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Articles 1 - 11 of 11
Full-Text Articles in Social and Behavioral Sciences
Method Development And Validation Of Controlled Substances On A Gas Chromatography - Fourier Transform Infrared Spectrophotometer, Regina E. Filus
Method Development And Validation Of Controlled Substances On A Gas Chromatography - Fourier Transform Infrared Spectrophotometer, Regina E. Filus
Student Theses
The goal of this project was to perform a validation and a method development for an Agilent 7890 Gas Chromatograph connected to a Thermo iS50 Fourier Transform Infrared Spectrophotometer in order to put the instrument into functional and operational use. Both instruments are connected via an interface allowing for simultaneous analysis of a sample. A custom-made in-house library was created in order to search and compare to future unknown case samples. Reference materials were run and reviewed in order to determine which method and concentrations would provide the best infrared scans, and the sample repeatability runs were used to develop …
The Effect Of Resource Quality And Species Interactions On Dermestes Maculatus, Sarah Aliahmad
The Effect Of Resource Quality And Species Interactions On Dermestes Maculatus, Sarah Aliahmad
Student Theses
Forensic entomology is the use and application of insect information in legal matters, particularly in death investigations as insects utilize decomposing remains as a food source to complete their life cycle. Dermestes maculatus (DeGeer), larder beetles belonging to the family Dermestidae, are of considerable forensic importance since their larvae are typically found on human corpses during the later stages of decomposition – the advanced and dry/skeletal stages. Dermestes maculatus can be useful in estimating the post-mortem interval (PMI) of a cadaver with advanced decomposition. The purpose of this study was to investigate the colonization (egg-laying) behavior of D. maculatus; …
Open Fire: The Expansion Of 9mm Hollow Point Bullets In Relation To Tissue Thickness, Abigail Wilson
Open Fire: The Expansion Of 9mm Hollow Point Bullets In Relation To Tissue Thickness, Abigail Wilson
Student Theses
Bullets can be broadly differentiated into jacketed and unjacketed groups. Jacketed ammunition can be further broken down based on the bullet’s design, one of which is hollow points. This research examines a representative brand of jacketed hollow point bullets used in a common caliber cartridge, the 9mm Luger. A jacketed hollow point bullet is designed to expand when it encounters a viscous medium such as tissue. This experiment simulated tissue using ballistic gelatin and simulated skin using a chamois overlay. As a positive and negative control, a series of bullets were fired into a full-size block of gelatin to achieve …
Identification Of Different Hair Dyes In Dyed Hair Using Attenuated Total Reflectance (Atr Ft-Ir), Surface Enhancing Raman Spectroscopy (Sers) Techniques, Nicholas Lovera
Identification Of Different Hair Dyes In Dyed Hair Using Attenuated Total Reflectance (Atr Ft-Ir), Surface Enhancing Raman Spectroscopy (Sers) Techniques, Nicholas Lovera
Student Theses
This investigation compares the ability of Attenuated Total Reflection Fourier Transfer Infrared Spectroscopy (ATR FT-IR) and Surface Enhance Raman Spectroscopy (SERS) to identify and differentiate different hair dye brands on dyed hair samples. Hair is a common type of trace evidence found at crime scenes and can provide numerous information through forensic hair analysis. Cosmetic hair treatment such as dying the hair different colors has grown and became popular, thus it can be a very common type of trace evidence. This study can provide a forensic scientist an additional method for analyzing dyed hair samples. The goal was to compare …
Dna Shedding Propensity And Individual Characteristics, Genesis Echavarria
Dna Shedding Propensity And Individual Characteristics, Genesis Echavarria
Student Theses
This study attempted to correlate individual biological characteristics to the amount of DNA recovered from a person’s hands (representative of shedding propensity). We used adhesive D-Squame tape to collect DNA from the fingers of more than 100 volunteers with and without controlled activity after handwashing. Two no-activity samples were taken after 30 min from the non-dominant hand and two samples from the dominant hand were collected after 60 min of controlled activity. Involuntary touches during the 60-min activity period were counted. All samples were extracted for DNA, quantitated, and genotyped to detect mixtures. Skin measurements for hydration, sebum, and melanin …
The Relationship Between Sexting Behaviors And Image-Based Sexual Abuse (Ibsa): Does Sexting Predict Ibsa?, Seunghye Yang
The Relationship Between Sexting Behaviors And Image-Based Sexual Abuse (Ibsa): Does Sexting Predict Ibsa?, Seunghye Yang
Student Theses
