Image analysis of gunshot residue on entry wounds. II--A statistical estimation of firing range.

A statistical investigation of the relationship between firing range and the amount and distribution of gunshot residue (GSR), used automated image analysis (IA) to quantify GSR deposit resulting from firings into pig skin, from distances ranging between contact and 45 cm. Overall, for a Ruger .22 semi-automatic rifle using CCI solid point, high velocity ammunition, the total area of GSR deposit on the skin sections decreased in a non-linear fashion with firing range. More specifically there were significant differences in the amount of GSR deposited from shots fired at contact compared with shots fired from distances between 2.5 and 45 cm; and between shots fired from a distance of 20 cm or less, with shots fired at a distance of 30 cm or more. In addition, GSR particles were heavily concentrated in the wound tract only for contact and close range shots at 2.5 cm, while the particle distribution was more uniform between the wound tract and the skin surfaces for shots fired from distances greater than 2.5 cm. Consequently, for future scientific investigations of gunshot fatalities, once standards have been established for the weapon and ammunition type in question, image analysis quantification of GSR deposited in and around the gunshot wound may be capable of providing a reliable, statistical basis for estimating firing range.     

The linguistic fault: The case of Foucault's archaeology

It is argued that the concept of discursive formation presented by Foucault provides the means whereby conventional treatments of ‘discourse’ can be criticized. These would include historical, linguistic and epistemological forms of investigation. But it is also argued that Foucault does not sufficiently displace linguistic categories. As a result his account of the theoretical problems of ‘conditions of existence’ of discourses cannot be sustained.     

Interrogation of short tandem repeats using fluorescent probes and melting curve analysis: A step towards rapid DNA identity screening

Current forensic DNA profiling methods rely on the analysis of samples at specialised laboratories with an average turnaround time of several days. The ability to rapidly determine a partial profile of short tandem repeats at the point-of-arrest would be of great benefit to police forces around the world, for example enabling a suspect to be rapidly included or excluded from an investigation. We have developed a homogeneous PCR method for the interrogation of STR loci utilising fluorescent oligonucleotide probes and melting curve analysis. Alleles of the D18S51, TH01 and D8S1179 loci were differentiated and identified on the basis of target length and probe melting temperature. Assay performance was evaluated by comparing melting peak data with the AmpFlSTR^® SGM Plus^® system. The method is compatible with direct analysis of unpurified buccal swab samples, enabling a partial STR profile to be generated within 1 h.     

Inca, Sailor, Soldier, King: Gregor MacGregor and the Early Nineteenth‐Century Caribbean

This article examines the recruiting practices, political propositions and changing identities of the Scottish adventurer Gregor MacGregor in the early nineteenth‐century Caribbean. Based on original archival research and revision of the existing secondary literature, it seeks to understand why he has consistently been judged as a failure, and why neither Scotland nor any of the countries MacGregor worked in have wanted to claim him as their own hero. After an introduction providing biographical details and some historical context for the Caribbean in the period 1811–1830, the article looks in detail at what have been seen to be his successes and failures in the Caribbean region. It asks to what extent questions of ethnicity or masculinity have affected the way contemporaries and historians viewed MacGregor and his actions. In conclusion, it suggests that although he was a soldier and a sailor, and he was declared both an Inca and a King, his career was deemed a failure by both contemporaries and historians in Scotland, South America and the Caribbean. The main explanation for this negative assessment is that his ambitions continually fell foul of the interests of various Caribbean elites and of the distinctive historical circumstances of the region.¹