Using Paint to Investigate Fires: An ATR‐IR Study of the Degradation of Paint Samples Upon Heating

Fire investigation is a challenging area for the forensic investigator. The aim of this work was to use spectral changes to paint samples to estimate the temperatures to which a paint has been heated. Five paint samples (one clay paint, two car paints, one metallic paint, and one matt emulsion) have been fully characterized by a combination of attenuated total reflectance Fourier transform infrared (ATR‐IR), Raman, X‐ray fluorescence spectroscopy and powder X‐ray diffraction. The thermal decomposition of these paints has been investigated by means of ATR‐IR and thermal gravimetric analysis. Clear temperature markers are observed in the ATR‐IR spectra namely: loss of ν(C = O) band, >300°C; appearance of water bands on cooling, >500°C; alterations to ν(Si–O) bands due to dehydration of silicate clays, >700°C; diminution of ν(CO₃) and δ(CO₃) modes of CaCO₃, >950°C. We suggest the possible use of portable ATR‐IR for nondestructive, in situ analysis of paints.     

Carbon Monoxide Poisoning and Death in a Large Enclosed Ventilated Area

A 55‐year‐old man with a medical history of tobacco use suddenly collapsed while power washing an empty indoor pool in a hotel. The decedent was transported to the local hospital where he was pronounced. A postmortem examination revealed atherosclerotic heart disease and bilateral pulmonary edema and congestion. A postmortem blood carbon monoxide (CO) level was 27% saturation, and a CO performed on hospital admission blood was 49% saturation. CO poisoning is a common cause of toxicological morbidity and mortality in the United States. The circumstances most often occur in an enclosed environment and may be intentional or unintentional. CO poisoning has been reported in open, well‐ventilated spaces, but rarely results in death. A warning label was present on the engine clearly stating the dangers of CO emission. However, there was a false sense of security due to the large size of the pool room and the presence of industrial blowers that were being used for ventilation.     

Slaves as criminal informers in ancient Rome

The Romans expected slaves to inform on their fellow slaves, particularly in regard to the master's safety. If a slave killed his master, a terrible retribution on the entire household of slaves would have to be paid to atone for the offense. In the final analysis, the slave‐informer system, with all of its drawbacks, supported the Roman criminal justice system nearly 1,000 years and the Byzantines employed it in a modified form. This paper is a case study of how a culture, with its values, musters its resources, in the case of slavery, to cope with the problems of internal security.

With most of the crime problems that confront us today, the ancient Romans were hard put to protect the public peace. They had neither the modern technology nor the forensic science that we do, so they utilized the limited resources they had to prevent crimes and catch criminals. They devised a policy of enticing slaves to act as criminal informants with the offer of freedom. Considering the sizeable adult slave population, this policy greatly deterred crime and the saying “Every slave, an enemy” became current among the citizenry.

The Romans, however, did not intend to open a door by which slaves could accuse citizens of false charges out of vindictiveness. The legal‐minded Romans adopted the safeguard of having the slave informant interrogated under torture.

Slaves also served the criminal justice system in other ways besides volunteering information. When the police were stymied in an investigation, they “rounded up the usual suspects” in the form of slaves who might have knowledge of the crime, but for some reason had not stepped forward. The police would use their powers to interrogate slaves in this case, too. This ancient practice reflects the procedure of modern police investigators checking surveillance cameras in the vicinity of the crime scene in the hopes of discovering a clue.     

