Reliability of SE33 typing by capillary electrophoresis

A ladder of 24 ACTBP2 (SE33) alleles was separated 175 times by denaturing capillary electrophoresis on an ABI Prism 310 Genetic Analyzer using polymer POP-4. The mean standard deviation of fragment size determination was 0.083 bp. Fragments in the whole allelic range of ACTBP2 could be typed with high precision and reproducibility if adjacent fragments differed by at least two nucleotides. The capacity of resolving 1 bp differences was tested by repeatedly running a ACTBP2*14.2/14.3/31.2/31.3 allelic mixture. The 14.2/14.3 fragment pair could be separated in 98%, the 31.2/31.3 fragment pair only in 65% of all runs. Reliable separation of this difficult fragment mixture could exclusively achieved by using POP-6.     

Systematic study on STR profiling on blood and saliva traces after visualization of fingerprint marks

This paper describes a systematic study of the influence of optical, physical, and chemical methods used for fingerprint enhancement on subsequent DNA analysis of biological stains. Latent fingerprints as well as fingerprints in contact with blood and saliva on different surfaces were treated with dactyloscopic methods. As a general finding, subsequent STR profiling of the blood/saliva traces led to good results after all the enhancement methods included in this study. Concerning blood enhancement procedures, the airbrush technique showed deleterious effects on subsequent STR analysis in some cases. We therefore recommend the implementation of the layer technique, as it brings advantages for fingerprint enhancement as well. It could also be shown that, as can be necessary in practical casework, two enhancement methods can be performed on a single stain without having influence on STR profiling. In terms of methodological variety, this paper reflects a comprehensive study performed on STR profiling after fingerprint enhancement methods, including rare methods and variations of techniques, which can be a useful alternative in certain case scenarios.     

LC-MS/MS analysis of pholedrine in a fatal intoxication case

Pholedrine (4'-hydroxymethamphetamine) is a cardiovascular agent exerting hypertensive and adrenergic effects. High doses may cause a drop in the peripheral circulation blood flow and increase blood pressure, heart rate and body temperature up to a state of central respiratory paralysis. A 15-year-old girl who suffered from heavy agitation and hallucinations was admitted to the intensive care unit in a comatose state. The clinical findings included a maximum heart rate of 170 bpm and a body temperature of 43.8 degrees C. Resuscitation measures were in vain and abandoned after approximately 2h. A toxicological emergency analysis using GC/MS revealed a considerable amount of pholedrine in blood and urine. A method for determining pholedrine in human body fluids utilizing high-performance liquid chromatography (HPLC)/tandem mass spectrometry (LC-MS/MS) with a turbo ion-spray source was developed, using D11-methamphetamine and D5-methylenedioxymethamphetamine as internal standards. Samples were prepared by SPE extraction using SPEC-C18AR/MP3((R)) columns, which yielded the best extraction recovery (67%). Chromatographic separation was achieved at pH 5 on an RP-18 stationary phase applying gradient elution from 50 to 70% of B (methanol/acetonitrile 3/1 (v/v), 0.02% acetic acid) in A (5mM ammonium acetate/acetonitrile 95/5 (v/v), 0.02% acetic acid). Supra-pure acetic acid was added to the post-column effluent with a flow rate of 0.2 microl/min to optimize ionization. Detection was carried out in the positive ionization, multiple reaction monitoring (MRM) mode. The chromatograms showed no interference from other substances. The limit of detection (LOD, S/N=3) of pholedrine was 0.8 ng/ml and its lower limit of quantification (LLOQ, S/N=10) 3ng/ml. The calibration curve was linear (r=0.999) in the range 1-100 ng/ml. Samples with higher concentrations were diluted to suit the working range. The intra-day R.S.D. between 5 and 80 ng/ml were 3.8-8.7% and the inter-day R.S.D. between 5 and 100 ng/ml were 6.7-10.7%. The pholedrine concentrations in blood and urine collected when the girl was still alive were 16.1 microg/ml (R.S.D. 10.5%) and 1120 microg/ml (R.S.D. 8%), respectively. In post-mortem samples, they were 23.0 microg/ml (R.S.D. 5.1%) in heart blood and 27.3 microg/g (R.S.D. 6.6%) in the liver.     

