Variation in decomposition stages and carrion insect succession in a dry tropical climate and its effect on estimating postmortem interval

Insects have an important role in minimum postmortem interval (PMI_min) estimation. An accurate PMI_min estimation relies on a comprehensive study of the development and succession of local carrion insects. No published research on carrion insect succession exists for tropical north Queensland. To address this, we aimed to obtain preliminary observational data concerning the rate of decomposition and insect succession on pig carcasses in Townsville and compare these with other regions of Australia and overseas. Adult insects were collected daily from three pig carcasses for 30 d during summer and identified to family level. Observations of decomposition rate were made each day and progression through the stages of decomposition were recorded. Adult insects were identified to family and their presence/absence used as a proxy for arrival at/departure from the remains, respectively. These preliminary data highlight several interesting trends that may be informative for forensic PMI_min estimation. Decomposition was rapid: all carcasses were at the dry/remains stage by Day 5, which was substantially quicker than all other regions in the comparison. Differences were also observed in the presence/absence of insect families and their arrival and departure times. Given the rapid progression through early decomposition, we argue that later-arriving coleopteran taxa may be more forensically informative in tropical Australia, in contrast with temperate regions where Diptera appear most useful. This research contributes preliminary observational data to understanding insect succession patterns in tropical Australia and demonstrates the critical need for comprehensive local succession data for each climatic region of Australia to enable accurate PMI_min estimation. These data will inform future research targeted at gaining a more comprehensive understanding of insect succession in the Australian tropics.

Key points:

• We obtained preliminary observational data concerning the rate of decomposition and insect succession on pig carcasses in tropical Australia.
• Decomposition was rapid: all carcasses were at the dry/remains stage by Day 5.
• Coleopteran taxa may be more forensically informative in tropical Australia than dipterans.

     

Inter-observer error for area of origin analysis using FARO Zone 3D

In a bloodletting incident, the area of origin (AO) of an impact bloodstain pattern is crucial when establishing the sequence of events. The use of laser scanners and other three-dimensional (3D) technologies to document and analyse bloodstains have been the subject of previous papers, especially where AO analysis is concerned. FARO Zone 3D (FZ3D) is a relatively new software programme that can be used for bloodstain AO analysis. FZ3D requires a greater understanding of inter-observer errors associated with AO. This study looked at the inter-observer variation between 21 examiners when repeatedly calculating the AO six times for a single impact pattern on a plain white wall. An impact rig which consisted of a spring tension arm was positioned and fixed 45 cm from the X wall (right wall), and 45 cm from the Y wall (left wall). This experimental design resembles an impact blow for a bloodletting event. The AO was unknown to all examiners, making it a blind study. The collected results were documented in a Microsoft Excel datasheet and later analysed. From previous literature, a 30 cm acceptable allowance was utilised for AO analysis; however, there is currently no accepted standard error for this type of analysis. The overall total 3D mean error for all examiners was 5.62 cm. The maximum error for any one impact analysis was 24.27 cm. The variation of the data, which was collected by all examiners, was documented as X = 1.14 cm, Y = 1.24 cm, Z = 1.68 cm, and the total 3D error = 2.28 cm. The total 3D error for any one examiner and the variance between examiners did not exceed the 30 cm acceptable allowance utilised in previous literature.     

Islam,Islamism, and Post‐Islamism: Rediscovering Politics after the War on Terror

Over the past twenty years, an influential body of conservative scholarship has focused on the alleged conflict between Islam and the West. Following widespread criticism of this scholarship, a number of commentators have revived its core assumptions to claim that the real conflict is between liberal democracy within Muslim societies and the political ideology of Islamism. In this article we trace the evolution of this scholarship, and suggest that recent empirical developments in the Muslim world suggest the potential for post‐Islamist parties to successfully adapt to the demands of democratic competition within Muslim societies. In this context, the emerging conflict is not between Islam and the West, or Islamism and the West, but between two very different discursive practices within the Muslim world that invoke Islam for radically different purposes. A traveler enters the world into which he travels, but a tourist brings his own world with him and never sees the one he's in. ¹      

Changes in staff confidence and attributions for challenging behaviour after training in positive behavioural support within a forensic medium secure service

Positive behavioural support (PBS) is a non-aversive approach to preventing and managing challenging behaviours. Seventy-nine qualified and unqualified nursing, psychology and occupational therapy staff were trained in using PBS. To measure the effectiveness of the training, confidence in managing challenging behaviour and attributions for causality, control and stability were measured before and after the training. To measure confidence, an adapted version of the Confidence in Coping with Patient Aggression Instrument was used. Attributions were measured using the Challenging Behaviour Attributions Scale and the Causal Dimension Scale II. There was a significant increase in confidence after training. In addition, there were significant changes in attributions relating to causality and stability of challenging behaviour, particularly for qualified staff. The results suggest that confidence and attributions are affected positively by training in PBS within a medium secure forensic mental health setting.     

The international anti-debt campaign: A Southern activist view for activists in 'the North'…and 'the South'

The growing crisis of external indebtedness in the South has become the focus not only of multilateral policy debate, but also the subject of an increasingly vocal international anti-debt campaign, the influence of which was clear at the abortive World Trade Organisation at Seattle in late 1999. Though effective, the anti-debt campaign encompasses a range of different positions, which result in diverse strategies and tactics. This paper examines the reasons for and implications of such differences, particularly in relation to North-South solidarity and action, and makes the case for Northern campaigners and lobbyists to take their principal lead from anti-debt groups that are mobilising public opinion in the South.