With development of technology, Image-Based Sexual Abuse (IBSA), a new type of sexual abuse, has emerged. It is defined as nonconsensually creating nude or sexual images of others; nonconsensually distributing nude or sexual images of others; and threatening to distribute nude or sexual images of others (Henry & Flynn, 2019; Powell et al., 2019). As this is a relatively new phenomenon, risk factors for IBSA are not yet well understood. It has been suggested that sexting may be a risk factor for IBSA as the two behaviors share some common characteristics. For example, both sexting and IBSA involve sending or …
Attorneys’ Questions About Time In Criminal Cases Of Alleged Child Sexual Abuse, Mckenna N. Cameron
Attorneys’ Questions About Time In Criminal Cases Of Alleged Child Sexual Abuse, Mckenna N. Cameron
Student Theses
In cases of alleged child sexual abuse, information about the timing of events is often needed to establish a timeline, determine specific charges, or establish witness credibility (Lyon et al., 2017). However, past developmental laboratory research has demonstrated that children struggle to provide accurate and reliable testimony about time, and there is currently a lack of field research examining how attorneys actually question child witnesses about time in court (Friedman, 1991; Wandrey et al., 2012). The current study analyzed 73 trial transcripts from cases of alleged child maltreatment containing a child witness between the ages of 5 to 17 years …
Extraction Of Challenging Forensic Samples Using The Microgem Dna Extraction Kit, Falyn R. Vega
Extraction Of Challenging Forensic Samples Using The Microgem Dna Extraction Kit, Falyn R. Vega
Student Theses
In forensic science, DNA extraction can be a tedious and resource-intensive process. Extraction with Proteinase K is an industry standard but has its drawbacks, such as requiring multiple ionic detergents and washing steps. MicroGEM has developed a new enzyme called forensicGEM that is temperature-dependent and compatible with mesophilic enzymes, offering complete DNA extraction in about 20 minutes in a single tube, limiting contamination, loss of sample, and working time. ForensicGEM can extract DNA from highly degraded samples, potentially leading to more complete STR profiles. Highly degraded tissue and bone samples were collected and extracted with the forensicGEM …
Public Perceptions And Punishment Of Sex Offenders, Emily R. Ives
Public Perceptions And Punishment Of Sex Offenders, Emily R. Ives
Student Theses
Previous research has examined negative public perceptions and attitudes towards sex offenders and, in turn, how sex offenders are punished. The present study aims to build on previous research by examining whether perceptions of sex offenders are impacted by the offender’s relationship to the victim, and how victim perpetrator relationship may impact sentencing. Survey data from n=119 participants was examined. Participants were randomly assigned to one of three relationship conditions (i.e., stranger, acquaintance, or spouse) which was manipulated within a mock article vignette describing a rape incident. Subsequently, participants completed questionaries regarding sentencing of the described perpetrator, as well …
The Association Between Mental Health Diagnoses And Trial Competency Assessments In Defendants: A Meta-Analysis, Danielle C. Severe
The Association Between Mental Health Diagnoses And Trial Competency Assessments In Defendants: A Meta-Analysis, Danielle C. Severe
Student Theses
In the realm of trial competency evaluations, there are a variety of methods used to evaluate whether an individual is fit to stand trial. Presently, forensic psychologists conduct trial competency evaluations in order to assess one’s ability to stand trial, but for persons with a mental health diagnosis, the generic competency measures are not the most effective means to assess one’s ability to stand trial, as mental health diagnoses impair cognitive functions that are required in judicial proceedings. Forensic psychologists have opted to utilize other assessment methods such as the MacArthur Competence Assessment Tool – Criminal Adjudication [MacCAT-CA] and Fitness …
The Effect Of Henna And Bleach Treatments On Cocaine Hair External Contamination, Alexandra Dombroski
The Effect Of Henna And Bleach Treatments On Cocaine Hair External Contamination, Alexandra Dombroski
Student Theses
Hair external contamination is a challenging phenomenon that may compromise hair testing interpretation. Previous research has found that cosmetic hair treatments can decrease concentrations of drugs that are already present in the hair shaft, however little is known about the impact of these treatments on the hair when the drugs are deposited externally. The aims of the present study were to explore how henna and bleach treatments influence cocaine external contamination. Sixteen authentic hair samples were collected from volunteers with varying hair colors and shapes and were confirmed negative for cocaine and benzoylecgonine by a fully validated LC-MS/MS method. Each …