Forensic Science and Technology Commons^™

A Qualitative And Quantitative Comparative Analysis Of Ballistic Bone Trauma From Frangible And Full Metal Jacket Projectiles, Hajar S. Hassan

Student Theses

Ballistic bone research is essential as 90% of homicides with the use of a firearm include injuries to bone. Forensic anthropologists use ballistic bone trauma to gather details and reconstruct an event, but ballistic bone trauma depends on many intrinsic and extrinsic factors. These factors include the type of bone, the type of firearm, and the type of ammunition. As new ammunition and firearms emerge, the literature on ballistic bone trauma remains limited. This novel study compares the bone trauma from the most common projectile, the full metal jacket, to a frangible projectile which is made to break upon impact. …

From Prairie To Practice: Forensic Taphonomy, Ethics, And Regional Ecology In Southeastern Nebraska, Jessica F. L. Gammage

Department of Anthropology: Theses and Student Research

Forensic taphonomy examines the postmortem processes that affect human remains within specific environmental contexts and plays a critical role in medicolegal death investigation. Despite significant advances in decomposition research, experimental studies remain geographically and environmentally uneven, limiting the transferability of postmortem interval (PMI) estimation methods across regions. The Central Great Plains are underrepresented in forensic taphonomic research despite its distinct ecological and geomorphological characteristics.

This thesis evaluates southeastern Nebraska as a specific regional setting for forensic taphonomic research by integrating ecological, pedological, and geomorphological data with current forensic literature. Tallgrass prairie vegetation, loess-derived soils, seasonal moisture variability, and dynamic fluvial …

Non-Destructive Automated Classification Of Human And Large Mammal Long Bone Fragments: A Deep Learning Approach Using Micro-Ct Histomorphology And Grad-Cam Interpretation, Kathleen Marie Kelley

Department of Anthropology: Theses and Student Research

This study explores the development and validation of an automated, deep learning system designed to differentiate human from large mammal long bone fragments using micro-CT imagery. A comprehensive dataset of cross-sectional µCT images was assembled from human and animal skeletal material processed at the DPAA, Nebraska. A convolutional neural network (CNN) based on a ResNet-18 architecture, utilizing transfer learning from ImageNet weights, was trained to classify µCT images as human or animal. The model achieved a mean classification accuracy of 89.85% (± 8.27%) across five sample-level cross-validation folds, with a sensitivity of 96.21% and a 95% bootstrap confidence interval of …

The Normalization Of Clandestine Graves In Mexico, Alejandra Vela

Themis: Research Journal of Justice Studies and Forensic Science

Clandestine graves are increasing at an alarming rate in Mexico, as cartels fight for dominance over the wealthiest territories. Those who fall victim to cartels are brutally tortured into submission or are murdered and disposed of. These graves are the preferred method of body disposal by the cartels. By disposing of various victims in hidden locations, the cartels seek to erase the existence of these individuals. Victims are reduced to only bone fragments and ash. Friends and family of those who have gone missing have created a large search organization, Madres Buscadoras, to combat the helplessness of authorities. Madres Buscadoras …

Analysis Of Skeletal Trauma: Examining Current And Potential, Maia Stevenson

D.U.Quark

Skeletal trauma is an important component of death investigations which is often discovered through postmortem computed tomography (PMCT) scanning. The analysis of skeletal trauma is a key process in the medicolegal field which could provide information on the cause and manner of death of the individual. Though PMCT provides useful imaging data for discovery, there is a lack of reliable technological tools for analyzation of such data. More definitive skeletal reconstruction tools and injury mechanism categorization tools would increase the efficiency of the post-mortem examination process. This review observes the current methods of discovering skeletal trauma through PMCT and surveys …

Application And Implications Of Radiocarbon Dating In Forensic Case Work: When Medico-Legal Significance Meets Archaeological Relevance, Benoit Bertrand, Thibault Clauzel, Pascale Richardin, Anne Bécart, Philippe Morbidelli, Valery Hédouin, Carina Marques

