt, whether death was immediate. Effects of surface texture: surface texture and the stain"s shape, size and location must be considered when determining a bloodstain"s direction, dropping distance, and angle of impact, surface texture is of paramount importance. In general, the harder and less porous the surface, the less results: a) is blood drop on glass surface form 24 in, b) is blood drop on cotton muslin sheet from 24 in. Directionality and angle of impact: the direction or travel of blood striking an object may be discerned because the pointed. Aayushi nema end of a bloodstain always faces its direction of travel: the impact angle of blood on a flat surface can be determined by measuring the degree of circular distortion.
