Detection of semen in stains on material evidences by quantitative immunofluorescence test

Russian and foreign methods used in forensic medicine for detection of the semen in stains on material evidences are compared. The potentialities of quantitative immunofluorescence test for detection of the semen in stains on material evidences, developed at Bureau for Forensic Medical Expert Evaluations of the Leningrad region, are described. Unlike other methods used in Russia, this method detects the semen in stains in the absence of spermatozoa and in stains with very low amount of the semen. Our modification allows objective recording of the results with computer processing. The method is cheaper than its foreign analogs and its sensitivity is similar to them.     

Reflections: the challenge of biotechnology and public policy

Rapid developments in the area of biotechnology within the next decade are likely to have a significant impact on Canadian society. This article outlines the practical and ethical issues that will need to be addressed in the face of scientific advances, and contemplates the development of an appropriate policy framework in this regard. Surveying the approaches to policy development taken thus far, the author notes the underlying need for greater transparency and public participation. Rational and effective policies will only result from additional basic scientific data being made available to a more informed and engaged Canadian public.     

Comparative analysis fo heroin

A protocol for comparative analysis of heroin making use of chromatographic methods and infra-red spectroscopy is presented.     

Arterial-esophageal fistulae in patients requiring nasogastric esophageal intubation

A rare and potentially fatal cause of hematemesis is fistula formation between the esophagus and the vascular system. A case report of a 39-year-old woman with congenital aortic arch anomalies hospitalized for treatment of head injuries demonstrates the potential for iatrogenic esophageal trauma to initiate fistula formation between the esophagus and an anomalous arterial system. A literature review revealed 6 other cases of vascular-esophageal fistulae caused by nasogastric esophageal intubation. It is concluded that aortic arch anomalies increase the risk of esophageal injury and subsequent fistula formation from nasogastric esophageal intubation. In addition, the clinical features and pathologic findings of vascular-esophageal fistulae are reviewed.     

Unexpected childhood death due to hemolytic uremic syndrome

Two cases of unexpected childhood death due to hemolytic uremic syndrome are reported. A 21-month-old girl who was discovered dead in bed following a short illness was found at autopsy to have overwhelming sepsis resulting from transmural colitis. Escherichia coli serotype 0157A was isolated from the intestine, and renal changes of hemolytic uremic syndrome were found. A 4-year-old girl died suddenly in hospital from intracranial hemorrhage while being treated for hemolytic uremic syndrome-related renal failure. Culture of urine and feces grew verocytotoxin producing E. coli. These cases demonstrate that hemolytic uremic syndrome may be a rare cause of unexpected childhood death and that the diagnosis may not be established prior to autopsy. Postmortem culture of tissues and fluids in cases of suspected sepsis in children may be essential in establishing this diagnosis, because histologic evaluation may be compromised by profound sepsis and tissue putrefaction. Accuracy in diagnosis may have significant public health and medicolegal consequences.     

Empathy and Jurors' Decisions in Patricide Trials Involving Child Sexual Assault Allegations

In a mock-trial paradigm, 205 participants considered a patricide trial in which a child defendant claimed the patricide was done in self-defense after years of sexual abuse. Participants in an empathy-induction condition were asked to take the perspective of the defendant and to detail how they would be thinking and feeling if they were the defendant. Control condition participants received no such instructions. Results indicated that, compared to jurors in the control condition, jurors who were asked to take the defendant's perspective had more empathy for the defendant (without feeling more similar to or more sympathy for the defendant), found the defendant less guilty and less responsible for the murder, and were more likely to consider abuse to be a mitigating factor in the killing. Overall, compared to men, women were more likely to believe the defendant's abuse allegations, find the defendant credible, and consider the defendant to be less responsible for the murder. Women in the empathy condition found the defendant less guilty than did all other jurors. Finally, child defendant gender was also varied, but this had few effects on case judgments overall. Jurors, however, were more likely to believe that the girl defendant was sexually abused than the boy defendant. We discuss theoretical implications for understanding the social psychological construct of empathy as well as implications for understanding jurors' decisions in cases involving child sexual assault allegations.