An unusual case of suicidal double ligature strangulation.

As suicide by ligature strangulation is rare, the correct medico-legal diagnosis may be difficult to establish if there is no clear supporting circumstantial evidence. We report an unusual case of suicide by strangulation with a double ligature. Investigation of the scene of death and pathological findings at autopsy are reported and discussed. We emphasise the importance of an external examination and an on-the-spot investigation.

[Regulatory aspects and medicolegal considerations regarding clinical drug trials]. / Aspetti normativi e considerazioni medico-legali sulla sperimentazione farmacologica clinica.

This article aims to explore the regulatory and medicolegal aspects of experimental drug trials. Firstly, the authors provide definitions of drug according to WHO, the European Community and our official Pharmacopoeia, and that of experimental studies. They then explain the distinction between pure or basic research and drug trials and explain the various phases of the latter. Besides providing definitions, and exploring doctrinal, theoretical but also practical aspects of drug trials, the authors also discuss and analyze legislative aspects, with particular reference to the Italian legislative framework, and medicolegal issues, including informed consent, effects on humans, and professional responsibility.

A case of "precocious" mummification.

Mummification is a peculiar transformative process consisting of the total drying of the body soft tissues. It is produced, in particular conditions, between 6 and 12 months after death. "Precocious" mummification has been reported in countries where recorded weather conditions are more extreme than in Italy, in a confined environment, or with particular micro-climate conditions. Here we present a case of mummification produced in a central region of Italy in four weeks. We also analyze conditions allowing for the rapidity of this phenomenon.

Differential diagnosis between cranial fractures of traumatic origin and explosion fractures in burned cadavers.

Interpreting the damages on a cadaver which has been exposed to the action of fire is a challenge for the forensic pathologist. The finding of a burned body gives in fact the opportunity to make a series of inquiries which deal with the whole medical-legal practice. In our case, the victim has been hit over the head with a blunt object and has been then carbonized. The medical-legal problems implied lie in the definition of the exact manner and cause of death, and therefore in the analysis of vital, perimortal and postmortal injuries, as to formulate a differential diagnosis between the former traumatic originated and the latter caused by combustion.

Aortic dissection and cocaine use.

Most of the cocaine - deaths are said to be related to cardiovascular complications. This paper addresses a rather infrequent complication of chronic cocaine use, represented by the aortic dissection. The case in point pertains to a 45-year-old, caucasian male, substance abuser who suffered an aortic dissection following the use of cocaine. Blood concentrations of cocaine and benzoylecgonine were considered not to be within a potentially toxic range.

Frequency assessment of 25 SNPs in five different populations.

Allele and genotype frequencies of 25 SNPs previously selected and validated for forensic purposes were assessed in 250 unrelated individuals originating from five different countries of Europe (Spain, Croatia, Bulgaria, Turkey and Serbia). All the SNPs generated extremely low F(st) values confirming our previous results on Italian, African (Benin) and Asian (Mongolian) populations. As a consequence of such F(st) values we observed similar values of random match probability across the populations: 2.26 x 10(-10) in the Spanish population, 2.13 x 10(-10) in the Croatian population, 4.21 x 10(-10) in the Bulgarian population, 2.52 x 10(-10) in the Serbian population and 1.46 x 10(-10) in the Turkish population.

Identification from chest x-rays: reliability of bone density patterns of the humerus.

A critical review of Kahana and Hiss' study on identification from bone trabecular pattern and a test of their method conducted on the humerus are presented. Bone trabecular pattern was studied through the generation of a numerical file representing the gray scale. Using the correlation coefficient, several pairwise comparisons between numerical files were performed. The test gave nearly 30% of incorrect exclusions (the method did not recognize couples of radiographs belonging to the same subject) and 50% of misidentifications (the method recognized couples of radiographs belonging to different subjects, as belonging to the same subject); therefore, this research shows that at the present time, it is not possible to safely quantify identification through bone density patterns, of the proximal humerus taken from thoracic X-rays. Thus, an "easy"-but dangerous-use of trabecular density patterns on this specific type of radiogram as an identification method should be currently avoided.

Forensic DNA challenges: replacing numbers with names of Fosse Ardeatine's victims.

The Fosse Ardeatine massacre was a mass execution carried out in Rome on March 24, 1944 by Nazi German occupation troops during the Second World War as a reprisal for a partisan attack conducted on the previous day in central Rome. The 335 civilians were taken to the "Cave Ardeatine" and they were shot. Only 323 corpses out of 335 have been identified. The aim of this work is the genetic and anthropological analysis of the remains exhumed from grave number 329 of Fosse Ardeatine's Shrine to assess their identity. So far, such remains have been supposed to belong to MM but mitochondrial analysis excluded a biological relationship to two living maternal relatives. Our analysis indicated that remains recovered in grave number 329 do not belong to MM. This result suggests that genetic analysis of the remains should be also applied to the other 12 unknown corpses to elucidate their identity.

Whole genome amplification and real-time PCR in forensic casework.

BACKGROUND: WGA (Whole Genome Amplification) in forensic genetics can eliminate the technical limitations arising from low amounts of genomic DNA (gDNA). However, it has not been used to date because any amplification bias generated may complicate the interpretation of results. Our aim in this paper was to assess the applicability of MDA to forensic SNP genotyping by performing a comparative analysis of genomic and amplified DNA samples. A 26-SNPs TaqMan panel specifically designed for low copy number (LCN) and/or severely degraded genomic DNA was typed on 100 genomic as well as amplified DNA samples. RESULTS: Aliquots containing 1, 0.1 and 0.01 ng each of 100 DNA samples were typed for a 26-SNPs panel. Similar aliquots of the same DNA samples underwent multiple displacement amplification (MDA) before being typed for the same panel. Genomic DNA samples showed 0% PCR failure rate for all three dilutions, whilst the PCR failure rate of the amplified DNA samples was 0% for the 1 ng and 0.1 ng dilutions and 0.077% for the 0.01 ng dilution. The genotyping results of both the amplified and genomic DNA samples were also compared with reference genotypes of the same samples obtained by direct sequencing. The genomic DNA samples showed genotype concordance rates of 100% for all three dilutions while the concordance rates of the amplified DNA samples were 100% for the 1 ng and 0.1 ng dilutions and 99.923% for the 0.01 ng dilution. Moreover, ten artificially-degraded DNA samples, which gave no results when analyzed by current forensic methods, were also amplified by MDA and genotyped with 100% concordance. CONCLUSION: We investigated the suitability of MDA material for forensic SNP typing. Comparative analysis of amplified and genomic DNA samples showed that a large number of SNPs could be accurately typed starting from just 0.01 ng of template. We found that the MDA genotyping call and accuracy rates were only slightly lower than those for genomic DNA. Indeed, when 10 pg of input DNA was used in MDA, we obtained 99.923% concordance, indicating a genotyping error rate of 1/1299 (7.7 x 10(-4)). This is quite similar to the genotyping error rate of STRs used in current forensic analysis. Such efficiency and accuracy of SNP typing of amplified DNA suggest that MDA can also generate large amounts of genome-equivalent DNA from a minimal amount of input DNA. These results show for the first time that MDA material is suitable for SNP-based forensic protocols and in general when samples fail to give interpretable STR results.