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Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores
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Detecting buried metallic weapons in a controlled setting using a conductivity meter.

Charles A Dionne1, John J Schultz, Ronald A Murdock

  • 1University of South Florida, Department of Anthropology, Tampa, FL 33620, United States. cadionne@mail.usf.edu

Forensic Science International
|November 16, 2010
PubMed
Summary

A conductivity meter effectively detects buried metallic weapons, with larger items and ferrous metals found at greater depths. A 25 cm spacing is recommended for detecting smaller firearms during forensic searches.

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Area of Science:

  • Forensic Science
  • Geophysical Surveying

Background:

  • Forensic searches for buried weapons require non-invasive methods to preserve evidence.
  • Geophysical instruments are crucial for pinpointing areas of interest, minimizing site disturbance.
  • No prior research evaluated conductivity meters for detecting metallic weapons.

Purpose of the Study:

  • To assess the utility of a conductivity meter for locating buried metallic weapons.
  • To determine the factors influencing detection depth and accuracy.

Main Methods:

  • A controlled experiment burying 32 metallic weapons (firearms, edged weapons, scrap) at varying depths.
  • Testing the conductivity meter's performance with different weapon sizes, burial depths, transect intervals (25/50 cm), and metal compositions.
  • Systematically reburying weapons deeper until undetected.

Main Results:

  • Detection depth was influenced by weapon size, metal composition (ferrous detected deeper), and burial depth.
  • Larger weapons and ferrous metals yielded deeper detection limits.
  • A 25 cm transect interval spacing is recommended for detecting smaller weapons, while 50 cm may suffice for larger items.

Conclusions:

  • The conductivity meter is a viable geophysical tool for forensic searches of buried metallic weapons.
  • It is particularly useful for larger items or in obstructed areas, and can complement all-metal detectors.