We are meeting on Microsoft Teams: Forensic analysis in Windows,Android, and iOS operating systems

Microsoft released a new communication platform, Microsoft Teams, in 2017. Due in part to COVID-19, the popularity of communication platforms, like Microsoft Teams, increased exponentially. Given its user base and increased popularity, it seems likely that digital forensic investigators will encounter cases where Microsoft Teams is a relevant component. However, because Microsoft Teams is a relatively new application, there is limited forensic research on the application particularly focusing on mobile operating systems. To address this gap, an analysis of data stored at rest by Microsoft Teams was conducted on the Windows 10 operating system as well as on Android and Apple iOS mobile operating systems. Basic functionalities, such as messaging, sharing files, participating in video conferences, and other functionalities that Teams provides, were performed in an isolated testing environment. Cellebrite UFED Physical Analyzer and Magnet AXIOM Examine tools were used to analyze the mobile devices and the Windows device, respectively. Manual or non-automated investigation recovered, at least partially, the majority of artifacts across all three operating systems. In this study, a total of 77.6% of the populated artifacts were partially or fully recovered in the manual investigation. On the other hand, forensic tools used did not automatically recover many of the artifacts found with the manual investigation. Only 13.8% of artifacts were partially or fully recovered by the forensic tools across all three devices. These discovered artifacts and the results of the investigations are presented in order to aid digital forensic investigations.     

Medical examiner response to the drug overdose epidemic in King County Washington: “Real-time” surveillance,data science,and applied forensic epidemiology

As the overdose epidemic overwhelmed medicolegal death investigation offices and toxicology laboratories, the King County Medical Examiner's Office responded with “real-time” fatal overdose surveillance to expedite death certification and information dissemination through assembling a team including a dedicated medicolegal death investigator, an information coordinator, and student interns. In-house testing of blood, urine, and drug evidence from scenes was performed using equipment and supplies purchased for surveillance. Collaboration with state laboratories allowed validation. Applied forensic epidemiology accelerated data dissemination. From 2010 to 2022, the epidemic claimed 5815 lives in King County; the last 4 years accounted for 47% of those deaths. After initiating the surveillance project, in-house testing was performed on blood from 2836 decedents, urine from 2807, and 4238 drug evidence items from 1775 death scenes. Time to complete death certificates decreased from weeks to months to hours to days. Overdose-specific information was distributed weekly to a network of law enforcement and public health agencies. As the surveillance project tracked the epidemic, fentanyl and methamphetamine became dominant and were associated with other indicators of social deterioration. In 2022, fentanyl was involved in 68% of 1021 overdose deaths. Homeless deaths increased sixfold; in 2022, 67% of 311 homeless deaths were due to overdose; fentanyl was involved in 49% and methamphetamine in 44%. Homicides increased 250%; in 2021, methamphetamine was positive in 35% of 149 homicides. The results are relevant to the value of rapid surveillance, its impact on standard operations, selection of cases requiring autopsy, and collaboration with other agencies in overdose prevention.     

Impinging blood droplets on different wettable surfaces: Impact phenomena,contact line motion,post-impact oscillation and dried stains

Understanding the underlying hydrodynamics of impinging blood droplets and finding out the physical parameters determining the bloodstain characteristics are of great importance in blood related forensic investigations. In this work, the impact of non-Newtonian blood droplets on solid surfaces ranging from lyophilic to superlyophobic was systematically investigated and compared to that of Newtonian droplets with a similar dynamic shear viscosity. We show that impinging blood droplets behave as low-viscosity Newtonian droplets in the short-time spreading, which is dominated by capillary and inertial forces, but their non-Newtonian viscoelasticity would notably affect the droplet retraction and post-impact oscillation occurring in large timescales. Whereas the strong liquid–solid adhesion and the non-Newtonian elongational viscosity hinder droplet recoiling and thus alter the impact phenomena on lyophobic and superlyophobic surfaces, the shear and elongational viscosities are coupled to result in higher damping coefficients of oscillating blood droplets after deposition, in comparison to that of impinging Newtonian droplets. The size of the dried bloodstain was found to be different from both the maximum spreading radius of the droplet that can reach during impact and the final radius of the deposited droplet after oscillation, and their correlations are highly dependent on the impact velocity and surface wettability. Moreover, the morphologic characteristics of the bloodstains would also be changed by varying either the impact velocity or the surface wettability. We envision that these findings can not only find applications in the bloodstain pattern analysis, but also provide useful information for medical diagnosis based on blood droplet test.     

