Forensic Science and Technology Commons^™

Wound Ballistics With The Focus On Projectile Deformation, Nikita Khanov

D.U.Quark

Terminal ballistics, also called wound ballistics, is a field of ballistics that studies the projectile behaviour upon impact with a target. While the physical damage induced by the projectiles (typically bullets) and its medical treatment is well-researched, the deformation that the projectile itself undergoes is often underestimated in importance, and the research on this topic is lacking, although such changes can be a valuable source of forensic evidence. This review evaluates the deformation that occurs to non-fragmenting and various fragmenting bullets upon impact, as well as the effect that the body decomposition has on the bullets. The knowledge and understanding …

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 …

Global Crossroads Of Cybercrime: Youth, Enterprise And State Vulnerabilities In The Digital Age, Christopher S. Kayser, Kyung-Shick Choi

International Journal of Cybersecurity Intelligence & Cybercrime

No abstract provided.

Need Of Paradigm Shift In Cybersecurity Implementation For Small And Medium Enterprises (Smes), Shekhar Pawar, Hemant Palivela

International Journal of Cybersecurity Intelligence & Cybercrime

The increasing digitization of small and medium enterprises (SMEs) has significantly increased their attack surface, creating opportunities for various cyberthreats. In the global market, there are various cybersecurity standards and frameworks available, but there are still many cyber news stories from each corner of the world talking about increasing sophisticated cyber-attacks among organizations. According to recent studies, one out of five cyberattacks is targeting SMEs. Even though SMEs are relatively smaller as individuals, they are responsible for maximum contribution towards the betterment of the global economy, including the highest role in GDP and various employment opportunities. As compared to large …

Forensic Evidence And Its Effect On The Criminal Legal System, Kelsie L. Winter, April Terry

SACAD: Scholarly Activities

The use of forensic evidence is a relatively new initiative, gaining momentum and popularity in the 1980s and 1990s, for its role in addressing wrongful convictions. Yet, with advancements still being achieved, mistakes have been uncovered. In the criminal legal system, inaccurate evidence and/or information can be a barrier for seeking justice. Collectively, estimates suggest forensic errors occur in anywhere between 46-100% of forensic cases, with varying errors occurring based on the type of evidence (e.g., forensic pathology vs. seized drug analysis). As such, this literature review outlines the unreliable aspects of forensic evidence, the misinterpretation of such findings, and …

The Manipulation Of Odor Availability Of Training Aids Used In Detection Canine Training, Katylynn B. Sloan, Michele N. Maughan, Caitlin E. Sharpes, Robin R. Greubel, Shawna F. Gallegos, Aleksandr E. Miklos, Lindsay D. Waldrop

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Detection canines can identify numerous substances for which they have been trained. Historically, and a point of ongoing contention, detection canine threshold (i.e., sensitivity or limit of detection) training has primarily focused on changing the weight of the training aid substance used. There has been minimal focus on other principles, such as surface area, confinement, and temperature, which can be manipulated to affect odor availability. That said, trainers have been manipulating odor availability for years without necessarily understanding the governing scientific principles. The aim of this review is to highlight the principles that control odor availability of a substance and …

Military Forensic Archaeology: The Process And Recovery Of U.S. Missing-In-Action (Mia) Service Personnel, William Belcher, Luann Wandsnider, Ella N. Axelrod, Finn Kennison, Alicia Lawson

Department of Anthropology: Faculty Publications

The United States (U.S.) Department of Defense's (DoD) Defense POW/MIA Accounting Agency (DPAA) is the largest skeletal identification laboratory in the world and receives several hundred cases per year for identification related to Missing-in- Action (MIA) U.S. service members. While there are various sources for these accessions, by far the largest source is through unilateral or bilateral (done in cooperation with another governmental entity or nongovernmental organization) as well as public-private partnership excavations. While the DPAA-style military forensic archaeology follows archaeological principles and recording standards, the work is goal-oriented, evidence/trace-driven, and time-constrained— a common occurrence with cultural resource management sites …

Review Of Digging For The Disappeared: Forensic Science After Atrocity, Abigail Vaughn

Nebraska Anthropologist

Since the field's development, individuals and communities involved in and affected by international forensic investigations have been confronted with many political and ethical dilemmas. The book, Digging for the Disappeared: Forensic Science After Atrocity (2015), by Adam Rosenblatt, attempts to identify and articulate the various debates surrounding humanitarian forensic work. In doing so, the author focuses on four key areas; the purpose of such investigations, the stakeholders and expectations involved, and what may realistically be accomplished. While sympathetic to the perspective of forensic practitioners, Rosenblatt presents the positions of all parties in an unbiased manner, introducing the reader to …

