Exam 2 Flashcards
(46 cards)
bloodstain pattern analysis
determines direction, angle of impact, victim’s position & movement, attacker’s position, and number of blows
bloodstain surface texture
hard & nonporous surfaces produce less spatter and vice versa
angle of impact
calculated using width/length ratio and inverse sine function
impact spatter
forward and back spatter from force applied to blood
gunshot spatter
fine forward spatter from exit wounds and back spatter from entry
castoff spatter
blood flung from a moving object
arterial spray
bright red blood spurts from an artery
expiated blood
blood expelled from mouth or nose
void pattern
absence of blood due to a blocking object
grid method
a grid of known dimensions is placed over the blood pattern
perimeter ruler method
a rectangular border of rulers around a pattern
external autopsy examination
body overview, clothing examination, injury classification
internal autopsy examination
Y shaped incision, organ removal, toxicology tests
blunt force trauma
bruising & abrasions from non-sharp objects
sharp force trauma
incised wounds from knives or blades
asphyxia
lack of oxygen
gunshot wound
entry & exit wounds and range of fire analysis
substance abuse
toxicological examination for drugs & poisons
manners of death
natural, undetermined, suicide, accidental, homicide
algor mortis
body cools 1-1.5 degrees per hour
livor mortis
blood settles 20-180 min post mortem
rigor mortis
stiffening of muscles within 24 hours, disappears by 35
vitreous humor potassium levels
in the eyes
stomach contents
extent of digestion
