Cyanide quantification in post-mortem biological matrices by headspace GC-MS

Cyanide is a powerful chemical asphyxiant found in some forensic cases following voluntary (suicide) or involuntary ingestion (fire, accidental exposure). A quantification method for cyanide that is specifically suited to post-mortem forensic purposes was developed. Determination was performed by headspace gas chromatography coupled to mass spectrometry using a GS-GASPRO column on an HP-6890 gas chromatograph with an HP-5973N mass detector. The biological sample was treated with an internal standard, frozen, glacial acetic acid was added and the sample was then incubated at 60°C for 15min. The headspace was sampled with a disposable syringe, and analyzed to quantify hydrogen cyanide. Isotopically labeled cyanide ((13)C(15)N) was used as the internal standard to minimize matrix effect and sampling error. The method produced an extended linear dynamic range (0.07-50μg/mL), and a method detection limit of 0.02μg/mL. Identical calibration curves were obtained when blood, gastric contents and aqueous solutions were used as the calibration standard matrix. This method was also successful in quantitating cyanide in gastric contents, one of the most variable biological fluids. The method has been validated and is being used for current forensic cases such as fire victims and suicides.     

A forensic international market survey of condom lubricants and personal hygiene products using ATR-FTIR coupled to chemometrics

Condom residues may be encountered in forensic investigations as traces in sexual assault or rape cases. Casework studies have shown the value of distinguishing condom residues from other types of personal products used by women. However, up to now, there has been no investigation of their chemical variability within an international context. This work employed attenuated total reflectance Fourier transform infrared spectroscopy with chemometrics to provide objective characterisation of condom lubricants and personal hygiene products from the international market. 166 samples were obtained covering five major classes of products likely to be used by women. Principal component analysis distinguished most major classes based on their spectral profiles, with subsequent support vector machine models yielding discrimination accuracies over 90%. A two-step approach was subsequently developed and enabled both classification and a discrimination accuracy of 100%. This could provide greater confidence in chemical discrimination of residues from these products when conducting investigations and help assess the origin of the chemical profile obtained. Further testing using three validation sets produced an identification accuracy of 100% for generic classes, which may allow investigative leads to be more readily obtained from recovered evidence.     

Issues Surrounding Post-Adoption Contact in Foster Adoption: The Perspective of Foster-to-Adopt Families and Child Welfare Workers

Current research on open adoption gives less consideration to issues surrounding post-adoption contact with birth parents for children adopted from care. Yet, it is widely recognized that the profile of the children and their birth parents, as well as the quality of post-adoption contacts, vary considerably depending on the context in which the adoption takes place. This article is based on interviews with 32 child welfare workers and 16 foster-to-adopt families. It focuses specifically on aspects and conditions that should be taken into consideration when determining whether or how contact between the adopted child and the birth family should be maintained. Our results show that there are distinctive challenges and dilemmas for open adoption in situations where the adopted child comes from a maltreating family, under the responsibility of child welfare services.     

Say It With Candy: The Power of Framing Tax Increases as Items

Framing tax increases as frequent purchases appears to be a popular message strategy to generate donations and elicit support for policies. We test whether this strategy is effective at obtaining support for tax increases through two survey experiments. Results demonstrate that this message strategy—framing tax increases in terms of items—is more effective than stating the increase in terms of a yearly or weekly amount. This strategy appears to be effective when the amount of a tax increase is framed as a hedonic item and appears to be particularly effective as the tax amount requested increases and among those uninvolved with the issue under consideration.     

Identification of some factors influencing soil transfer on shoes

In criminal activities, soil can be transferred from a crime scene to items linked with a perpetrator; for example, shoes, cars or tools. Several parameters will influence the quantity of soil transferred in a given scenario. The knowledge of the most influential factors can help the expert to assess the evidence using a logical approach at the activity level or to predict the amount of soil that can be expected in a given scenario. The influence of five chosen parameters, namely the shoe profile, shoe size, walker's weight, soil type and soil humidity were assessed using Design of Experiment (DOE) in order to understand their influence on soil quantity transferred on shoes.The Faced Central Composite Design (FCCD) using a quadratic model was found to be highly significant, thus they could be adequately used to model and to interpret the amount of soil recovered from one shoe.These designs demonstrate that the characteristics of the donor (soil type and soil humidity), as well as a combination of these two factors have a very significant impact on the soil transfer. The characteristics of the receptor (shoe profile, shoe size and walker's weight) also have an impact on the transfer but to a lesser extent.Globally, this research provides valuable information for the forensic scientist both in investigative mode: evaluation of the soil quantity possibly transferred on shoes, and in the evaluative steps: is the quantity of soil found on the suspect shoes in accordance to the proposition/scenario given by the prosecution and the defence?     

Improving the Relevance of Parliamentary Institutions: An Examination of Legislative Pre-budget Consultations in British Columbia

This study examines the influence of the Select Standing Committee on Finance and Government Services in the budgetary process in the Canadian province of British Columbia. The mandate of this committee is to conduct pre-budget consultations every year to seek the opinion of the population on the content of the next provincial budget. Many have recommended increasing use of legislative committees to bring back relevance to parliamentary institutions in Canada. It is believed that legislative committees provide an environment that is less conducive to partisan confrontations and can help in building the policy expertise of parliamentarians. Using interviews with committee members and a survey among participants in pre-budget consultations, this was found to be the case. The main finding points to the potential of legislative committees in performing a representative function because they can put forward the views of the public as part of the budgetary process.     

Qualitative Exploration of the Influence of Domestic Violence on Motherhood in the Perinatal Period

The perinatal period may include domestic violence (DV). In this study, the perinatal period extends from the start of pregnancy to the end of the child’s second year of life. DV places the safety of both mother and child at risk and undermines the mother–child attachment bond. In this article, we look at the challenges for motherhood in a context of domestic violence during the perinatal period (DVPP). In semi-directed interviews, 17 mothers shared their stories of DVPP. Interview questions focused on the trajectory of DVPP, perceptions and occupation of motherhood within two years of childbirth and the associated challenges. Data were analyzed using thematic analysis and discussed in a feminist conceptual framework and a parental theoretical model. DVPP negatively influences the experience and practice of motherhood, in addition to increasing parental responsibility to protect the child. Three main themes were noted: 1) A parental experience impoverished by the context of DVPP, caused by an increase in tasks, a weakened bond with the child and a loss of self-confidence; 2) Parenting responsibility in a context of DVPP is expressed as greater vigilance and the need to protect the child from violence; and 3) Parenting practices: the children as targets and victims of violence, resulting in additional child needs that mothers must meet. The results underscore the need for early detection of DVPP and a trauma-informed approach in health services. Specialized support services should be provided to help mothers cope with violence.