The emotional witness effect: story content,emotional valence and credibility of a male suspect

Abstract

Building on previous research which identified alcohol as the drug of choice for facilitating sexual assaults, this paper analysed 93 rape cases reported to the police in which the victim was under the influence of drugs/alcohol when the assault occurred. The aim was to explore what substances victims consumed to become incapacitated and who induced the state of incapacity. The degree of pre-planning suggests that the offender could be described as opportunistic or predatory. Findings demonstrated that the majority of rapes (coming to police notice) in which alcohol or drugs are implicated, are circumstances where the victim has self-intoxicated through alcohol consumption. There were relatively few cases in which drugs had been administered surreptitiously. The analyses successfully identified differences between rapes that occur when the victim is intoxicated or drugged according to how she consumed that alcohol/drug and what kind of alcohol/drugs she had consumed. The concept of negotiative space is offered as a potential theoretical explanation. The findings are discussed in the light of this and recommendations for crime prevention are made.     

The acid phosphatase test two minute cut-off: An insufficient time to detect some semen stains

The ability to detect semen in sexual offence cases is a crucial first step to locating stains which may be suitable for DNA profiling. Since the development of the acid phosphatase test in the late1950s by Stuart S. Kind, the process undertaken to perform the test has gone largely unchanged. The method currently accepted by operational forensic science laboratories allows 2 min for a reaction to be obtained, and until relatively recently, this has not been challenged. In this research, samples of semen were obtained from three donors and a range of dilutions for each sample were prepared. Each dilution was subjected to acid phosphatase testing using both direct testing and the ‘press test’ method. The results showed that semen could be detected in excess of 15 min in dilutions up to 1 in 400 using the press test method and in dilutions up to 1 in 1000 using the direct method. Of further significance was the observation that using the press test method, the two minute cut-off was insufficient to detect the majority of stains and in some cases, semen stains as strong as 1 in 20 dilutions. This research provides compelling evidence for protocols currently utilised in forensic practice to be reviewed in order that forensic scientists do not overlook potential evidential material that may prove suitable for body fluid identification such as DNA STR profiling.     

The dynamics of committee outliers: Evidence from the house of representatives, 1951–90

In this study, we enter the on‐going debate on committee outliers by addressing two important points. First, we dispute the conventional wisdom that committee outliers are best identified and evaluated using traditional tests of statistical significance. Contesting the appropriateness of such tests, we contend that any observed difference between chamber behaviour and floor behaviour may be substantively significant and use raw mean differences between Americans for Democratic Action (ADA) scores to examine differences between the full House of Representatives and its committees. Second, we attempt to integrate the committee outlier literature into the broader literature on the historical development of the House by using data from 20 Congresses over four decades (1951–90). This longitudinal analysis indicates that there have been interesting dynamic changes in the prevalence of committee outliers across time and committee types in patterns that are consistent with both the principal‐agent framework and the more general literature on congressional change and reform. Many of these important changes are not obvious when relying solely on traditional tests of statistical significance to examine committee outliers.     

Crime,New housing,and housing incivilities in a first‐ring suburb: Multilevel relationships across time

Abstract

Concepts deriving from criminology, housing policy, and environmental psychology are integrated to test two ways that housing conditions could relate to crime in a declining first‐ring suburb of Salt Lake City. For existing housing, we use a model to test whether housing incivilities, such as litter and unkempt lawns, are associated with later crime. For new housing, we test whether a new subdivision on a former brownfield creates spillover reductions in nearby crime and incivilities.

Police‐reported crime rates were highest for residences near the brownfield and lowest for those farther away. After the subdivision was constructed, this linear decline disappeared, reflecting less crime adjacent to the new subdivision, but also more crime farther away. A multilevel analysis shows that incivilities, particularly litter and unkempt lawns on the block, predict unexpected increases in crime. Both brownfield redevelopment and reductions in incivilities may be important ways to improve declining suburban areas.     

The impact of RTC dispositions on local housing and real estate markets

Abstract

This article examines the critical question of whether disposition activity of the Resolution Trust Corporation (RTC) will disrupt local real estate markets by driving values down and encouraging additional defaults. The question is approached by identifying key characteristics of local economies and real estate markets that could be associated with adverse market responses and then examining 12 individual metropolitan areas in this context. A survey of metropolitan areas with high RTC concentrations finds varying potential for adverse impact. Detailed case studies in three metropolitan areas—Dallas, Denver, and Oklahoma City—find the potential to vary widely by property type, quality level, and geographic location. By and large, commercial markets are expected to be less affected because of (1) the already depressed condition of most markets, (2) market segmentation that would insulate investment grade submarkets, (3) capitalization of expectations about disposition, and (4) political constraints on the rate of RTC activity. However, the geographic concentration of inventory that is combined with potential tipping dynamics associated with neighborhood change could render certain affordable housing markets vulnerable to adverse market responses. Policy recommendations to mitigate such impacts are suggested.     

Saliva identification in forensic samples by automated microextraction and intact mass analysis of statherin

The enzyme α-amylase has long been a commonly targeted protein in serological tests for saliva. While being especially abundant in saliva, α-amylase is detectable in vaginal secretions, sweat, fecal matter, breast milk and other matrices. As a result, assays for α-amylase only provide a presumptive indication of saliva. The availability of mass spectrometry-based tools for the detection of less abundant, but more specific, protein targets (e.g., human statherin) has enabled the development of high confidence assays for human saliva. Sample throughput, however, has traditionally been low due to multi-step workflows for protein extraction, quantitation, enzymatic digestion, solid phase cleanup, and nano-/capillary-based chromatography. Here, we present two novel “direct” single-stage extraction strategies for sample preparation. These feature immunoaffinity purification and reversed-phase solid-phase microextraction in conjunction with intact mass analysis of human statherin for saliva identification. Mass analysis was performed on the Thermo Scientific Q-Exactive™ Orbitrap mass spectrometer with a 10-min analytical run time. Data analysis was performed using Byos^® from Protein Metrics. Two sample sets were analyzed with a population of 20 individuals to evaluate detection reliability. A series of casework-type samples were then assayed to evaluate performance in an authentic forensic context. Statherin was confidently identified in 92% and 71% of samples extracted using the immunoaffinity purification and solid phase microextraction approaches, respectively. Overall, immunoaffinity purification outperformed the solid phase microextraction, especially with complex mixtures. In toto, robotic extraction and intact mass spectrometry enable the reliable identification of trace human saliva in a variety of sample types.