Analysis of hydrogen peroxide field samples by HPLC/FD and HPLC/ED in DC mode

The goal of this paper is to describe applications of two recently developed HPLC methods for the analysis and confirmation of the presence of hydrogen peroxide residues in field studies. The procedure utilizes two different HPLC systems, one with post-column derivatization followed by fluorescence detection (HPLC/FD), and the other with electrochemical detection (HPLC/ED). The two systems were utilized to detect hydrogen peroxide in a variety of typical forensic samples including pre- and post-blast samples, as well as a series of environmental control samples. Peroxide-based organic explosives were also examined due to their propensity to produce peroxide residues following detonation. Because samples collected from post-blast scenes are frequently shipped or stored prior to analysis, the effects of storage time, temperature and type of substrate material on the recovery of hydrogen peroxide residues were also investigated. The combined results of the study demonstrate the capability of two HPLC approaches with selective detection in the analysis and investigation of suspected incidents involving peroxide based explosives.     

The temporal fate of drugs in decomposing porcine tissue

Drug levels in decomposed individuals are difficult to interpret. Concentrations of 16 drugs were monitored in tissues (blood, brain, liver, kidney, muscle, and soil) from decomposing pigs for 1 week. Pigs were divided into groups (n = 5) with each group receiving four drugs. Drug cocktails were prepared from pharmaceutical formulations. Intracardiac pentobarbital sacrifice was 4 h after dosing, with tissue collection at 4, 24, 48, 96, and 168 h postdosing. Samples were frozen until assay. Detection and quantitation of drugs were through solid phase extraction followed by gas chromatograph/mass spectrometer analysis. Brain and kidneys were not available after 48 h; liver and muscle persisted for 1 week. Concentration of drugs increased during decomposition. During 1 week of decomposition, muscle showed average levels increasing but concentrations in liver were increased many fold, compared to muscle. Attempting to interpret drug levels in decomposed bodies may lead to incorrect conclusions about cause and manner of death.     

City Managers,Career Incentives,and Municipal Service Decisions: The Effects of Managerial Progressive Ambition on Interlocal Service Delivery

City managers play an influential role in brokering intergovernmental service arrangements on behalf of their jurisdiction, yet their motivations for doing so are not well understood. One argument, drawn from theories of bureaucratic entrepreneurship and ambition theory, suggests that cities with managers who are motivated to advance their careers will parlay more interlocal service delivery as means of capturing economic efficiencies. Such strategies serve to build their personal resumes of career achievements. An alternative argument suggests more altruistic motives, including a desire for increased social equity and valuing the common good of the region, compel city managers to pursue interlocal service arrangements. These competing theories are tested on 134 large municipalities, using survey data from the city managers of these jurisdictions, coupled with interlocal revenue and expenditure data for these cities. Results yield greater support for the first theory. However, progressive ambition possesses complex consequences for interlocal service delivery choices. Jurisdictions managed by city managers with career‐enhancement ambitions are more likely to sell services to other local governments. Yet, they are significantly less inclined to buy services from other jurisdictions, thereby underscoring entrepreneurship in shaping managers’ professional trajectories.     

Scavenging behavior of Lynx rufus on human remains during the winter months of Southeast Texas

Animal-scavenging alterations on human remains can be mistaken as human criminal activity. A 32-day study, documenting animal scavenging on a human cadaver, was conducted at the Southeast Texas Applied Forensic Science facility, Sam Houston State University, Huntsville, Texas. A Stealth Cam Rogue IR was positioned near the cadaver to capture scavenging activity. An atypical scavenger, the bobcat, Lynx rufus, was recorded feeding on the cadaver. Scavenging by bobcats on human remains is not a predominant behavior and has minimal documentation. Scavenging behaviors and destruction of body tissues were analyzed. Results show that the bobcat did not feed on areas of the body that it does for other large animal carcasses. Results also show the bobcat feeds similarly during peak and nonpeak hours. Understanding the destruction of human tissue and covering of the body with leaf debris may aid forensic anthropologists and pathologists in differentiating between nefarious human activity and animal scavenging.     

Voluntary and involuntary care: three-year study of demographic and diagnostic admission statistics at an inner-city adult psychiatry unit

Individuals with mental disorders can, under specific circumstances, be detained and treated against their wishes. In 2009, there were 1633 involuntary admissions in Ireland, accounting for 8.1% of all psychiatric admissions. We examined demographic and diagnostic factors associated with involuntary admission in a general adult psychiatry service in Dublin's north inner-city over a retrospective three-year period. The overall admission rate was 450.5 admissions per 100,000 population per year (deprivation-adjusted rate: 345.7), which is lower than the national rate (476.3). The involuntary admission rate was 67.7 (deprivation-adjusted rate: 51.9), which is higher than the national rate (38.5). Fifteen per cent of admissions were involuntary (for all or part of the admission), which is higher than the national proportion (8.1%) but the same as that reported in another inner-city psychiatry service (15.7%). The proportion of admissions that was involuntary was higher amongst individuals from outside Ireland (33.9%) compared to those from Ireland (12.0%) (p<0.001). Country of origin was, however, related to diagnosis: 53.2% of admissions of individuals from outside Ireland were with schizophrenia, compared to 18.5% of admissions of individuals from Ireland (p<0.001). Diagnosis was, in turn, related to admission status: 37.5% of admissions with schizophrenia were involuntary compared to 15% overall (p<0.001). On multi-variable testing, diagnosis was the only independent predictor of admission status (p=0.01) (R(2)=35.2%); country of origin was not an independent predictor of admission status. Deprivation accounts for part, but not all, of the high rate of involuntary admission in Dublin's inner-city. Diagnosis accounts for one third of the variance in admission status between individuals. Further study is required to determine what factors account for the remaining two thirds (e.g. symptoms, insight) and to clarify better the relationships between admission status, diagnosis and country of origin. There is a strong need for enhanced focus on the mental health needs of individuals from outside of Ireland, especially in Dublin's north inner-city.     

Predictive accuracy of dynamic risk factors for aboriginal and non-aboriginal sex offenders: an exploratory comparison using STABLE-2007

Although Aboriginal offenders are overrepresented in Canadian prisons, there is limited research examining the extent to which commonly used risk factors and risk scales are applicable to Aboriginals. Aboriginal (n = 88) and non-Aboriginal (n = 509) sex offenders on community supervision were compared on the dynamic risk factors of STABLE-2007. Data on sexual, violent, any crime, and any recidivism (including breaches) were collected with an average follow-up of 3.4 years. Aboriginal offenders scored significantly higher than non-Aboriginal offenders on STABLE-2007 total scores and on several items measuring general criminality. STABLE-2007 did not significantly predict recidivism with Aboriginal offenders (although it did for non-Aboriginals). The general antisociality items were generally significantly less predictive for Aboriginals than non-Aboriginals, whereas items assessing sexual self-regulation and relationship stability predicted similarly for both groups. These exploratory results suggest that Aboriginal sex offenders are a higher-needs group but that some STABLE-2007 items are not predictive with this population.     

Sexual abuse in Canadian university and college dating relationships: The contribution of male peer support

Using data from a Canadian national representative sample survey of male university and college students, this study tested three hypotheses from a theoretical model which attempts to explain the relationship between male peer group dynamics and sexual assault in dating relationships. Consistent with previous research conducted in the United States, the findings reported here show that male peer support is a significant predictor of sexual abuse in post-secondary school courtship. This article concludes with several suggestions for further research.