Determining security level in forensic psychiatry: a tug of war between the DUNDRUM toolkit and the HoNOS-Secure

ABSTRACT

Criteria to determine in which level of security forensic patients should receive treatment are currently non-existent in Belgium. Research regarding the assessment of security level is minimal, and limited instruments are available. This study investigated the instruments that measure the need for security level: DUNDRUM-1 and the HoNOS-Secure. The psychometric properties of the DUNDRUM-1, DUNDRUM-2 and the HoNOS-Secure were investigated.

A random selection was made of 100 male forensic patients in prison. The DUNDRUM-1, DUNDRUM-2 and the HoNOS-Secure were scored retrospectively. A subsample of the files was rated by four researchers (n?=?38). Comparisons were made with the security level as decided by the court.

The DUNDRUM-1 achieved excellent inter-rater reliability, and the HoNOS-Secure and DUNDRUM-2 got a moderate score. The internal consistency was highest for DUNDRUM-1 followed by the HoNOS-Secure and was low for the DUNDRUM-2. Both the DUNDRUM-1 and the HoNOS-Secure predicted allocations by the court to high security.

The DUNDRUM-1 outperforms the HoNOS-Secure on psychometric properties and provides clear instructions with regard to the assessment of the security level. Training seems to be important for scoring the DUNDRUM-1. The current study provided more evidence for the applicability of the DUNDRUM-1 in Belgian settings with regard to determining the need for security.     

Influence of rain and malathion on the oviposition and development of blowflies (Diptera: Calliphoridae) infesting rabbit carcasses in Kelantan, Malaysia

The influence of rain and malathion on the initial oviposition as well as development of blowfly species infesting rabbit carcasses decomposing in sunlit and shaded habitats were studied over a period of 1 year in Kelantan, Malaysia. Chrysomya megacephala (Fabricius) was the most dominant species that infested the carcasses, followed by Chrysomya rufifacies (Macquart). In general, rain, depending on its intensity, delayed initial oviposition by 1–2 days and prolonged the pupation period by 1–3 days. The presence of malathion in the carcasses delayed initial oviposition by 1–3 days and prolonged the pupation period by 2–3 days. These findings deserve consideration while estimating postmortem interval since rain is a commonplace occurrence in Malaysia and malathion is one of the common poisons as an agent for choice to commit suicide.     

Technological innovation in the recovery and analysis of 3D forensic footwear evidence: Structure from motion (SfM) photogrammetry

The recovery of three-dimensional footwear impressions at crime scenes can be a challenge but can also yield important investigative data. Traditional methods involve casting 3D impressions but these methods have limitations: the trace is usually destroyed during capture; the process can be time consuming, with a risk of failure; and the resultant cast is bulky and therefore difficult to share and store. The use of Structure from Motion (SfM) photogrammetry has been used widely to capture fossil footprints in the geological record and while there is a small body of work advocating its use in forensic practice the full potential of this technique has yet to be realised in an operational context. The availability of affordable software is one limiting factor and here we report the availability of a bespoke freeware for SfM recovery and subsequent analysis of for footwear evidence (DigTrace). Our aim here is not to provide a rigorous comparison of SfM methods to other recovery methods, but more to illustrate the potential while also documenting the typical workflows and potential errors associated with an SfM based approach. By doing so we hope to encourage further research, experimentation and ultimately adoption by practitioners.