Social and Behavioral Sciences Commons^™

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

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

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

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

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

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

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

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

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

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

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 …

An Updated Look At Mental Health Services In American Public And Private Prisons, Lieren E. Tyira

Student Theses

People residing in American prisons have the legal right to mental health care while incarcerated (Justia, 2021). This is important, as the prevalence of mental disorders is high in this population (Prins, 2014), and incarceration is a psychologically damaging experience, which hinders a person’s success at rehabilitation. Numerous of issues related to the mental health services (MHSs) in both public and private prison facilities have been reported in recent years, which warrants systematic exploration. The little existing research comparing the presence of MHSs in these facilities has produced mixed results, it uses out-of-date datasets, and none has explored MHSs in …

Thematic Consistency Between Criminal History And Crime Scene Behaviors: Comparing Sexual Homicide Offenders With And Without Criminal Histories Of Sexual Offenses, Shannon E. Ettinger

Student Theses

Offender profiling research suggests that offenders may display behavioral consistency, meaning they may behave in some consistent manner between their crime scene actions and other aspects of their lives. Through behavioral themes, researchers can identify consistency in groups of individual behaviors that are thematically similar. Previous literature successfully applied the Expressive/Instrumental themes to homicide crime scene behaviors and criminal history. The current study aims to apply the Expressive/Instrumental thematic approach to analyzing the relationship between sexual homicide offender’s criminal history and their crime scene behaviors. The present study focuses on the distinction between sexual homicide offenders with a history of …

Pretrial Consequences: The Impact Of New York State Bail Reforms On Racial And Ethnic Disparities In Pretrial Outcomes, Esther Laaninen

Student Theses

This study investigates the impact of New York’s 2020 Bail Reforms on racial and ethnic disparities in pretrial outcomes for New York State. 2019, 2020, and 2021 arraignment data from the Office of Court Administration Pretrial Release Datasets are used to determine whether racial and ethnic disparities for White Non Hispanic, Black Non Hispanic, Hispanic, and other race defendants narrowed after the implementation of the new law. The results from descriptive analysis, binary logistic regressions, and ANOVA tests suggest that racial-ethnic disparities have not abated, even though the proportion of defendants required to pay cash bail has sharply declined among …

Prevalence Of Non-Self Dna On Three Different Sebaceous Skin Locations, Jan Kirstine Zamora

Student Theses

This project serves to provide additional information on the prevalence of non-self DNA on the exposed skin locations specifically the inner upper arm, the nape area of the neck and the neck area just below the ear, where current literature is lacking. Skin tape lifts from these locations were collected from 15 male participants and 13 female participants once a week over a period of three weeks. Only single source profiles were obtained from six volunteers. Eight volunteers had only one mixture DNA profile in nine samples, while mixture DNA profiles for at least two collection occasions were observed in …

Method Optimization For The Determination Of Cannabinoids In Blood By Liquid Chromatography Tandem Mass Spectrometry (Lc-Ms/Ms), Kevin D. Carrera

Student Theses

Delta-9-tetrahydrocannabinol (THC) continues to be one of the most popular drugs in the USA. Along with THC, other cannabinoids such as cannabidiol (CBD), are on the rise due to an increase in medicinal usage as well as the passage of different legislations removing these products from their current schedule I status. Thus, an urgency exists to develop robust and sensitive analytical methods to determine cannabinoids, especially THC, CBD and metabolites, in biological samples. The purpose of this study was to investigate different analytical procedures to determine the best method to identify and quantify CBD, THC and their metabolites in whole …

Seasonal Effects On The Arrival And Colonization Of Blow Flies (Diptera: Calliphoridae) On Carrion In New Jersey, Amanda A. Hernandez

Student Theses

Blow flies (Order: Diptera, Family: Calliphoridae) are a valuable forensic tool. Female blow flies will lay eggs (colonize) on remains often within minutes of death and entomological methods are based on their behavior and development to extrapolate postmortem intervals (PMI). External factors, such as temperature and weather patterns can influence timing of this behavior. This study seeks to gain a better understanding of the environmental factors that impact this behavior across two seasons. In this study, arrival and colonization behavior was investigated on rat carcasses from sunrise to sunset in a semi-rural region of New Jersey (n=64). Video recording software …

