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Using STR analysis to detect human DNA from exploded pipe bomb devices.

Kelly J Esslinger1, Jay A Siegel, Heather Spillane

  • 1School of Criminal Justice, Michigan State University, USA.

Journal of Forensic Sciences
|June 3, 2004
PubMed
Summary
This summary is machine-generated.

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Investigating DNA recovery from exploded pipe bombs, this study found no difference between metal and PVC materials. Successful DNA profiling depends on fragment recovery and skin cell shedding by the bomb assembler.

Area of Science:

  • Forensic Science
  • Molecular Biology
  • Explosives Analysis

Background:

  • Recovering DNA from post-detonation devices is crucial for forensic investigations.
  • Pipe bombs, constructed from various materials, present unique challenges for evidence recovery.

Purpose of the Study:

  • To assess the feasibility of obtaining DNA profiles from exploded pipe bomb fragments.
  • To compare DNA recovery success rates from metal versus polyvinyl chloride (PVC) pipe bomb components.
  • To identify factors influencing successful DNA profiling from explosive device remnants.

Main Methods:

  • Ten subjects handled components of both metal and PVC pipe bombs.
  • Bombs were detonated, fragments collected, and swabbed using a double swab technique.
  • DNA extraction, quantification, amplification, and genotyping were performed using polymerase chain reaction/short tandem repeat (PCR/STR) analysis.

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Main Results:

  • Reportable DNA profiles matching subjects were obtained from four of the 20 exploded bombs.
  • An additional eight sub-reportable profiles were generated, also matching subjects.
  • No significant difference in DNA recovery success was observed between metal and PVC pipe bomb fragments.
  • The extent of bomb fragmentation and fragment recovery were identified as key factors influencing DNA yield.

Conclusions:

  • DNA profiling from exploded pipe bomb fragments is possible, though success rates vary.
  • Material type (metal vs. PVC) did not impact DNA recovery efficiency.
  • Successful DNA profiling is likely influenced by the degree of fragmentation, fragment recovery, and the individual's skin cell shedding characteristics.