Program And Proceedings: Nebraska Academy Of Sciences 1880–2025, 145th Anniversary Year, One Hundred-Thirty-Fifth Annual Meeting

Nebraska Academy of Sciences: Programs and Proceedings

Program

Aeronautics and Space Science

Biological and Medical Sciences

Biology

Chemistry

Earth Sciences

Science Education

Anthropology

Applied Science and Technology

Physics and Engineering

Forensic Sciences

Ecology, Sustainability, and Environmental Science

Maiben Lecture: Mary Ann Vinton, "State of the Academy"

Friends of Science Awards: David Crouse and Daniel Sitzman

Assessment Of Analytical Workflows Of Gunshot Residue Evidence And Strategies For Implementation Of Advanced Technology In Crime Laboratories., Leah D. Thomas

Graduate Theses, Dissertations, and Problem Reports (ETD)

The rise in gun violence in the United States has increased the demand on forensic agencies to process evidence promptly and accurately. The exchange of imperceptible traces among objects, suspects, and victims can provide critical insights into the interactions and sequence of events during a crime. Gunshot residue (GSR) is a type of trace evidence that holds significant investigative value in shooting reconstructions. GSR can help identify potential shooters, intermediate targets, and bullet trajectories; however, its analysis is often expensive and time-consuming. Consequently, there is an urgent need for more effective solutions.

Methods for on-site screening can significantly streamline forensic …

The Role And Impact Of Forensic Evidence In The Prosecution Of Homicide Cases In The U.S., Afrah Dakhilallah A. Altubait

Theses and Dissertations

The role of forensic evidence in the criminal justice process is an important topic that is significant from both theoretical and practical perspectives. The present study is dedicated to a critical analysis of the role of this evidence in the U.S. criminal justice process with a focus on its significance in homicide cases. Specifically, this dissertation examines the implications of using DNA and fingerprint evidence for convictions in U.S. homicide cases by analyzing the role of DNA and fingerprint evidence in the prosecution of “hot” and “cold” homicide cases, discussing the main ways in which forensic evidence assists with prosecuting …

A New Deepfake Detection Method With No-Reference Image Quality Assessment To Resist Image Degradation, Jiajun Jiang, Wen-Chao Yang, Chung-Hao Chen, Timothy Young

Electrical & Computer Engineering Faculty Publications

Deepfake technology, which utilizes advanced AI models such as Generative Adversarial Networks (GANs), has led to the proliferation of highly convincing manipulated media, posing significant challenges for detection. Existing detection methods often struggle with the low-quality or compressed press, which is prevalent on social media platforms. This paper proposes a novel Deepfake detection framework that leverages No-Reference Image Quality Assessment (NRIQA) techniques, specifically, BRISQUE, NIQE, and PIQUE, to extract quality-related features from facial images. These features are then classified using a Support Vector Machine (SVM) with various kernel functions. We evaluate our method under both intra-dataset and cross-dataset settings. For …

Aviation Guilt: The Role Of Human Factors In Airline Incidents, Alexander Silva

Williams Honors College, Honors Research Projects

Human factors play a central role in aviation safety, influencing entire processes in an aviation environment. This paper reviews human factors in aviation as a whole to create a picture of what causes many aviation accidents. Models such as the SHEL model, Swiss Cheese Model, and Wickens MRT will be introduced to illuminate both the ways in which a flight deck should operate and why certain decisions are made in critical situations. Some of the deadliest aviation accidents have resulted from human error, such as the Tenerife airport disaster and AF447. These disasters were seminal in the development and execution …

Advancing Forensic Firearm Analysis: Quantitative Measurement Of Pellet Patterns Using Open Source Software, Inez Staples

Master of Science in Forensic Science Directed Research Projects

Shotgun pellet pattern analysis plays a critical role in forensic firearm investigations, particularly for estimating muzzle-to-target distances. However, conventional methods based on pattern diameter become unreliable when only partial patterns are recovered, as is often the case in forensic scenarios involving soft tissue or incomplete impact surfaces. This study aimed to validate ImageJ, an open-source image analysis software, as a standardized, accurate, and reproducible tool for measuring pellet-to-pellet distances in partial shotgun patterns. The methodology included calibration of ImageJ using a perforated poly board, comparison of manual versus digital measurements on 17 pre-made pellet patterns, and development of a calibration …

Biodistribution And Method Validation Of Xylazine In A Mouse Model Using Liquid-Chromatography-Quadrupole-Time Of Flight Mass Spectrometry, Julia E. Perschbacher