The violent female perpetrator and her victim

The aim of the present study was to examine the relationship between violent female offenders and their victims as well as the putative differences in the motives and specific psychological factors among three groups of female offenders: women who have victimised someone closely related to them, those who have victimised an acquaintance and lastly women who have victimised a stranger. More than half (N=61) of all violent female offenders hospitalised or incarcerated in Finland during the year of study were interviewed and assessed by Structured Clinical Interview II for DSM-IV (SCID-II) and Hare's Psychopathy Checklist-Revised (PCL-R). In 34% of the cases the victims were persons close to the offender, in 41% the victims were acquaintances and in 25% strangers. The victims in homicide offences were more often both male and closer to the perpetrator than in assault offences. Although motives were related to interpersonal problems, self-defence and long-term physical or psychological abuse were reported by only a few women, even for the small proportion of women whose victims were intimate partners. The most frequent reason for offences stemmed from confrontational situations in connection with alcohol use. Women who victimised acquaintances and strangers were also more likely to have a history of criminality and substance abuse than women who victimised those in close personal relationships. The latter were also more likely to have an antisocial personality disorder (PD) and psychopathic characteristics. There were, however, no significant differences found between those who had experienced physical or psychological abuse in childhood or adulthood and those who had no adverse experiences. These findings suggest that the violent behaviour by females leads more often to the death of the victim, when the victim is closely related to the perpetrator. The commonly-held view that violent female offending occurs primarily as a consequence of precipitation by the victim was not supported.     

Mitochondrial profiling of dog hairs

In order to make greater use of dog hairs as forensic evidence, we have developed a robust method for duplex amplification of adjacent 306 and 332bp amplicons within the 5' hypervariable region (5' HVR) of the canine mitochondrial control region. In support of this, a 595bp region covering 35 polymorphic sites has been sequenced from the blood of 105 UK dogs. In total, 30 different haplotypes were observed, 13 only once whilst the commonest was seen 14 times; the overall exclusion capacity is 0.929. One animal was heteroplasmic in blood for a single base deletion and showed phenotypes ranging from near complete deletion to a predominance of the base among a sample of 12 hairs. In contrast, no evidence of heteroplasmy was seen in single hairs from 20 dogs which were not visibly heteroplasmic in blood. Phylogenetic analysis and comparisons with other published databases highlighted instances of possible recurrent mutation which may be relevant when interpreting single base differences between samples.     

Accidental autoerotic deaths between 1978 and 1997. Institute of Legal Medicine, Medical School Hannover

Between 1978 and 1997 the Institute of Legal Medicine of the Hannover Medical School examined 17 fatal autoerotic deaths. The incidence for the Hannover region was 0.49 cases per million inhabitants per year. The victims included 17 men with an average age of 36.8 years; a peak in the age distribution was seen between 20 and 29 years. Twelve of the men were found by friends or family in a domestic environment, while other situations in which the victims were found included the victim's own car, a hotel room, a canal embankment, a public parking lot as well as the holding cell of the youth detention center. The men were of varying socioeconomic status and held a number of different types of jobs or still attended school. Five of the men were found completely nude, while five were only undressed below the waist. Four men wore women's clothes and two were fully clothed with exposed genitals. Besides women's clothes, other objects found at the scene included various types of sexual aids, including ropes, chains, metal bars, locks, sex magazines, condoms, plastic bags, rubber items, etc. In four cases blood alcohol levels between 0.1 and 2.5 per thousand (urine alcohol levels between 0.2 and 2.5 per thousand ) were found. Toxicologic examination revealed chloroform, ketamine, a propane-butane gas mixture in one case each, and in two cases cocaine and morphine. Causes of death included central paralysis after strangulation (seven cases), asphyxiation (4), subarachnoid hemorrhage (2), intoxication (1), hypothermia (1), left heart failure (1), and drowning (1). The history, findings at scene, and autopsy findings and, in individual cases, other investigations are of utmost importance to accurately reconstruct a fatal autoerotic accident.     

Co-amplification of ENFSI-loci D3S1358, D8S1179 and D18S51: validation of new primer sequences and allelic distribution among 2874 individuals

The present communication presents a new triplex PCR co-amplifying three loci (D3S1358, D8S1179 and D18S51) recommended for STR typing by the European Network of Forensic Science Institutes (ENFSI). Twenty-two different primers were tested to optimise the PCR. Four of the six primer sequences finally chosen were self selected, the fifth was a published one and the sixth derived from a commercially available multiplex kit. Using this PCR-setup, even minimum amounts of genomic DNA are sufficient to analyse the STR loci D3S1358, D8S1179 and D18S51 in parallel. Especially in forensic casework, where DNA is mostly limited and often contaminated with enzyme inhibitors, this new PCR proved to be very advantageous. To demonstrate the reliability, buccal swabs from 2874 persons were typed not only with the new triplex PCR but also with a commercially available multiplex kit.     

Les liaisons dangereuses: Relations between police commissioners and their political masters

This article reflects on the difficult and ambiguous relationship between Australian Police Commissioners and their political masters. The article looks at South Australia, Queensland and New South Wales and examines the nature of the conflict arising in these jurisdictions from the ambiguous nature of the roles Police Commissioners and Ministers are expected to play. In exploring the uncertainties and expectations that surround the Police Commissioner–Minister relationship, the article considers what lessons can be drawn from such examples. The article reflects on the political and social ramifications of such altercations and considers ways of managing future conflict.