Terrorism,Conflicts and the Responsibility to Protect Cultural Heritage

Abstract

Intentional destruction of cultural heritage is a well-known phenomenon which has been particularly exacerbated in recent times. Its common denominator is represented by the intent to persecute the communities for which that heritage represents an essential element of their cultural identity and distinctiveness. In legal terms, it produces different implications, to the point that – depending on the circumstances in which it is perpetrated – it may be qualified as a war crime, crime against humanity, violation of internationally recognised human rights, or evidence of the existence of the intent to commit genocide. Since the whole international community is seriously affected by the destruction of cultural heritage, it is indispensable that the doctrine of responsibility to protect (R2P) be put into practice seriously and effectively with the purpose of protecting humanity against the irreplaceable loss of its heritage.     

Expanding the Boundaries of Criminal Justice: Emphasizing the “S” in the Criminal Justice Sciences through Interdisciplinary Efforts

At its very core, the phrase “criminal justice sciences” points to the interdisciplinary nature of our field. However, efforts to promote and support interdisciplinary teaching and research face significant barriers. In this paper, I address how interdisciplinarity is conceptualized, the history of criminal justice as an interdisciplinary field, why we should promote interdisicplinarity, barriers we confront in interdisciplinary efforts, the degree to which ACJS members engage in interdisciplinary practices, factors related to interdisciplinarity, and opportunities for increased interdisciplinary research in criminal justice. To grow as an academic field, I conclude that we must look to other disciplines such as biology, computer science, policy, and women’s studies as we expand our disciplinary boundaries.     

Fear,Social Interactions,and Violence Mitigation

The fear of crime is generally considered as a social ill that undermines dimensions of individual well-being. Prior research generally specifies the fear of crime as an outcome variable in order to understand its complex etiology. More recently, however, researchers have suggested fear has a deterrence function whereby it reduces individuals’ involvement in violent encounters. This notion could hold important clues to understand the social sources of violence. We examine whether the fear of crime inhibits involvement in violent encounters, both as offender or victim, and if adjustments in routine activities explain these effects. The results suggest fear of crime reduces violence involvement, in part, by constraining routine activities. We conclude that the fear of crime appears to be a mechanism of violence mitigation that, paradoxically, bolsters physical well-being. The results are discussed with regard to their implications for criminological theory and research on interpersonal violence.     

University students’ support to penalty enhancement for hate crime

Laws enabling penalty enhancement for crimes motivated by hostility or prejudice, i.e. hate crimes, have become common in many countries. However, laws as a measure against hate crimes have been contested, because their deterrent effect has gained none or little support in the (limited) literature, and they may be considered symbolic rather than deterrent. This study investigates attitudes towards penalty enhancement for hate crimes. Previous empirical investigations of this question are scarce. The material consists of a survey targeting nearly 3000 Swedish university students. Support for penalty enhancement for hate crime was moderate, shown by one third of the total sample. Results supported the premise that students belonging to a minority group, assumed to be at risk of hate crime victimization, agree to a higher extent of penalty enhancement than students belonging to the majority. Previous victimization experiences and worrying about being victimized were not significantly related to punitive attitudes. However, respondents who perceived the risk of victimization to be increased for minority groups in general were more likely to support penalty enhancement for hate crime. Findings should be confirmed in a nationally representative sample since the public’s perspective on the criminal justice system is important for understanding and dealing with the social problem of hate crime.     

Unregistered residents and registered crime: an estimate for asylum seekers and irregular migrants in Norway

The purpose of our study has been to better estimate the number and types of crimes committed by asylum seekers and irregular migrants. While data on immigration status for non-residents are lacking in Norwegian crime statistics, we use indirect identifiers (lack of a national ID number, citizenship, residency) to arrive at an estimate for persons with a pending asylum claim and the related group of irregular migrants (i.e. non-EU citizens). A very small amount of the total crimes registered with a known offender are committed by this group. However, these groups are most likely overrepresented as offenders compared to the registered resident population, also when taking age and gender into consideration. Our method is recommended in a field otherwise dominated by political arguments and as an alternative to registering asylum status in crime registers.