DNA analysis of ingested tomato and pepper seeds

Ingested food is one of the important types of forensic evidence obtained during a medicolegal autopsy. Many materials containing seeds pass through the human digestive system and are still recognizable; thus, they can be valuable for providing investigative leads. Currently, the identification of seeds relies on microscopic and morphologic examination. However this method sometimes can be problematic. For example, the microscopic appearance of the ingested tomato and pepper seeds is very similar; thus, it is not always easy to distinguish these seeds by comparing their physical characteristics. Tomato and pepper seeds were selected as a model system to assess the value of performing DNA analysis as an alternate and/or complimentary means of seed identification. Results of blind testing indicate that the deoxyribonucleic acid-amplified fragment length polymorphism (DNA-AFLP) results were able to discriminate between pepper and tomato seed samples after they passed through the digestive system.     

The importance of scientific evaluation of biological evidence — Data from eight years of case review

In 2009, the National Research Council published a report stating that the addition of more science and technology into the field of forensic science in the United States would be of great benefit to the judicial system. As a starting point to address this NRC report, one needs to make an assessment of the system. One factor that is continuously requested is an estimate of an error rate. In any given scientific area of forensics that is difficult to quantitate except by external review and audits. After eight years of requested defense review of cases with biological and DNA evidence, most cases appear to be scientifically sound in test methods and procedures. However, there were some cases where errors in the forensic science process did occur. This article takes information compiled from those eight years of defense review and summarizes the cases where errors have been discovered and discusses the scientific implications of these errors. The scope of this article is limited to crime scene collection and forensic science laboratory testing of biological materials for body fluid identification and DNA individualization to a source. The greatest value of defense review comes from (a) providing effective balance and independent oversight to the judicial process and (b) collecting data into a format that can be useful as a guide in training programs.     

Fibres used in the construction of car seats — An assessment of evidential value

The evidential significance of car seat fibres has been investigated. Thirty six samples of car seat fabric were examined and the fibres catalogued according to their morphology and characteristics. The majority of car seat fibres were black or grey thick polyester fibres that were either dyed or pigmented. The MSP spectra produced were unlike those usually obtained from black or grey polyester fibres used in clothing. Tapings taken from car seats were examined for car seat fibres, various types were found showing that these fibres are expected to shed from the fabric albeit in low numbers, unless the vehicle is older. No fibres that matched the samples of the car seat fabric were found on the tapings of the car seats. One hundred garments were examined for car seat fibres, 10% of garments had populations of such fibres present and 41% had at least one car seat fibre present. None of these fibres matched the samples of the car seat fabric or those from the car seat tapings.     

Transgression and Standard Theories: Contributions Toward Penal Abolition

In this paper I propose a transgression theory and a standard theory toward penal abolition. I argue that given the ubiquity of “crime” in human relationships, to speak of “criminal behavior” as deviant nullifies the concept deviance (abnormal, out of the ordinary, etc.). After demonstrating that empirically the opposite is the case, I argue for a transgression theory (that most human beings regularly act in ways that transgress the norms and laws they establish) and propose a standard theory (that human beings are both maintainers and transgressors of the social orders they establish). My paper challenges the foundational language (constructions) of “criminal justice” logic that ignore the continuity of the past in the present (white supremacy, neocolonialism, racial capitalism, and gendering enslavement), and that fortify discourse and practice from recognizing, eliminating and standing accountable by rectifying centuries of white privilege, heteronormativity, and the oppression of nonwhite bodies.     

Effect of Early Child Care and Education Attendance Hours on Parent–Child Interaction in Central Asia: Evaluation of Multiple Indicator Cluster Surveys

Parent–child interaction is important for early childhood development and best practice in early child care and education (ECCE) promotes effective parent–child interaction. However, research about ECCE impact on parent–child interaction is inconclusive. This study analyzed data from Multiple Indicator Cluster Surveys (MICS) to examine the effect of ECCE attendance on parent–child interactions in Central Asia, using a 2SLS regression analysis to explicitly model selection bias and isolate the causal effect of ECCE on the quality of parent–child interactions.The study found that increased hours of ECCE led to increased parent–child interaction in every country under investigation. This demonstrates that even underfunded ECCE programs in Central Asia can have significant positive effect, and has broader implications for all ECCE programs.