Is there a place for hair analysis in doping controls?

The actual antidoping control rules applied in sports (as established by the International Olympic Committee and the International Sport Federations) state that a positive case is chemically established by the unequivocal detection of a forbidden parent molecule and/or any of its metabolite(s) in urine, no matter the amounts which were administered and when the drug was taken. Screening is accomplished most of the time by using GC-MS procedures. These have been optimized to detect most if not all of the forbidden compounds which are put on a list. Recently, attempts have been made on scalp hair to demonstrate the value of this matrix as a possible means for differentiating between therapeutic use and doping abuse. In particular, GC-mass selective detector and GC-high resolution MS were successfully applied to treated animals and body-builders for anabolic agents (steroids and beta-2-agonists) at high sensitivity detection (low ng/g level). Naturally occurring molecules, like testosterone and its metabolites, could also be differentiated from their synthetic counterparts. Positive cases are more often challenged in courts and retrospectivity in time of the drug(s) intake is becoming an important issue for evaluating the responsibility of the person. This is can be based on hair analyses if the drugs have been taken at regular intervals. Stimulants and narcotics are often used in sports like drug of abuse in the ordinary social contexts. On the other hand, anabolic agents, when taken to improve the physical performances, follow complex regimens with the mixing of various formulas and dosages. Scalp hair references ranges for these as well as for endogenous substances still wait to be established statistically for competing, well-trained athletes. The incorporation rate into blond or gray hair is poorer than that of dark colored hair raising the question of individuals equality against the controls, a very important matter of concern for the sport's governing bodies. The frequency of hair cutting and short hair cuts necessary to gain speed in specific sports like swimming are other critical factors. On the other hands, irregular hair growth, associated with the washout effect through multiple washing and staining processes over expanded time intervals can cause concentrating or diluting effects. So far, a minority of prohibited substances could be detected in scalp hair with the sensitivity and specificity required in the context of the sport's activities. From the above, clear limitations of the usefulness of hair analysis in doping control analysis are obvious until a lot more data relevant to this particular field have been collected.     

Identification of the human Y-chromosomal microsatellite locus DYS19 from degraded DNA

STR DYS19 seems to be one of the most useful markers for population genetic, evolutionary, and forensic applications. However, the authors have noticed that the amplification of the DYS19 polymorphism fails when highly degraded DNA is used as a template. The authors designed a new pair of primers that reduce the DYS19 fragment sizes compared with those of the known protocol. Using these primers, an improved success rate can be achieved, particularly when putrefied samples are under investigation.     

A replication study of obsessional followers and offenders with mental disorders

The purpose of this study was to compare certain demographic, clinical, and criminal variables within subgroups of obsessional followers, and compare them to a group of offenders with mental disorders to attempt to replicate earlier findings. A static group archival design utilized a non-random group of convenience and a randomly selected comparison group. Sixty-five obsessional followers and 65 offenders with mental disorders were evaluated by psychiatrists and psychologists for court ordered reasons during their criminal proceedings. Both groups were evaluated during the same period, in the same court diagnostic clinic, and generally for sentencing determinations. The obsessional followers were measured on demographic, diagnostic, pursuit, victim, threat, violence, emotional, motivational, and defense variables. Inferential comparisons that used parametric and nonparametric statistics were done within and between groups on select variables. The obsessional followers had significantly greater estimated IQ than the offenders with mental disorders, but were neither older nor better educated. There were no significant differences in the high prevalence of both DSM-IV Axis I and II diagnoses. Obsessional followers who stalked prior sexual intimates were significantly more likely to have a substance abuse or dependence diagnosis. Obsessional followers who stalked strangers or acquaintances were more likely to be delusional. The majority of the obsessional followers, primarily motivated by anger, both threatened and were violent toward person or property. The modal obsessional follower is an average or above IQ, unemployed, unmarried male in his fourth decade of life. chronically pursuing a prior sexually intimate female. He is diagnosed with substance abuse or dependence and a personality disorder NOS, and has a prior psychiatric, criminal and substance abuse history. He is angry, likely to threaten her, and assault her person or property without causing serious injury.     

