Forensic Science Spring Review Part 2

Hair as Evidence Class or Individual evidence 1st determine if it is human medulla

Ballistics Can determine? Involves?

Entry vs Exit GSR-where and how far

Trajectory 2 reference points Shooters location

Forrest Fluff

Blood Spatter Possible to determine… 1st step in blood analysis

What can we Learn? 1. Distance from the blood source to the target 2. Direction of travel and impact angles 3. Nature of the force used to cause the bloodshed 4. The object used to cause the bloodshed 5. Sequencing of multiple bloodshed events 6.Interpretation of contact or transfer patterns

Blood Spatter Passive, Projected, Transferred

Angles and Patterns

Death and Decomposition Manner-homicide, natural, accidental, suicide Cause-heart attack, gun, strangle, drown Mechanism-loss of blood, air

Algor Livor Rigor Mortis Algor mortis -loss of 1 degree of temp/hour Livor mortis -color begins 2 hours after death, permanent at 8 hours Rigor mortis -stiffness begins 2 hours after death…head to toes about 12 hours, reverses in same order after 36 hours

How long: head and trunk? Head, trunk, legs ?legs only?

Factors that affect rigor mortis

5 stages of decomp Initial decay -bugs no smell Putrefaction-smell Black putrefaction-bad smell, flattening Butyric fermentation-moist Dry decay-hair and bones

How long? First step? How long?

You can be anything, choose wisely

Anthropology Growth plate Sutures S and L=30 C=50

Male vs Female

Height Any long bone Femur Tibia Fibula Humerous Radius ulna

Facial reconstruction

mDNA YES NO

Good Luck on Your Final Exams