Actuarial Sentencing: An “Unsettled” Proposition

This paper discusses the concerns associated with the introduction of, and increased reliance on, actuarial risk tools in sentencing in order to: (1) stimulate cross-disciplinary dialog and research about the impact of incorporating actuarial risk logic into sentencing processes and (2) identify questions requiring further empirical examination. In this article, I recognize that actuarial risk logic offers managerial and organizational benefits, but I also demonstrate that the application of actuarial risk when sentencing offenders is not without important consequences. First, I provide a brief outline of the emergence, logic, and entrenchment of probabilistic reasoning within criminal justice decision-making, and the more recent extension and application of actuarial risk logic to sentencing. Then, I use the following themes to define the limits of using risk sciences in sentencing: (1) the logical structure of risk; (2) the slippage between risk prediction and individual causation; (3) current methodological limits of risk science; (4) the potential for gender and race discrimination; (5) the legal relevance and transparency of risk-based sentencing; and (6) the jurisprudential and organizational impact of various risk technologies. Importantly, the nature and severity of these complications will vary by, and within, the jurisdiction (or sentencing regime) because current sentencing practices are influenced by local jurisdictional needs and sentencing laws.     

The Differentiation of Menstrual from Venous Blood and Other Body Fluids on Various Substrates Using ATR FT‐IR Spectroscopy

Crime scene investigators and laboratory analysts use chemical tests to detect and differentiate body fluids. Testing often requires a sample of the stain, and the chemicals may cause degradation of the fluid or interfere with subsequent tests. Colorimetric chemical tests do not differentiate between different types of the same fluid, such as venous and menstrual blood, and there is no presumptive test available to simultaneously differentiate several body fluids. In this study, we recorded ATR FT ‐IR spectra of venous and menstrual blood, semen, saliva, and breastmilk. Neat and simulated casework body fluid samples were analyzed on cotton, nylon, wood, paper, and glass substrates. Differences in fluid composition, including proteins and small molecules, resulted in spectral differences. Venous and menstrual blood is differentiated by the peak at 1039 cm^?1 attributed to phosphoric acid found in menstrual blood. Peak intensity is influenced by the porosity and weave of the substrate fabric.     

Adenoid Cystic Carcinoma of the Trachea Resulting in Fatal Asphyxia

Primary malignant tumors of the trachea are uncommon. The authors report a case of a 72‐year‐old female who died from asphyxia due to an undiagnosed obstructing adenoid cystic carcinoma of the trachea. The decedent became unresponsive while eating cereal and was pronounced upon arrival at the local hospital. The autopsy revealed a near occlusive tumor mass just superior to the bifurcation of the distal trachea. There was no evidence of aspiration. The death was the result of asphyxia due to obstruction of the trachea by an adenoid cystic carcinoma. This case demonstrates that an obstructive tumor mass may remain undiagnosed until an obstructive episode results in a sudden death.     

The Effect of Decomposition on the Efficacy of Biometrics for Positive Identification

Biometrics, unique measurable physiological and behavioral characteristics, are used to identify individuals in a variety of scenarios, including forensic investigations. However, data on the longevity of these indicators are incomplete. This study demonstrated that iris and fingerprint biometric data can be obtained up to four days postmortem in warmer seasons and 50 + days in the winter. It has been generally believed, but never studied, that iris recognition is only obtainable within the first 24 hours after death. However, this study showed that they remain viable for longer (2–34 days) depending upon the environmental conditions. Temperature, precipitation, insects, and scavenger activity were the primary factors affecting the retention of biometrics in decomposing human remains. While this study is an initial step in determining the utility of physiological biometrics across postmortem time, biometric research has the potential to make important contributions to human identification and the law enforcement, military, and medicolegal communities.     

Actions Necessary to Prevent Childhood Obesity: Creating the Climate for Change

Childhood obesity has become a public health epidemic, and currently a battle exists over how to frame and address this problem. This paper explores how public policy approaches can be employed to address obesity. We present the argument that obesity should be viewed as the consequence of a "toxic environment" rather than the result of the population failing to take enough "personal responsibility." In order to make progress in decreasing the prevalence of obesity, we must shift our view of obesity away from the medical model (which focuses on the individual) to a public health model (which focuses on the population). At the same time, we must be sensitive to the problem of weight bias. Potential obstacles to taking a public policy approach are identified, as well as suggestions on how to overcome them.