Diagnostic values of polysomnography in forensic medicine

A man accused of a first-degree murder of a two-year-old girl claimed that he had not been conscious during the time of the alleged murder. The possibility that he may have committed the crime while "sleepwalking" was raised. The forensic psychiatrist looked to the sleep disorders facility to conduct polysomnographic investigation of the accused in order to investigate the possibility that he had a parasomnia. Overnight sleep recordings with video surveillance carried out for two consecutive nights showed no evidence of parasomnia. On the basis of the full assessment, the final report of the forensic psychiatrist did not support a legal defense of non-insane automatism and "sleepwalking" was withdrawn as a possible defense by the lawyer of the accused.     

Alcohol in a series of medico-legally autopsied deaths in northern Norway 1973-1992

It is well established that use of alcohol increases the risk of fatal injuries. The presence of blood alcohol in autopsied deaths is regularly encountered in medico-legal practices. The aim of this study was to investigate the prevalence and concentration of alcohol in 1539 medico-legal autopsies in two counties in northern Norway in the period 1973-1992, and the reporting of acute alcohol influence among these deaths to the official cause-of-death statistics. Blood alcohol concentration (BAC) >/=0.5 per thousand (50 mg/100 ml) was found in 47.6% (n=456) of violent deaths tested, and in 93% (n=426) of these the BAC was >/=1.0 per thousand. In 17.4% (n=55) of tested natural deaths the BAC was >/=0.5 per thousand. Acute alcohol-influenced violent deaths were under-reported to the cause-of-death statistics. Deaths by motor vehicle traffic accidents did not differ from other violent deaths in this respect. The under-reporting among violent deaths was 41% in cases with BAC >/=0. 5 per thousand and 37% where the BAC was >/=1.0 per thousand during the whole period. It is concluded that post-mortem BAC >/=0.5 per thousand, should be regarded as a possible contributory cause in all violent deaths, and reported accordingly.     

A new method for the evaluation of matches in non-recombining genomes: application to Y-chromosomal short tandem repeat (STR) haplotypes in European males

A 9-locus microsatellite framework (minimal haplotype), previously developed for forensic purposes so as to facilitate stain analysis, personal identification and kinship testing, has been adopted for the establishment of a large reference database of male European Y-chromosomal haplotypes. The extent of population stratification pertaining to this database, an issue crucial for its practical forensic application, was assessed through analysis of molecular variance (AMOVA) of the 20 regional samples included. Despite the notion of some significant haplotype frequency differences, which were found to correlate with known demographic and historic features of Europeans, AMOVA generally revealed a high level of genetic homogeneity among the populations analyzed. Owing to their high diversity, however, accurate frequency estimation is difficult for Y-STR haplotypes when realistic (i.e. moderately sized) datasets are being used. As expected, strong pair-wise and higher order allelic associations were found to exist between all markers studied, implying that haplotype frequencies cannot be estimated as products of allele frequencies. A new extrapolation method was therefore developed which treats haplotype frequencies as random variables and generates estimates of the underlying distribution functions on the basis of closely related haplotypes. This approach, termed frequency 'surveying', is based upon standard population genetics theory and can in principle be applied to any combination of markers located on the Y-chromosome or in the mitochondrial genome. Application of the method to the quality assured reference Y-STR haplotype database described herein will prove very useful for the evaluation of positive trace-donor matches in forensic casework.     

Expression of adhesion molecules in skin wounds: diagnostic value in legal medicine

The adhesion molecules identified in recent years can help improve the diagnosis of the wound age, especially of injuries with a short survival time. This is also indicative of the vitality of the wounds. The material investigated in the study originated from 465 skin wounds. The samples were taken from human autopsy material, during the surgical treatment of wounds (excision) of patients and from experimental incised wounds of mice. To judge the age of skin wounds the endothelial adhesion molecules were detected in paraffin sections after autoclaving and using the ABC technique. Human skin wounds: strong positive staining was observed of ICAM-1 1.5 h at the earliest and 3.5 days at the latest, for the P-selectin 3 min at the earliest and 7 h at the latest, for the E-selectin 1 h at the earliest and 17 days at the latest and for VCAM-1 3 h at the earliest and 3.5 days at the latest after the time of injury. The L-selectin was expressed constitutively. Mice skin wounds: strong positive immunohistochemical reactions were found as a rule earlier than in human skin wounds. The detection of an increased expression of ICAM-1, VCAM-1 and P- and E-selectins can improve the wound age assessment in injuries with short survival times.