A Comparison Of Methods Used For The Elimination Of Organics From Soil Prior To Analysis By Ftir-Atr And Sem-Eds, Argeliz Pomales

Student Theses

This project suggests improvements to the treatment methods utilized for the sample preparation and evaluation of minerals in soil samples encountered in forensic science casework and research. The evaluation of pre-treated and post-treated soil samples were performed using Fourier-Transform Infrared Spectroscopy with Attenuated Total Reflection (FTIR-ATR) and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS). Because soil samples contain a significant amount of organic matter and water which interfere with examination of these minerals while using these instruments, pretreatment methods are necessary to isolate the mineral fraction for examination and analysis.

Soil samples were first sieved with various size stainless steel mesh …

The Interrelatedness Of Adversity, Gender, And Race/Ethnicity On Violent Juvenile Offending, Oona Newman

Student Theses

Previous research has found that adverse childhood experiences (ACEs) can affect delinquent behavior in various ways. This study aims to explore the associations between gender, race/ethnicity, violent offending, and adverse childhood experiences among a sample of justice-involved youth. 9,655 youth referred to the Florida Department of Juvenile Justice were given the Community Assessment Tool (CAT), a risk assessment that also reports adverse childhood experiences. Secondary data analysis was conducted using the information provided to test the expectations of the Childhood Trauma Model (CTM). The study finds associations between gender, race/ethnicity, violent offending, and adverse childhood experiences. Notably, ACEs had a …

Effects Of External Decontamination Of Methamphetamine In Juvenile Hair, Rebecca Mitrani

Student Theses

Methamphetamine is a common illicit substance abused in the United States. Hair is one matrix that is analyzed to determine the presence and concentration of methamphetamine. When hair is analyzed, an external decontamination step is commonly performed prior to drug extraction to avoid a potential positive result from environmental exposure in someone that has not ingested the drug themselves. In child-custody scenarios, however, it is important to know if a child is often around such illicit substances. This study serves to assess if there is a significant difference in methamphetamine concentrations in samples from children up to 12 years old …

Investigating The Mechanisms Driving Mercury Reduction And Emissions In Soil, Hamil Patel

Student Theses

The water-induced emission of mercury from soil has been studied, but a complete understanding of the mechanisms driving mercury reduction and emission in soil has not been reached. The current understanding is an immediate expulsion of soil gaseous mercury upon water treatment and an upward transport of dissolved soil ionic mercury as the water evaporates. We analyzed emissions from several types of samples using various methods to further our understanding on the mechanisms involved. Light-induced emissions from aqueous samples of humic acid (HA) spiked with mercury (II) chloride (HgCl₂) showed that at higher concentrations of HA, less mercury …

Elisa Validation Method For The Detection Of Ketamine In Hair, Daria A. Centonza

Student Theses

An ELISA method was developed and validated to detect ketamine in human hair samples. Ketamine is an anesthetic drug that causes memory loss, dissociative sensations, and hallucinations. Due to these adverse effects, ketamine is a common drug used in drug facilitated sexual assaults (DFSAs). It is very important to be able to detect the substances used in DFSAs over a longer period of time due to the delayed reporting of these crimes. Victims, often out of fear and from the sedative/memory loss effects of the drugs, tend to report these crimes when it is too late to use urine and …

The Influence Of Parole Case Characteristics And Construal Level On Parole Decisions And Perceived Humanness, Yi Sin Goh

Student Theses

Despite the low rate of discretionary parole release in New York, much is still unknown about the processes underpinning parole decisions. The present paper delves into how aggravating and mitigating parole case characteristics (e.g. institutional behavior) relate to parole decisions and the perceived humanness of parole applicants. The paper also examines how construal level can moderate the above relationships. Finally, a moderated mediation model outlining the pattern of these relationships is posited and tested. 122 New York residents were recruited online and randomly assigned to read either an abstractly or concretely construed transcript for an interview with a parole applicant. …