Anthropology Faculty Publications

The estimation of the postmortem interval for skeletal remains is a crucial aspect of forensic anthropology. This paper illustrates the importance of radiocarbon analysis for establishing medico-legal significance and supporting forensic identification, through the analysis of three case studies for which the years of both birth and death were investigated. In Audresselles, Northern France, a partial skull was discovered with no contextual information or identity. Radiocarbon dating yielded an average calibrated calendar age of 4232 BCE (92.5% probability), indicating significant archaeological value but no forensic relevance. In the second case, skeletal remains were found in the flooded underground of a …

The Limitations And Future Of Isotope Analysis In Forensic Anthropology, Kris Weller

Themis: Research Journal of Justice Studies and Forensic Science

This research paper will discuss the applications of isotope analysis in forensic anthropology, focusing on the limitations of this technique and its potential future uses. Isotope analysis is based on the principle that isotope ratios vary across geographic regions and that humans incorporate those unique isotope ratios into their bodies when they eat and drink. Forensic anthropology uses isotope analysis to determine a decedent’s approximate region of origin or residence. It is especially in cases where the remains are partially or highly decomposed, and when other avenues of investigation have been exhausted. In its current form, the applications of isotope …

How Gender Affirming Care Affects The Current Sex Estimation Standards In Forensic Anthropology: A Preliminary Study, Dakota Taylor

Department of Anthropology: Theses and Student Research

Current sex estimation standards in forensic anthropology are based on individuals whose gender matches their biological/osteological sex, also known as Cisgendered individuals. Recently, transgender individuals have started to become more common in the forensic context due to the increase in hate crimes and violence. This research builds upon past research done on how facial feminization surgery can affect both visual and metric methods, where it was found that forensic anthropologists should rely on the visual methods if they suspect someone to be transgender due to it being more accurate and being able to clearly state the scars left on the …

The Osteobiography Of Human Remains From The Seaview And Indian Town Trail Archaeological Sites, Maggie M. Klemm

Department of Anthropology: Theses and Student Research

Extensive site surveys and excavations on the Island of Barbuda led by Sophia Perdikaris have identified over 62 sites spanning from the Archaic time period to Historic times. Over the last 18 years, these multidisciplinary teams have focused on mapping all sites and performing rescue excavations on sites threatened by sea level rise, erosion or development. Two such sites are the Saladoid site of Seaview (BA016) and the Troumassoid site of Indian Town Trail (BA01). The dunes surrounding the site of Seaview receive the brunt of storms and hurricanes. In 1998 hurricane Georges exposed skeletal material now part of the …

A Manual For The Recovery Of Cbrne (Chemical, Biological, Radiological, Nuclear, And Explosive) Contaminated Human Remains, Patrick Barchett

Department of Anthropology: Theses and Student Research

Despite many international agreements and treaties prohibiting the use of CBRNE (Chemical, Biological, Radiological, Nuclear, and Explosive) weaponry, the proliferation of contaminated human remains displays the historic and continued use of inhumane war efforts. Due to the complications of recovery, contaminated human remains are often left unrecovered and unidentified. This thesis works to create a framework for the recovery of contaminated human remains for organizations with a focus on creating safe and sustainable working environments for those conducting the recovery. Much of this thesis assumes the remains are being recovered from interred mass graves. This thesis provides an introduction to …

Detecting Gsr Indicative Particles On Decayed Bones Using A Novel Field Kit, Sven Engling

Student Theses

Decomposed human remains are complex forensic puzzles, escalating in difficulty as the remains’ age obscures evidence, like trauma. Research has shown that scanning electron microscopes with energy dispersive X-ray spectrometers (SEM-EDX) are capable of detecting and identifying gunshot residue (GSR) particles on bones. However, SEM-EDX work is time consuming, expensive, and not accessible to every forensic department. Therefore, a preliminary field test capable of detecting GSR indicative particles, like lead, could save departments money and assist in trauma identification. This study examines the viability of using either the 3M Lead Check Test swabs or a sodium rhodizonate solution as part …

Oil And Canvas Art: Recovery And Analysis Of Unidentified Remains Recovered 2004, Dan Magelinski

Spectrum

No abstract provided.

