Traffic accident vs homicide: The contribution of DNA analysis to clarify this mystery. A case report

A marriage procession was going through the road when the vehicle met with a fatal accident and the wife of the driver died. The autopsy revealed lesions according with fatal traffic accident. But, a second autopsy revealed that there were injuries, but it was not reported in the first autopsy protocol. We analyze several autosomal STRs to typify some evidences collected inside the vehicle of traffic accident which were stained by the blood of the woman mortal victim. The results of the analysis of DNA suggested that the victim bled inside the vehicle and died and then, she was placed on the pavement and her husband simulated an accident.     

Forensic value of 14 novel STRs on the human Y chromosome

We identified and characterized 14 novel short-tandem-repeats (STRs) on the Y chromosome and typed them in two samples, a globally diverse panel of 73 cell lines, and 148 individuals from a European-American population. These Y-STRs include eight tetranucleotide repeats (DYS449, DYS453, DYS454, DYS455, DYS456, DYS458, DYS459, and DYS464), five pentanucleotide repeats (DYS446, DYS447, DYS450, DYS452, and DYS463), and one hexanucleotide repeat (DYS448). Sequence data were obtained to designate a repeat number nomenclature. The gene diversities of an additional 22 Y-STRs, including the most commonly used in forensic databases, were directly compared in the cell line DNAs. Six of the 10 most polymorphic markers include the newly identified Y-STRs. Furthermore, these novel Y-STRs greatly improved the resolution of paternal lineages, above the level obtained with commonly used Y-STRs, in the European-American population.     

The random presence of glass and paint on the clothing and footwear of members of the general population: A US baseline survey at various seasons

This study assists the interpretation of glass and paint evidence by filling an existing gap in the background occurrence that reflects the socioeconomic and demographic circumstances in the United States. The collection was performed in a college US city (Morgantown, West Virginia) to determine the effect of the type of clothing worn at different seasons on the presence of glass and paint. Tape lifts and sole scrapings (1038) were collected from 210 participants and up to six clothing and footwear areas per individual. Glass fragments were analyzed via polarized light microscopy (PLM), refractive index (RI), micro-X-Ray fluorescence (μXRF), and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS), while paint specimens were examined by light microscopy and infrared spectroscopy (μFTIR). Higher occurrences of glass and paint were found in the winter season. The winter collection yielded 10 glass fragments and 68 paint particles, whereas the summer collection resulted in one glass fragment and 23 paint particles. The percentage of individuals with traces varied between seasons; 7% of individuals in the winter and 0.9% in the summer had glass, whereas 36% of individuals in the winter and 19% in the summer bore paint. Lastly, when considering the overall garment and footwear areas, glass was detected in 1.4% of the winter set, compared to 0.2% in the summer collection; paint was found in 9.2% of the winter collection, whereas only 4.2% was found in the summer set. There were no instances where both glass and paint were detected on the clothing and footwear of the same individual.     

United Russia’s Primaries and the Strength of Political Machines in the Regions of Russia: Evidence from the 2016 Duma Elections

Abstract

The primary elections of the United Russia party serve as a tool for party organisation and voter mobilisation. In this study, we employ United Russia’s capacity to mobilise voter turnout in the 2016 primary elections as an indirect indicator of the strength of party-controlled regional political machines. Our analysis of the results of the 2016 Duma elections in 83 regions of Russia demonstrates that voter turnout in the spring 2016 party primaries of United Russia to a significant extent explains cross-regional variation in party success.