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Recreating Death’s Half Acre:Forensic Science and Tech Farm
Dr. David K. MillsLouisiana Tech University
Forensic Science at Louisiana Tech University
• A Brief History
• Coursework
• Research Activities
• Future Directions
Forensic Science
What is it?
Components-Applied Science
Basic Science
Legal/Courts & Testimony
Facilities
Scope of Forensic Science
Criminalistics
Specialities
Medicine
Anthropology
Odontology
Entomology
Others
History of Forensic Science
Chinese medicine-6th Century
1839-MJB Orfila, toxicology
Late 1800s-Alexandre Lacassagne, ballistics and bloodstain patterns
1910-Edmund Locard, exchange principle
1924-August Vollmer, LAPD crime lab
1932-FBI Laboratory, fingerprints
Forensic Science is NOT
Forensic Science is
• CS Investigators• Physical Evidence• Forensic Science• Forensic
Taphonomy• Forensic
Archeology
Forensic Anthropology at Louisiana Tech University
Integrating Field Investigations with Laboratory Analysis
Coursework in Forensic Science
• Forensic Anthropology
• Biological Anthropology
• Research in Forensic Anthropology
• Readings in Forensic Science
• Readings in Bioanthropology
Human Osteology Lab
• Intense instruction in human osteobiology
• Methods used in human identification
Objectives
AgingSexingPopulation AffinityDietPathologyTrauma
Investigative Field Techniques
• Simulated Crime Scenes
• Pics as model corpses
• Forensic Taphonomy
• Forensic Archeology
• Moot Court
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Crime Scene Excavation
• Site survey and discovery• Crime scene preservation• Site formation processes• Site excavation
• Forensic archeological methods • Importance of context and the chain of evidence• The art of archeology
Recovery and Analysis
• Recovery of material artifacts• Data recording• Forensic photography
• Preservation of skeletal remains• Preliminary field analysis• Curation and transport
Investigative Field TechniquesForensic Archeology
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Laboratory Analysis and Reconstruction
Mock Inquest
Mock Inquest
• Each forensic team submits a written forensic case report.
• Students portray expert witnesses and defend their conclusions.
• Afterwards, crime scenario is presented and compared to forensic team findings.
Model Human Corpse
• Hormel pygmy pig is used as a model human corpse
• Document arthropod succession is used to determine post-mortem death interval
• Patterns of decomposition and disarticulation are documented
• The model corpse is used for other research purposes (e.g. studies in taphonomy)
Forensic Entomology
• Model corpse is placed in secured cage surrounded by dead fall traps
• Sampling will begin when first blow fly lands
• Students prepare experimental area in environment A
• Two entomology groups sample, monitor and analyze arthropod and tissue samples
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• Traps are sampled at set times in morning and afternoon.
• Temperature, rainfall and other climatic variables are measured.
• Arthropods are sorted and counted.
• Arthropod taxonomy is identified, and succession is determined.
• Tissues are fixed and processed for paraffin embedding and stained.
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Research Activities inForensic Taphonomy
• Bioturbation• Cut mark analysis• Differentiating bone trauma from geofact• Cell and tissue decay• Site formation processes• Chlorophyll concentration as PMI indicator• Hydraulic transport and differential preservation
Image Analysis and Forensic Anthropology
Bone Modification