Master of Science in Forensic Science Directed Research Projects

Xylazine is a nonopioid veterinary sedative and an α2 adrenergic receptor agonist. It emerged in the opioid epidemic as an adulterant of illicit fentanyl. As xylazine becomes more involved in fatal overdoses, it is relevant to elucidate its biodistribution post-exposure due to its exacerbation of adverse events, namely respiratory depression, as xylazine’s contributions to existing adverse effects of synthetic opioids is understudied. A bioanalytical method to quantify xylazine and select metabolites in tissue using LC-QToF was validated and applied to a preclinical mouse model in order to characterize xylazine’s biodistribution in whole blood and six tissues at a dose known …

Impact Of Substrates And Deposition Time On Bacteria Associated With Saliva Samples And Its Implication On A Bacterial Signature-Based Body Fluid Identification Method, Olisdey Galano Cruz

Master of Science in Forensic Science Directed Research Projects

Traditional serological methods for body fluid detection are limited by poor specificity and sensitivity, lacking confirmatory capability and thereby increasing the risk of false positives that may compromise the integrity of forensic investigations. While molecular methods such as mRNA, miRNA, and DNA methylation offer improved specificity, they are often hindered by marker instability and operational complexity in routine forensic workflows. Bacterial signature profiling has emerged as a promising alternative, offering enhanced stability, abundance, and compatibility with existing DNA workflows. However, its forensic implementation requires further validation. This study evaluated the effects of substrate type and storage time on the salivary …

Qualitative Method Validation Of Acid/Neutral Drugs Carisoprodol, Meprobamate, And Naproxen Using Liquid Chromatography-Tandem Mass Spectrometry, Kate O. Martin

Master of Science in Forensic Science Directed Research Projects

Meprobamate, carisoprodol, and naproxen are acidic/neutral drugs widely prescribed for muscle relaxation and inflammatory conditions, with frequent detection in forensic toxicology casework due to extensive clinical use. A method to qualitatively evaluate these compounds was developed to unify acid/neutral drug screening. This study incorporated blank blood, antemortem blood, postmortem blood, urine, and liver homogenate as representative biological matrices. Method validation was conducted in accordance with ANSI/ASB Standard 036 for Forensic Toxicology, encompassing key parameters including limit of detection (LOD), endogenous interferences, potential interferences, carryover, processed sample stability, and ionization suppression/enhancement. The validation was performed using the internal standards carisoprodol-D7, meprobamate-D7, …

Novel Time-Since-Deposition Signatures For Canine Blood; Implications For Animal Cruelty Investigations, Alysia M. Townsley

Master of Science in Forensic Science Directed Research Projects

Dogfighting is a felony in all 50 states and is often tied to other organized crime activities including gambling, narcotics, and weapons trafficking. Because of the clandestine nature of dogfighting crimes, it may be necessary to determine the age of blood samples from suspected events, not just the source. In this study, flow cytometry was used to identify cellular autofluorescence signatures for estimating TSD (time-since-deposition) in canine blood deposits up to 6 months old. To accomplish this, blood was taken from canines of various chronological ages and breeds, then deposited to create TSD samples ranging between 1 day and 180 …

Development Of Novel Signatures For Determination Of Cell Types In Blood And Saliva Mixtures, Caitlin Lydon

Master of Science in Forensic Science Directed Research Projects

Determination of tissue source and the time at which a biological material is transferred from its source to another surface, known as the time-since-deposition (TSD), would assist forensic analysts by providing crucial context for DNA profiles generated from biological evidence. Many methods for cell identification have been explored using biomolecule markers such as mRNA, miRNA, and differential DNA methylation. Forensic laboratories have also developed methods for TSD estimation that focus on degradation of biomolecules. Biomolecules such as mRNA or miRNA degrade at different rates due to some being more stable than others. The ratio of stable degrading biomolecules, therefore, can …

Accurate Body Weight Class Prediction From Mirna And Gene Expression In Blood And Saliva Samples, Kimberly Lettner

Master of Science in Forensic Science Directed Research Projects

miRNA interference on protein abundance related to glucose uptake and lipid production has been evaluated in biomedical research and linked to metabolic disorders like severe obesity. The direct regulation of protein abundance caused by miRNAs on a person’s metabolism can lead to an increased weight and overall size. Body size, measured by BMI, provides additional physical descriptions that can be combined with hair color, eye color, age, and skin pigment to aid investigations of unidentified remains or unknown suspects not found in a database. The purpose of this project was to evaluate the miRNA expression of target biomarkers in dried …