Biological and DNA evidence in 1000 sexual assault cases

Using a Filemaker-based database (DNA Pro-FILES, Synchrone Infosystème Inc.), we have conducted a large-scale study on 1000 sexual assault (SA) cases where a standardized kit was submitted to our laboratory alone or with other types of exhibits. We looked at the likelihood of obtaining good quality DNA evidence, allegedly from the assailant, according to a number of parameters.The overall proportion of SA cases with DNA evidence is nearly 50%. A little more than 30% of SA kits provided DNA evidence while for 16% of cases DNA evidence could be obtained only from other exhibits.The likelihood of obtaining DNA evidence is approximately 50% in teenager and adult SA cases, but much lower for children 10 years old or younger (15%). In children cases, profiles were found mostly on clothing or skin swabs.The likelihood of obtaining DNA evidence from vaginal swabs remains good for up to 3 days after the assault (from 35% on the first day to 23% on the third day). A DNA profile was obtained from approximately 22% of anal/rectal swabs and 41% of skin swabs taken less than 1 day after the assault. Less than 10% of oral washes provided DNA evidence, all having been collected within 24 h of the assault.We found that in bodily samples, a negative result for acid phosphate (AP) is a poor predictor of the likelihood of obtaining good quality DNA evidence. Approximately 15% of vaginal swabs and 8% of anal swabs negative for AP nevertheless provided good quality DNA evidence.     

Is it acceptable for a psychiatrist to break confidentiality to prevent spousal violence?

Study questionWhen is it acceptable for a psychiatrist to break confidentiality to protect the wife of a potentially violent patient?Methods153 lay persons, 13 nursing personnel, 10 physicians, and 10 psychologists in France indicated this acceptability in 48 scenarios. The scenarios were all combinations of 5 factors: gravity of threat (death or beating), certainty of mental illness (certain or not), time spent talking with patient (considerable or little), his attitude toward psychotherapy (rejection, indecision, or acceptance), and whether the physician consulted an expert.ResultsLay people favored breaking confidentiality more than did nursing personnel or psychologists. Consulting an expert had greatest impact. Lay participants were composed of groups that found breaking confidentiality “always acceptable” (22 participants), “depending on many circumstances” (106), requiring “consultation with an expert” (31), and “never acceptable” (27).ConclusionLay people in France are influenced by situational factors when deciding if a psychiatrist should break confidentiality to protect a patient's wife.     

A comparative study of the attitudes of Urban,Suburban and Rural Police Officers in New Jersey regarding the use of force

This article examines the attitudes of sample populations of urban, suburban and rural police officers in New Jersey in regard to a hypothetical use of force scenario. The aim of the study is to identify similarities and differences in the perceptions of officers who are faced with the same type of hypothetical situations but who are exposed to different training, procedural and environmental factors. Police officers in the United States receive different types of training in each state that might influence their attitudes towards the use of force. A pilot study was conducted comparing two urban police departments from two different states and showed some differences in the attitudes of the surveyed officers. To further explore these differences, a more refined look at three police departments in one state (New Jersey) was conducted as part of a doctoral dissertation of the lead author. Research questions are aimed at identifying the differences in the frameworks for the justification of force based on a host of variables. The research questions stipulated that there will be some significant differences in attitudes towards the use of force by the officers, based on physical location of the communities they police. The findings of the study identified additional factors that might influence the officers’ attitudes. Twelve focus groups, four at each of the sites, were analyzed and it appears that there may be a geographic and demographic influence on how the officers respond to the scenario.     

Impact of emergency department intimate partner violence intervention

The objective of the study is to assess the impact of emergency department (ED) intimate partner violence (IPV) counseling and resource referrals on patient-perceived safety and safety planning. ED patients with risk factors were offered consultation with trained IPV advocacy counselors who completed safety assessments, provided resource referrals, and helped patients develop safety plans. Patients were contacted after ED intervention to assess progress and further assist in IPV counseling. Over 96% of patients perceived an increase in their safety after the intervention, and approximately 50% had completed a portion of their safety plan. Legal assistance and/or law enforcement were considered the most beneficial resource referrals. Although follow-up was limited, this study appears to demonstrate that an ED IPV intervention program may be useful in helping IPV victims achieve safer living environments and access local resources.     

Development of a Nomenclature System for a Canine STR Multiplex Reagent Kit*†

Abstract: Despite the popularity of dogs in US households, canine DNA evidence remains largely untapped in forensic investigations partially because of the absence of well‐defined forensic short tandem repeats (STRs), lack of standardized and validated PCR protocols, STR reagent kits, and poorly developed nomenclature. A nomenclature system was established based on internationally recognized recommendations for human forensic STRs for a recently developed canine STR reagent kit. Representative alleles were sequenced from each of the 18 STRs and the sex‐typing marker included in the kit. This study also reflects on the impact of point mutations, insertions, and deletions within and outside the STR core repeat structures. An understanding of the STRs’ sequence and repeat structures will enable development of a robust and reliable allele nomenclature and improve the accuracy and precision of allele fragment sizing in canine forensic profiling. The expected allele sizes have been calculated, and their repeat stuctures defined based on sequence information.     

The Effect of Decalcifying Solutions on Hemosiderin Staining

Abstract: To determine whether routine decalcification may reduce the amount of stainable iron that is visible on tissue sections, samples of liver and lung tissue with excessive iron stores were placed in three standard decalcifying solutions (i) formic acid [33%], formaldehyde [4%], and NaCl [0.85%]; (ii) formic acid [30%], formaldehyde [4%], and water; and (iii) nitric acid [5%] for 24, 48, 72, and 96 h. After exposure to the decalcifying solutions, the tissues were stained with Perls stain. The slides were examined blind and the intensity of iron staining was scored semiquantitatively from 0 to 3+. The trend in all samples over the course of the experiment (96 h) was for reduction in the intensity of hemosiderin staining. As the amount of stainable hemosiderin in tissues may be significantly altered by decalcification, the absence of hemosiderin in tissues adjacent to a fracture site does not necessarily indicate that the injury was acute.     

The Need for a Positive Psychological Approach and Collaborative Effort for Improving Practice in the Interrogation Room

The White Paper suggests important reforms that will reduce the likelihood of false confessions resulting from police interrogation. The research underlying these suggested reforms has yielded significant advances in our understanding of factors associated with false confessions. As we move forward, we encourage the development of empirically based approaches that provide a viable alternative to current practice. In doing so, we suggest that researchers pursue a positive psychological approach that involves partnering with practitioners to systematically develop interrogative methods that are shown to be more diagnostic. By taking such an approach, we believe that the recommendations offered in the current White Paper can be supplemented by methods that carry the support of both scientific and law enforcement communities.     

Crime trends through two decades of social changes in Spain

Over the last two decades, the Spanish social fabric has undergone a variety of profound changes, which in turn may explain the rise in police-recorded crime and prison population figures. Although the rise in crime reported to the police has been higher for common offences—misdemeanors—, the mainstream media concentrates overwhelmingly in serious violent crimes—felonies—. Spain does not have an official agency responsible for conducting victimization surveys to measure crime trends as directly experienced by the citizens. Based on this methodology, our study shows that contrary to information gathered from police data, and despite social fabric changes, crime in Spain is decreasing. The present study also reveals the distorted public perception of this trend, which seems to respond to a repetitive coverage of serious crime by the mainstream media.     

Policy learning as complex contagion: how social networks shape organizational beliefs in forest-based climate change mitigation

Policy Sciences - Policy learning can alter the perceptions of both the seriousness and the causes of a policy problem, thus also altering the perceived need to do...