Development of a GC-MS method for the simultaneous analysis of latent fingerprint components

Latent fingerprint residue is a complex mixture of organic and inorganic compounds. A full understanding of the composition of this mixture and how it changes after deposition is lacking. Three solvent systems were compared for the simultaneous extraction and derivatization with ethyl chloroformate of selected amino and fatty acids from a nonporous substrate (Mylar for subsequent analysis by gas chromatography-mass spectrometry. A solvent system comprised of sodium hydroxide, ethanol, and pyridine was found to be the most effective. This method was applied to the analysis of latent fingerprint residue deposited on Mylar and preliminary data are presented. Twelve amino acids (e.g., serine, glycine, and aspartic acid) and 10 fatty acids (e.g., tetradecanoic, hexadecanoic, and octadecanoic acids) were identified. The potential application of this method to further the understanding of latent fingerprint chemistry has been demonstrated.     

HRP标记探针MVR分型法在法医学上的应用

采用辣根酶标记寡核管酸探针数字编码小卫星MS可变重复序列（HRP标记探针MVR方法）,检验微量生物材料。结果表明,相当于5μl血液的血痕、单根有毛囊的毛发以及相当于4μl唾液的斑迹均获得了清晰易读的MVR图谱,灵敏度达1ng。将此方法应用于检案实践取得了较好的效果。MVR－PCR技术在法医学个人识别和亲子鉴定方面极有应用前景。     

Co‐enforcing Labor standards: the unique contributions of state and worker organizations in Argentina and the United States

Labor inspection is a central response to the tremendous gap between formal regulations and outcomes for workers throughout the world. Scholarly and policy debates on labor regulation have focused on improving the targeting of enforcement, changing strategies of street‐level agents, and creating private alternatives to state regulation. This paper argues that these proposals, while important, fail to systematically incorporate the potential contributions of worker organizations and, as a result, overlook opportunities for co‐enforcing labor standards, a key element of labor inspection. By contrast, we develop a framework to analyze the relationships between worker organizations and state regulators that underpin co‐enforcement. We ground this framework empirically in comparative cases, set in Argentina and the United States, presenting two cases of co‐enforcement in highly different institutional contexts. In so doing, we seek to illuminate key attributes of labor inspection and guide attempts to enhance enforcement by forging partnerships between regulators and worker organizations.     

Injury Pattern as an Indication of Seat Belt Failure in Ejected Vehicle Occupants

Prior authors have suggested that when occupant ejection occurs in association with a seat belt failure, entanglement of the outboard upper extremity (OUE) with the retracting shoulder belt will invariably occur, leaving injury pattern evidence of belt use. In the present investigation, the authors assessed this theory using data accessed from the NASS‐CDS for ejected front seat occupants of passenger vehicles. Logistic regression models were used to assess the associations between seat belt failure status and injuries. Injury types associated with seat belt failure were significant OUE and head injuries (OR = 3.87, [95% CI 1.2, 13.0] and 3.1, [95% CI 1.0, 9.7], respectively). The two injury types were found to be a predictor of seat belt use and subsequent failure only if combined with a high (≥0.8) precrash probability of belt use. The injury pattern associated with a seat belt failure‐related ejection has limited use in the forensic investigation of crash‐related ejections.     

Forensic Analysis of MTBE Contamination Using Basic Hydrogeologic Concepts

Contamination of groundwater with petroleum hydrocarbons and additives, such as methyl tert‐butyl ether (MTBE), is often linked to the leaking product distribution system of gas stations. In very few cases is it know if and when a leak occurred and how much product was released to the environment. In the absence of direct evidence, a careful analysis of the available data, such as contaminant breakthrough at receptor wells or discrepancies in the product inventory data, may provide evidence about the nature of the release, its timing and magnitude. Using a MTBE contamination site in the formerly glaciated New England region as an example, two possible release scenarios (slow, long‐term release vs. spill) were examined. Of the two scenarios, the slow release could be ruled out as the sole source even though there was no direct evidence for a spill. The analysis of hydraulic test results together with chemical data further permitted to estimate when such an undocumented spill might have occurred. Analyses of the data also allowed these results to be compared to that of a prior transport and fate modeling study. Good agreement and consistency for contaminant travel times was confirmed. This forensic analysis demonstrates that applying basic hydrogeologic principles can aide in the reconstruction of contamination events while providing more readily understandable and defendable evidence relative to complex models. Conceptually, the approach described herein is transferable to other sites with similar hydrogeologies.     

Evaluation of Four Fingerprint Development Methods for Touch Chemistry Using Matrix‐Assisted Laser Desorption Ionization/Time‐of‐Flight Mass Spectrometry,

Four preparation techniques for MALDI/TOF mass spectrometry were compared to determine the ability to gather intelligence for investigations through the chemical analysis of latent fingerprints, defined as “touch chemistry.” Compatible fingerprint development processes used for identification along with new techniques are necessary to evaluate touch chemistry. Ten volunteers deposited fingerprints from solvent residues containing drugs and explosives onto microscope slides. The developers included (A) fingerprint powder, (B) MALDI matrix, (C) fingerprint powder and lifting, and (D) cyanoacrylate fuming with fingerprint powder. Qualitative identification was based on ion images and spectra. The highest average detection rates (88%) were found using methods A and B. Methods C (52%) or D (18%) had limited success. Results demonstrate the importance of imaging coupled to extracted mass spectral data in detecting analytes in deposited fingerprints. Overall, the results suggest continued development of touch chemistry applications could prove useful for gathering intelligence and forensically relevant information.     

UNBUNDLING THE ETHICAL ISSUES OF PRO BONO ADVOCACY: ARTICULATING THE GOALS OF LIMITED‐SCOPE PRO BONO ADVOCACY FOR LIMITED LEGAL SERVICES PROGRAMS

This article seeks to articulate the practical goal of unbundled legal services for the pro bono family law sector as it applies to limited legal services programs (also known as brief advice clinics), through the use of a goal spectrum, derived from the theoretical goal of access to justice. This article briefly discusses the status of the Indiana Rules of Professional Conduct, as they pertain to the ethics of unbundling. This article then focuses extensively on some practical considerations within the ethical issues of both the scope of representation and attorney competence in order to articulate an appropriate goal for unbundled legal services. Finally, the article concludes that service providers in limited legal services programs should explicitly identify and then perform an essential, discrete service that the client needs to have performed in order to help the client meet his or her ultimate objectives. The service provider and the client could then gauge the success of the limited scope representation based on whether and how well the specific service has been provided.