scholarly journals Microbial neoformation of volatiles: implications for the estimation of post-mortem interval in decomposed human remains in an indoor setting

2020 ◽  
Vol 135 (1) ◽  
pp. 223-233
Author(s):  
Ann-Sofie Ceciliason ◽  
M. Gunnar Andersson ◽  
Emma Lundin ◽  
Håkan Sandler
Keyword(s):  
Femoral Vein ◽  
Human Remains ◽  
Common Finding ◽  
Post Mortem ◽  
Degree Days ◽  
Post Mortem Interval ◽  
Total Body Score ◽  
Total Body ◽  
Pmi Estimation ◽  
Accumulated Degree Days

AbstractThe objective of this study was to determine if a relationship between microbial neoformation of volatiles and the post-mortem interval (PMI) exists, and if the volatiles could be used as a tool to improve the precision of PMI estimation in decomposed human remains found in an indoor setting. Chromatograms from alcohol analysis (femoral vein blood) of 412 cases were retrospectively assessed for the presence of ethanol, N-propanol, 1-butanol, and acetaldehyde. The most common finding was acetaldehyde (83% of the cases), followed by ethanol (37%), N-propanol (21%), and 1-butanol (4%). A direct link between the volatiles and the PMI or the degree of decomposition was not observed. However, the decomposition had progressed faster in cases with microbial neoformation than in cases without signs of neoformation. Microbial neoformation may therefore act as an indicator of the decomposition rate within the early decomposition to bloating stages. This may be used in PMI estimation based on the total body score (TBS) and accumulated degree days (ADD) model, to potentially improve the model’s precision.

scholarly journals Comparison of Accumulated Degree-Days and Entomological Approaches in Post Mortem Interval Estimation

Insects ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 264
Author(s):  
Lorenzo Franceschetti ◽  
Jennifer Pradelli ◽  
Fabiola Tuccia ◽  
Giorgia Giordani ◽  
Cristina Cattaneo ◽  
...  
Keyword(s):  
Interval Estimation ◽  
Post Mortem ◽  
Degree Days ◽  
Post Mortem Interval ◽  
Total Body Score ◽  
Total Body ◽  
Death Investigation ◽  
Indoor Conditions ◽  
Medicolegal Death Investigation ◽  
Accumulated Degree Days

Establishing the post mortem interval (PMI) is a key component of every medicolegal death investigation. Several methods based on different approaches have been suggested to perform this estimation. Among them, two methods based their evaluation on the effect of the temperature and time on the considered parameters: total body score (TBS)/accumulated degree-days (ADDs) and insect development. In this work, the two methods were compared using the results of minPMI and PMI estimates of 30 forensic cases occurring in northern Italy. Species in the family Calliphoridae (Lucilia sericata, Calliphora vomitoria and Chrysomya albiceps) were considered in the analyses. The results highlighted the limits of the TBS/ADD method and the importance of the entomological approach, keeping in mind that the minPMI is evaluated. Due to the fact that the majority of the cases occurred in indoor conditions, further research must also be conducted on the different taxa to verify the possibility of increasing the accuracy of the minPIM estimation based on the entomological approach.

scholarly journals Post-mortem Interval Estimation in a Forensic Case with Two Predatory Species: Chrysomya albiceps and Synthesiomyia nudiseta

2021 ◽  
Vol 6 (1(Special)) ◽  
pp. 148
Author(s):  
Tania Ivorra ◽  
Anabel Martínez-Sánchez ◽  
Salvador Giner Alberola
Keyword(s):  
Interval Estimation ◽  
Post Mortem ◽  
Degree Days ◽  
Se Spain ◽  
Predatory Behaviour ◽  
Chrysomya Albiceps ◽  
Post Mortem Interval ◽  
Forensic Case ◽  
The Town ◽  
Accumulated Degree Days

A forensic case in which two facultative predatory species were found together on a human corpse is presented in this work. Second and third instar larvae of Synthesiomyia nudiseta (van der Wulp, 1883) (Diptera: Muscidae) and Chrysomya albiceps (Wiedemann, 1819) (Diptera: Calliphoridae) were collected from the dead body of a man on 14th November 2019, but puparia in the autopsy pictures were observed after, but not collected. The corpse was found on the terrace of the third floor of a building located in the town of Elche (SE Spain), and the pathologist confirmed the death as natural. The minimum post-mortem interval was estimated by the time to reach the length of the collected larvae or to reach the pupal developmental stage (in days and accumulated degree-days). In accordance with the influence of the predatory behaviour of each of these species on the developmental data of the other, as described in the existing literature, the effect of a hypothetical competition between both species on post-mortem interval was discussed.

scholarly journals The effect of seasonality on the application of accumulated degree-days to estimate the early post-mortem interval

2020 ◽  
Vol 315 ◽  
pp. 110419 ◽  
Author(s):  
Stephanie B. Giles ◽  
Karl Harrison ◽  
David Errickson ◽  
Nicholas Márquez-Grant
Keyword(s):  
Post Mortem ◽  
Degree Days ◽  
Post Mortem Interval ◽  
Accumulated Degree Days

scholarly journals Feasibility of Total Body Score (TBS) and Accumulated Degree Days (ADD) in the Estimation of Postmortem Interval for Forensic Murder Casework

2018 ◽  
Vol 24 (1) ◽  
pp. 35-42
Author(s):  
Young Sam Kim ◽  
Jong Hee Kim ◽  
Kwang Sang Yoon ◽  
Bong Soo Kweon ◽  
Young Sik Kim ◽  
...  
Keyword(s):  
Postmortem Interval ◽  
Degree Days ◽  
Total Body Score ◽  
Total Body ◽  
Accumulated Degree Days

Reliability of weathering in the estimation of the post-mortem interval of human remains buried in coffins

2016 ◽  
Vol 50 (4) ◽  
pp. 414-427 ◽  
Author(s):  
Ines Buekenhout ◽  
Duarte Nuno Vieira ◽  
Maria Teresa Ferreira
Keyword(s):  
Human Remains ◽  
Post Mortem ◽  
Post Mortem Interval

scholarly journals The development of a post-mortem interval estimation for human remains found on land in the Netherlands

2017 ◽  
Vol 132 (3) ◽  
pp. 863-873 ◽  
Author(s):  
H. T. Gelderman ◽  
L. Boer ◽  
T. Naujocks ◽  
A. C. M. IJzermans ◽  
W. L. J. M. Duijst
Keyword(s):  
The Netherlands ◽  
Interval Estimation ◽  
Human Remains ◽  
Post Mortem ◽  
Post Mortem Interval

scholarly journals Post-Mortem Interval Estimation Based on Insect Evidence: Current Challenges

Insects ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 314
Author(s):  
Szymon Matuszewski
Keyword(s):  
Forensic Entomology ◽  
Interval Estimation ◽  
Review Literature ◽  
Error Rates ◽  
Post Mortem ◽  
Post Mortem Interval ◽  
Research Areas ◽  
Pmi Estimation

During death investigations insects are used mostly to estimate the post-mortem interval (PMI). These estimates are only as good as they are close to the true PMI. Therefore, the major challenge for forensic entomology is to reduce the estimation inaccuracy. Here, I review literature in this field to identify research areas that may contribute to the increase in the accuracy of PMI estimation. I conclude that research on the development and succession of carrion insects, thermogenesis in aggregations of their larvae and error rates of the PMI estimation protocols should be prioritized. Challenges of educational and promotional nature are discussed as well, particularly in relation to the collection of insect evidence.

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