Computed Tomography In Medicolegal Death Investigation: A Critical Review, Trenton Eames

University Honors Theses

The use of computed tomography (CT) scanning in medicolegal death investigations has increased in frequency in recent years. It can be used by investigators to help identify a victim, find a cause of death, or otherwise reveal legally relevant case details. This meta-analysis aimed to examine the research surrounding the use of CT scanning in medicolegal death investigation, focusing in particular on researchers’ scrutiny of the accuracy and precision of this technique within forensic contexts. Thirty-nine research papers were reviewed, with specific attributes and findings examined together in an effort to contextualize CT scanning in medicolegal death investigations. CT scanning …

Archaeology Or Crime Scene? Teeth Micro And Macro Structure Analysis As Dating Variable, Jessica A. Vincenty

Student Theses

Simple methods to aid in the determination of forensic or archaeologic relevancy of skeletonized remains have been researched since the 1950s. With advances in microscopic imaging techniques and machine learning computer data analysis methods the relevancy of decontextualized, comingled remains has room for improvement. This thesis is a study done to pioneer a new approach to analyzing dental skeletal remains to determine forensic relevancy.

Archaeological dental samples collected from the ancient city of Ur in modern day southern Iraq in addition to modern dental extractions were processed for scanning electron microscopy imaging. Archaeological and modern samples displayed different surface and …

Open-Source Tools For Dense Facial Tissue Depth Mapping (Ftdm) Of Computed Tomography Models, Terrie Simmons-Ehrhardt, Catyana Falsetti, Anthony B. Falsetti, Christopher J. Ehrhardt

Human Biology Open Access Pre-Prints

Computed tomography (CT) scans provide anthropologists with a resource to generate three- dimensional (3D) digital skeletal material to expand quantification methods and build more standardized reference collections. The ability to visualize and manipulate the bone and skin of the face simultaneously in a 3D digital environment introduces a new way for forensic facial approximation practitioners to access and study the face. Craniofacial relationships can be quantified with landmarks or with surface processing software that can quantify the geometric properties of the entire 3D facial surface. This paper describes tools for the generation of dense facial tissue depth maps (FTDMs) using …

A Forensic Investigation Into The Possible Origins Of Three Human Skeletons, Jefferson P. Sinnott

Forensic Science Theses

The Anthropology Department at Buffalo State has three human skeletons that have been part of the department’s collection for several years. The origin of the skeletons is currently unknown. Modern DNA techniques coupled with forensic anthropological techniques may now allow us to determine with some certainty the geographic origin of the skeletons. Ancestry, sex, age, and stature were assessed using current anthropological techniques. Afterwards, one tooth from each of the three skeletons was extracted, pulverized and DNA was isolated. Y-STR fragment size analysis of the DNA samples can provide information about the patrilineage of male individuals. Mitochondrial DNA sequencing analysis …

Multiple Stain Histology Of Skeletal Fractures: Healing And Microtaphonomy, John Wellington Powell

USF Tampa Graduate Theses and Dissertations

The forensic examination of wounds is one of the key elements of analysis performed by forensic anthropologists and forensic pathologists. Gross examination and histological analysis can be used to determine the timing of the wound and its cause. While forensic pathologists are trained to analyze hard and soft tissue wounds, forensic anthropologists, bioarchaeologists, and paleopathologists, focus on hard tissue. Forensic anthropologists have the added benefit of potentially working with residual soft tissue and would benefit from the incorporation of microscopy techniques that take advantage of the soft tissue to better understand perimortem events. Little research has been published that examines …