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29 - Forensic science and diatoms

from Part V - Other applications

Published online by Cambridge University Press:  05 June 2012

Anthony J. Peabody
Affiliation:
Metropolitan Forensic Science Laboratory
Nigel G. Cameron
Affiliation:
Environmental Change Research Centre (ECRC)
John P. Smol
Affiliation:
Queen's University, Ontario
Eugene F. Stoermer
Affiliation:
University of Michigan, Ann Arbor
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Summary

Introduction

The legal process has used scientific procedures for many years in its various deliberations. Some of these, for instance DNA profiling of body fluids, are now essential and routine practice. The use of diatoms in forensic science is naturally much smaller, but in certain types of investigation, diatom taxonomy and ecology play a significant role. A diatomist may be able to provide investigations with evidence, which will enable the court to reach its verdict, and may be used by either the prosecution or the defence. Below we summarize some of the major applications of diatoms to forensic science.

Drowning

The most frequent application of diatoms in forensic science is in diagnosis of death by drowning. Drowning is a very common accidental cause of death, and thousands die each year in this fashion. The majority of these individuals die in circumstances that are not contentious, where there are witnesses, or strong indications of suicide, such as a note. Where circumstances surrounding an individual's death are less clear, it is often important to be as certain as possible of how death occurred.

Where a body is fresh, the pathologist may have little difficulty in reaching a verdict of drowning. However, the histopathological signs of drowning are often transient and overlaid by the grosser effects of decomposition. Additionally, in cases where an individual has been severely injured before being immersed in water, it is obviously important to determine whether death is due to these injuries or because of drowning.

Type
Chapter
Information
The Diatoms
Applications for the Environmental and Earth Sciences
, pp. 534 - 539
Publisher: Cambridge University Press
Print publication year: 2010

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References

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