Development of STR profiles from firearms and fired cartridge cases

Fired cartridge cases are a common type of evidence found at crime scenes. However, due to the high chamber temperatures and touch nature of this evidence, DNA testing is not commonly sought because it is believed DNA is only present in low levels, whether it is due to initial low levels of DNA and/or DNA degradation from the heat or inhibition of the PCR reaction. Moreover, very few laboratories report STR typing success with fired cases. This study focused on obtaining STR profiles from fired cartridge cases using the AmpFℓSTR^® MiniFiler™ kit, which is designed to amplify DNA from low level, inhibited, and degraded samples. Comparisons to other STR amplification kits were also conducted. In attempt to simulate casework, random individuals loaded cartridges into a firearm. DNA was recovered from the fired cartridge cases using the double swab technique and extracted using an automated large volume DNA IQ™ method. Initially, testing focused on known shedders handling cartridges for 30 s prior to firing. A significantly greater number of alleles was obtained following amplification with the MiniFiler™ kit versus the PowerPlex^® 16 BIO kit. No alleles were observed using the Identifiler^® kit. In an attempt to better simulate casework, a random selection of laboratory personnel handled shotshells for as long as needed to load and fire the weapon. In this mock sample study, the MiniFiler™ kit successfully amplified an average of 22% of expected alleles from DNA recovered from shotshell cases versus the PowerPlex^® 16 BIO kit where an average of 7% of alleles were observed. However, the total number of alleles obtained from the two kits was not significantly different. The quality of the DNA obtained from fired cases was studied with evidence of inhibition in at least 11% of shotshell case samples. After swabbing the head and the hull of three shotshell cases separately, a significantly greater number of alleles was obtained from the hull as opposed to the head of the fired shotshell case. In addition, after firing, various internal firearm surfaces were swabbed, including the chamber of barrel, ejection port, and breechface, in an attempt to obtain amplifiable DNA. DNA was obtained from the chamber of the barrel and was amplifiable using the MiniFiler™ kit, although mixtures were obtained with extensive drop-in and drop-out making this analysis unlikely to aid an investigation.     

Cannabis Regulatory Confusion and Its Impact on Consumer Adoption

The regulation of cannabis in the United States is inconsistent and contradictory, to put it mildly. While marijuana remains classified as a Schedule I substance under the federal Controlled Substance Act—in the same category as heroin and morphine, with accompanying criminal penalties up to and including life imprisonment for its production, distribution, and possession—as of the end of 2020, eleven states and the District of Columbia had legalized recreational marijuana use and thirty-six states and the District of Columbia had decriminalized the use of marijuana for medical purposes. Despite the trend toward legalization, however, marijuana is a stigmatized product. Stigmatized products are those toward which a significant portion of consumers hold negative attitudes and beliefs, whereas the concept of legitimacy is defined as a generalized perception or assumption that the actions of an entity are desirable, proper, or appropriate within some socially constructed system of norms, values, beliefs, and definitions. This article addresses how current legislation and regulations influence consumer perceptions of a product category, and how conflicting regulations (or the lack of regulations) influence the adoption of a stigmatized product such as cannabis (i.e., marijuana and cannabidiol products)     

What is “prison culture”? Developing a theoretical and methodological foundation for understanding cultural schema in prison

What does it mean to say that a prison has a “culture?” Scholars have long emphasized the presence of a “prison code” and, more recently, a “racial code” as salient cultural domains in men's prisons. Yet, even though most people intuitively understand what is meant by “prison culture,” little progress has been made regarding the conceptualization and operationalization of culture as an analytical construct in prison scholarship. The current study makes two primary contributions to this literature. First, drawing on advances in anthropology, cultural sociology, and cognitive science, we incorporate the concept of cultural schema to provide a concrete analytical construct. Second, we test varying conceptualizations of cultural schema as either characterized by consensus or as overlapping relational structures. Using cultural consensus and correlational class analyses among a sample of 266 incarcerated men, we find little evidence of a culture of consensus for either the prison code or the racial code. Furthermore, we show evidence of heterogenous schema among these cultural domains. Our study is relevant to wider disciplinary work on culture as the problem of analytical precision we address is characteristic of much of the work in criminology and criminal justice that evokes culture as an explanatory device.     

Assessing nation-state-sponsored cyberattacks using aspects of Situational Crime Prevention

Research Summary

This study utilized a quantitative analysis of 246 cyberattack incidents reported in the Extremist CyberCrime Database to identify significant predictors of nation-state-sponsored cyberattacks relative to those performed by non-nation-state-sponsored ideological actors. Clarke and Newman's Situational Crime Prevention framework for terrorism was used to identify differential opportunities to successfully affect targets on the basis of tools, weapons, and the ability to access targets in online settings. The analysis noted nation-state-sponsored attacks were less likely to use high-visibility attack methods and more likely to utilize attack methods leading to data breaches. In addition, they were more likely to target state governments and military entities relative to ideological actors.

Policy Implications

Nation-state attacks are more difficult to identify or mitigate while in process, requiring a more robust national cybersecurity policy framework to be implemented that moves beyond current practices. There is a need to better utilize all aspects of government, from legislation to grant funding, in order to deter cyberattacks from continuing into the future.     

On the function of saṁhitā in the Saṁhitā Upaniṣad

Journal of Indian Philosophy - The Sa?hitā Upani?ad [SU] is a little-known Vedic text that presents ‘typical’ Upani?adic teachings on the truth of identity...     

Made in Canada: The evolution of Canadian counter-terrorism policy in the post-9/11 world

Literature on Canada-United States (US) counter-terrorism (CT) cooperation from the early 2000s presumed that Canadian CT policy was driven by US security imperatives and fear, leaving little room for Canada to develop its own path in fighting terrorism. It presumed that: the Canadian government was more worried about the US reaction to terrorism than terrorism itself; Canadian security policy sought to be “separate but cooperative”; and Canadian policy was informed by “wise” understandings of the US. We argue these assumptions no longer hold. Since 2011, with the rise of the Islamic State and foreign fighter activity, the Canadian government took independent steps to address national security concerns in a multilateral environment. We use process tracing to track evolutions in the Passenger Protect Program (Canada's “no-fly list” policy), showing how Canada has increasingly asserted agency in response to violent extremism. It suggests the prior scholarly consensus on the US role in Canadian CT policy must be rethought.     

Ulf Schütze: Language Learning and the Brain: Lexical Processing in Second Language Acquisition

Journal of Youth and Adolescence -     

The Effect of Lower Transaction Costs on Social Security Disability Insurance Application Rates and Participation

Transaction costs pose significant barriers to participation in public programs. We analyze how Social Security Disability Insurance (SSDI) application behavior was affected by iClaim, a 2009 innovation that streamlined the online application process. We use a difference‐in‐differences design to compare application rates before and after 2009 across counties with varying degrees of access to high‐speed internet. We estimate that counties with internet connectivity one standard‐deviation above the mean experienced a 1.6 percent increase in SSDI applications, and a 2.8 percent increase in appeals after the reform. We estimate that the increase in applications due to iClaim can explain 15 percent of the overall increase in applications between 2008 and 2011. Higher exposure to the online application led to a slightly larger increase in SSDI awards, meaning there was a small but significant increase in the overall award rate. Application rates increased the most in rural areas, while appeals and awards had more significant increases in urban areas. These results suggest that the online application reduced transaction costs to applicants, and the lower costs improved the overall targeting efficiency of the application process.