Surface Modification for the Collection and Identification of Fingerprints and Colorimetric Detection of Urea Nitrate

Glass surfaces were modified with a combination of dyes and reagents to allow for the potential simultaneous recording of a detailed fingerprint and the detection of the explosive urea nitrate (UN), as a proof of principle of surface modification for simultaneous linking of identity to manipulation of explosives. By coating microscope slides with 9,10‐diphenylanthracene (DPA), p‐dimethylaminobenzaldehyde (p‐DMAB) and p‐dimethylaminocinnamaldehyde (p‐DMAC), a colorimetric change was observed in the presence of UN, while revealing a fingerprint with enough resolution to isolate at least 10 minutiae. This is the first step in creating point‐of‐care devices capable of detecting low concentrations of explosives and drug metabolites and connecting them to a fingerprint.     

The Effect of Clothing on the Rate of Decomposition and Diptera Colonization on Sus scrofa Carcasses

Twenty Sus scrofa carcasses were used to study the effect the presence of clothing had on decomposition rate and colonization locations of Diptera species; 10 unclothed control carcasses were compared to 10 clothed experimental carcasses over 58 days. Data collection occurred at regular accumulated degree day intervals; the level of decomposition as Total Body Score (TBS_surf), pattern of decomposition, and Diptera present was documented. Results indicated a statistically significant difference in the rate of decomposition, (t₄₂₇ = 2.59, p = 0.010), with unclothed carcasses decomposing faster than clothed carcasses. However, the overall decomposition rates from each carcass group are too similar to separate when applying a 95% CI, which means that, although statistically significant, from a practical forensic point of view they are not sufficiently dissimilar as to warrant the application of different formulae to estimate the postmortem interval. Further results demonstrated clothing provided blow flies with additional colonization locations.     

Online fraud victims’ experiences of participating in qualitative interviews

Institutional Review Boards often raise concerns about qualitative research with vulnerable populations such as crime victims, and assume that research with vulnerable populations will be distressing for participants. It is therefore vital to examine whether participants do in fact experience adverse effects stemming from their participation. The existing research is clear that some members of vulnerable populations do feel distressed when they participate in research; however, in most cases, this distress is outweighed by the benefits of participation, such as a sense of having contributed to community awareness raising. This literature is, however, predominantly quantitative. In addition, it overwhelmingly focuses on violent trauma, providing no insight into participants’ experiences of research on non-violent traumatic events. The current study addresses these shortcomings by examining the research participation experiences of victims of online fraud. Specifically, an online questionnaire designed to elicit qualitative data was administered to victims of online fraud who had previously participated in a semi-structured qualitative interview. Among other findings, the study suggests that perceptions about the outcomes of research, in addition to the research process, influence victims’ satisfaction with their participation in qualitative research.