Interaction between carbon monoxide and ethanol in fire fatalities.

Impairment due to ethanol is clearly a risk factor in deaths due to fire. However, it is less clear whether there is a physiological interaction between ethanol and carbon monoxide (CO) that would alter the carboxyhemoglobin saturation level (COHb sat.) that accounts for death. In an attempt to explore this issue further, 196 fire fatalities investigated by the Office of the Chief Medical Examiner, State of Maryland over a 3-year period were examined. COHb sat. and blood ethanol concentrations (BAC) were tabulated. Twelve cases positive for therapeutic or abused drugs other than lidocaine or atropine were excluded; 184 cases were included. The data indicate that ethanol does not affect the COHb sat. that accounts for death, since the percentage of cases positive for ethanol at a given COHb range shows no trends. Therefore, we conclude that although ethanol remains a risk factor in fire fatalities, the risk appears to be related to the impairment that it produces as opposed to a direct interaction with CO.     

Comparison of point-of-collection screening of drugs of abuse in oral fluid with a laboratory-based urine screen.

Oral fluid is becoming increasingly useful for the detection of drugs, since it is a non-invasive specimen to collect and, because collection is directly observed, it is difficult to adulterate. A point-of-collection (POCT) oral fluid drug analysis kit has been developed for use in many drug testing situations. This paper summarizes the results of field evaluations of the ORALscreen System for screening of drugs in oral fluid. The ORALscreen System consists of an oral fluid collection device and a test device containing a lateral flow membrane immunoassay system. Paired samples (oral fluid and urine) were collected from drug users and the results from the ORALscreen POCT system were compared to urine screening results conducted in a licensed laboratory. The results demonstrate that the ORALscreen System has excellent percent agreement with the laboratory-based urine screening test results for the detection of cocaine and opiates through 2.5-3 days following drug use, respectively. Tetrahydrocannabinol (THC) was detected by ORALscreen on the day of use and 1 day after use. Good correlation between urine and oral fluid screening results was observed for the methamphetamine positive samples; however, the number of days following drug use was not determined.     

The recovery of latent fingermarks and DNA using a silicone-based casting material

There are many techniques available for the recovery of fingermarks at scenes of crime including the possibility of taking casts of the marks. Casts can be advantageous in cases where other destructive recovery techniques might not be suitable, such as when recovering finger marks deposited on valued or immobile items. In this research, Isomark (a silicone-based casting material) was used to recover casts of finger marks placed on a variety of substrates. Casts were enhanced using cyanoacrylate fuming. Good quality marks were successfully recovered from a range of smooth, non-porous surfaces. Recovery from semi-porous surfaces was shown to be inefficient. DNA was subsequently extracted from the casts using QIAamp Mini extraction kits, amplified and profiled. Full DNA profiles were obtained 34% of samples extracted.     

Child Medical Evaluation Program: a statewide system for the medical and mental health evaluation of abused and neglected children

The Child Medical Evaluation Program examines 1500 children per year suspected by county social service departments of having subtle physical evidence of abuse or neglect. The program utilizes private practitioners, primarily pediatricians, in a systematic manner and provides consultation, direction, and quality control. The system is a unique, cooperative effort between private practitioners and county departments of social service. It is administered from a state university department of pediatrics. The cost is low, government involvement minimal, and the service extensive. The system is recommended to other states.     

Male and female reasoning biases and offending behavior

Although the majority of the general population decides not to offend, a significant proportion decides otherwise. The research presented in this article explores whether offenders reason in manners that are comparable with a non-offender population, or if their decision to offend may be a consequence of inappropriate reasoning strategies. Psychologists have observed systematic deviations from logical predictions of reasoning behavior on a variety of tasks and that content specific information can have marked effects on reasoning behavior. Established reasoning tasks were adapted for use in a crime specific context to examine whether such biases were apparent in an offender population. Moreover, given a paucity of research into gender differences, the research conducted balanced for gender in a methodologically rigorous design. Data suggested that reasoning biases found with non-offender populations extended to an offender population and some interactions by gender and by offender group were noted. Implications of the results are discussed with suggestions on how the research may be extended and implications for policy.     

A rapid method for the determination of cocaine in brain tissue.

A rapid procedure is described for the extraction and analysis of brain samples for cocaine and benzoylecgonine. Human brain tissue was sectioned at autopsy, and samples were subjected to a lipase digestion, subsequent to solid-phase extraction. The distribution of cocaine and benzoylecgonine throughout different regions of the brain was determined by high-performance liquid chromatography.