Can latent fingerprint disclose the sex of the donor? A preliminary test study using GC–MS analysis of latent fingerprints

While fingerprints are a highly used means of identification, not every fingerprint left behind on a potential crime scene can be used for identification purposes. In some cases, the fingerprint may be smudged, partially preserved or overlapping with other prints hence distorting the ridge pattern and may therefore be not appropriate for identification. Further, fingermark residue yields a very low abundance of genetic material for DNA analysis. In such cases, the fingermark may be used to retrieve basic donor information such as sex. The focus of this paper was to assess the possibility of differentiating between the sexes of the donor of latent fingermarks. Analytical method was GC–MS analysis of the chemical compounds of latent fingermarks using 22 male and 22 female donors. Results showed 44 identified compounds. Two alcohols, octadecanol C₁₈ and eicosanol C₂₀, were found to show a difference that was statistically significant between male and female donors. There is also some evidence for the possibility of distinguishing sex of the fingermark donor based on the distribution of branched chain fatty acids, as free compounds or esterified in wax esters.     

Palynology and mycology as biological evidence in a homicide case

Criminal cases are studied from several disciplines to link a suspect with a criminal act. In this case, a man was reported missing in a coastal area in Buenos Aires Province, Argentina. The victim's relatives pointed to a possible suspect, and the local police carried out the investigation. We contributed to this research by applying palynological and mycological techniques. Palynomorphs and fungal spores offer valuable trace evidence, as they can be easily transferred between objects and crime scenes due to their minute size and persist on them for a long time. The victim was found 25 days later, lying on sandy soil, which partially covered the body, 35 km from where the suspect was arrested. Comparative samples were collected from the crime scene and the suspect's home and belongings (clothes, footwear, and seized vehicle). The palynological associations obtained from the crime scene and the defendant's belongings were dominated by diatoms and acritarchs (Acantomorphitae), all elements of marine origin, and a high CFU number of Bipolaris cynodontis, which allowed the defendant's clothing to be related to the place of corpse discovery. Soil from the defendant's home had an entirely continental composition, and the fungal biota was characteristic of prairie areas which were different from those of the crime scene.     

Rapid enantiomeric analysis of zopiclone in serum by supercritical fluid chromatography–tandem mass spectrometry

Zopiclone (ZOP) is a hypnotic drug prescribed to treat insomnia. Due to the chiral nature of ZOP, the psychologically active S-form and inactive R-form need to be determined enantiomerically in a forensic drug analysis. In the present study, a supercritical fluid chromatography (SFC) method was designed with a faster analysis ability than that of previously reported techniques. The SFC–tandem mass spectrometry (SFC–MS/MS) method was optimized using a column with a chiral polysaccharide stationary phase (Trefoil CEL2). ZOP was extracted from pooled human serum using solid-phase extraction (Oasis HLB) and analyzed. The developed SFC–MS/MS method achieved the baseline separation of S-ZOP and R-ZOP within 2 min. The fit-for-purpose method validation indicated that the optimized solid-phase extraction achieved near complete recovery and approximately 70% of the matrix effect. Both the retention time and peak area showed sufficient precision. The lower and upper limits of quantification (LOQ) were 5.7 × 10⁻² ng/mL and 25 ng/mL for R-ZOP, and 5.2 × 10⁻² ng/mL and 25 ng/mL for S-ZOP. The calibration line was linear in the range from lower LOQ to upper LOQ. The stability test indicated that ZOP in serum stored in a refrigerator (4°C) degraded and about 55% remained in 31 days. The quick analysis of the SFC–MS/MS method makes it a valid option for the enantiomeric analysis of ZOP.     

Shedder status—An analysis over time and assessment of various contributing factors

The shedder status of a person is an important consideration when evaluating probabilities of DNA transfer during activity-level assessments. As an extension of our previously published study, the shedder statuses of 38 individuals were reassessed 1 year later. The study found that shedder status may change over time for some individuals and was associated with one's gender, number of items touched, and mobile phone usage. In 29% of touch events, no DNA allele was detected and in 99% of touch events, the amount of DNA deposited was <2 ng. The study also found that in 0.6% of touch events, the participant could be excluded as a contributor of the observed DNA profile, with another person being included. Additionally, our investigations suggest that the current three-category system for shedder status classification may require further refinement to better represent the individuals' shedder status in a population.     

Comparing Male and Female Prison Releasees across Risk Factors and Postprison Recidivism

This study, using data from a large sample of prison releasees, examined the similarities and differences in men's and women's risk factors for recidivism involving rearrest for any crime and rearrest for a violent crime during an average 3.4-year follow-up period. Logistic regressions revealed several gender differences. Prior incarceration, time served, and specific types of prior arrest histories had differential associations with women's and men's overall and violent recidivism. Age, race, and conviction offense were gender-specific risk factors for overall recidivism, and education level and marital status were gender-specific risk factors for violent recidivism. Implications for risk assessment are discussed.     

Kairós and Clinamen: Revolutionary Politics and the Common Good

This article sets out to offer a new reconceptualisation of the common good as the mechanism providing the temporal coordinates for revolutionary politics. The first section investigates the pairing of commonality and goodness, revealing its nature as a synthesis of apparently irreconcilable opposites. The second section examines how this irreconcilability is overcome, advancing the argument that to heal the divide, a double movement of definition and concealment is necessary, whereby the process of definition of what constitutes the common good is accompanied by an expropriation, or hollowing out, of meaning. The third section offers a proposal for overcoming this epistemological impasse about the nature of the common good, by contrasting chronos and kairós, chronological time and what in English can be translated as ‘opportune time’, and offering kairós as the chance to create, within the fissures of the totalitarianism of chronological time, the timescape for revolutionary politics. This proposal is carried on in the second part of this article, starting with ‘ Chronos and Kairós ’ section, where the concept of kairós is expanded upon and coupled with the Epicurean and Lucretian idea of the clinamen, the swerve of the atoms that introduces the element of chance against Democritean determinism. With the support of Antonio Negri’s reading of kairós and clinamen, the article argues in ‘Alma Venus: Love, Desire and Revolution’ section that these two concepts provide the spatial and temporal coordinates for revolutionary politics, in tension and critical engagement with Ackerman’s idea of constitutional moments, to conclude in ‘Conclusions: Kairós and Revolutionary Politics’ section, that the common good is to be defined as that which takes place and is identified/identifiable within these coordinates.     

Demographic and abuse characteristics in adolescent male sexual offenders with “special needs”

Adolescent sexual offenders with “special needs” are thought to pose different challenges for therapists working clinically. However, this population has received little attention in the literature, with the research in this area very limited. This study looked at the demographic and abuse characteristics of 24 adolescent sexual offenders with “special needs” who were compared with a group of 155 male adolescent sexual offenders with no special needs. Significant differences were found between the two groups. Those with special needs had higher levels of all forms of abuse, and differences were also found on some sub-scales of the Child Behaviour Checklist. Implications for research and clinical practice are discussed.     

Personal construct psychotherapy: Fixed-role therapy with forensic clients

Abstract

Fixed-role therapy, a dramaturgical approach to psychotherapy developed by Kelly in 1955, has been used in a variety of situations over the years with various client groups, including criminal offenders. Some of the benefits and limitations of fixed-role therapy with sexual abusers will be discussed. It is suggested that the strengths of some offenders, such as the social skills necessary to succeed at confidence games, be recognized and directed in fixed-role sessions. Illustrations of a number of issues will be drawn from two clinical case examples.