Exploring Criminal Thinking Patterns And Cognitions In High Risk Sexually And Non-Sexually Violent Offenders, Ruby L. Orth

Student Theses

The current understanding of shared offense supporting attitudes between different offender types is limited. This study compares criminal thinking styles and rape supportive attitudes between high-risk offenders who have engaged in either sexual or violent behavior. A sample of 237 incarcerated male high risk sexually violent and non-sexually violent offenders participated in a study where they completed a series of self-report questionnaires including the Psychological Inventory of Criminal Thinking Styles (PICTS) (Walters, 1995) and Bumby’s (1996) MOLEST and RAPE scales. Significant differences in criminal thinking between offender types was hypothesized. Significant overlap of rape supporting cognitive distortions, regardless of offender …

Deficiencies Within Guatemalan Criminal Justice Institutions When Detecting And Prosecuting Sextortion Crimes, Julia A. Bolotovsky

Student Theses

Sextortion is a form of corruption involving sexual exploitation, in which requests for monetary bribes are replaced by requests for sexual acts. Within Latin America, this crime is especially pertinent in Guatemala. Therefore, this study aims to identify which factors contribute to the occurrence of sextortion within Guatemala, while also analyzing the larger realm of violence against women. Based on semi-structured interviews with local experts and civil society activists, this study argues that sextortion is enabled by deficiencies within Guatemalan criminal justice institutions when detecting and prosecuting this crime. In order to effectively counter sextortion, more emphasis needs to be …

Increasing Gas Chromatography-Flame Ionization Detection Sensitivity For Carfentanyl Detection: An Examination Of Procaine At Different Concentrations And Split Ratios, Sonalia T. Balli

Student Theses

An opioid abuse crisis in recent years has contributed to many overdoses and overdose-related deaths in the United States. In 2017, fentanyl and fentanyl analogs contributed to more than half of NYC’s overdose deaths in 2017. Carfentanyl – an extremely dangerous fentanyl analogue 100 times more potent than fentanyl – is very difficult to detect in drug samples because it is typically present in concentrations lower than analytical instruments can detect at standard settings. In this work, I hypothesize that gas chromatography-flame ionization detection (GC-FID), when optimized for the detection of carfentanyl by adjusting the split ratio, is more sensitive …

Stigma Towards Offenders Diagnosed With Mental Illness, Christina N. Yocca

Student Theses

Mental health stigma is a key factor to what makes members of the community who are diagnosed with mental illness feel like outcasts to the “normal” population. This study investigated the relationship between right-winged beliefs and offenders diagnosed with mental illness. Sigma as it relates to mental health, offenders, and right-winged beliefs have been studied separately before, but there is a lack of information on the stigma that the public has towards offenders who struggle with their mental health and the possible predictors of stigma towards this group. Overall, this study aimed to further research in the intersectionality of stigmatized …

Evaluating A Test For Shedding Propensity Using Tape Lifts From Different Skin Locations, Xiao M. Chen

Student Theses

The shedding propensity of a person can assist data interpretation in casework when assessing the possibility of passive transfer for DNA analysis. Past studies on shedding propensity evaluated palmar skin (washed and unwashed) deposits. This study compared different skin locations with respect to shedding propensity, and explored the potential of tape-lifts as a skin surface collection method. Eight different skin types and samples were collected with adhesive tape disks from 28 participants over three non-consecutive days; the washed and unwashed fingers from both hands, toe, and arm, neck below ear, and nape. Samples were extracted, quantified, amplified, genotyped, and evaluated …

Reproducibility Of Individual Dna Deposits Detected Through Cellular Fluorescence, Natalee Small-Davidson

Student Theses

Contact traces are an important part of DNA casework, but the probative value of any identified associations depends on the possibility of passive transfer. There is known individual variation in DNA left behind during contact, this DNA shedding propensity has an effect on whose DNA is detected. This study evaluated this variability using a cell staining approach. Volunteers were asked to deposit a fingerprint on a clean glass slide, then wash their hands and deposit a second fingerprint after a 30-minute wait without touching anything. Three sets of samples were collected over three consecutive weeks. Fingerprints were stained with a …

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 …