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Forensic Science, Medicine, and Pathology

, Volume 13, Issue 2, pp 188–195 | Cite as

The reference cube: A new ballistic model to generate staining in firearm barrels

  • Christian SchymaEmail author
  • Kristina Bauer
  • Julia Brünig
Original Article

Abstract

After contact shots to the head biological traces can be found inside firearm barrels. So far silicone coated, gelatin filled box models were used to generate such staining according to the triple contrast method (mixture of acrylic paint, barium sulfate and blood sealed in a thin foil bag). This study was conducted to develop a transparent ballistic model allowing contact shots. Gelatin filled polyethylene bottles with and without a silicone coat were tested in comparison to non-covered gelatin blocks. Finally, thin foil bags of 5 cm × 5 cm dimension were glued on a synthetic absorbent kitchen wipe on top of which 1 L 10% gelatin solution was molded to create blocks of 8.5 cm length. A kitchen wipe with a paint pad on its inside formed the front of the cube. Three contact shots each with a 9 mm Luger pistol and a .38 special revolver were performed on all model variations. The staining was documented by endoscopy and swabs gathered from both ends of the barrel were analyzed by quantitative PCR. Reliable staining was achieved using the front covered gelatin block with comparable results to the silicone coated box model used before. For further research using ballistic models to simulate a human head a symmetric form of the gelatin block such as a cube is recommended.

Keywords

Suicide Firearm Wound ballistics Backspatter Biological traces Gun barrel 

Notes

Acknowledgements

This research work was funded by the SNF (Swiss National Science Foundation, project 310030E-147628 / 1). The expert technical assistance of Marion Sauer (Bonn) and Nicole Schwendener (Bern) is also gratefully acknowledged. The authors would also like to thank PhD Dr. Eva Brenčičová for proofreading the manuscript.

Compliance with ethical standards

Funding

This research work was funded by the SNF (Swiss National Science Foundation, project 310030E-147,628 / 1).

Conflict of interests

The authors declare that they have no conflict of interests. Ethical approval: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent: Informed consent was obtained from all individual participants included in the study.

References

  1. 1.
    Classen U, Makuch D, Wilske J, Schyma C. DNA analysis on material from barrels of firearms. Int Symp Forensic DNA Technol Münster Rechtsmedizin. 2003;13:276.Google Scholar
  2. 2.
    Regneri W. Diagnostik bei Suizid mit Schusswaffen. Endoskopie von Waffenläufen und DNA-Analyse als komplementäre Methoden. Dissertation: Universität des Saarlandes, Homburg; 2006.Google Scholar
  3. 3.
    Schyma C, Madea B, Courts C. Persistence of biological traces in gun barrels after fatal contact shots. Forensic Sci Int Genet. 2013;7:22–7.CrossRefGoogle Scholar
  4. 4.
    Schyma C, Brünig J, Madea B, Jackowski C. Die Endoskopie des Waffenlaufes. Rechtsmedizin. 2016;26:224–9.CrossRefGoogle Scholar
  5. 5.
    Courts C, Madea B, Schyma C. Persistence of biological traces in gun barrels – an approach to an experimental model. Int J Legal Med. 2012;126:391–7.CrossRefGoogle Scholar
  6. 6.
    Schyma C, Lux C, Madea B, Courts C. The 'triple contrast' method in experimental wound ballistics and backspatter analysis. Int J Legal Med. 2015;129:1027–33.CrossRefGoogle Scholar
  7. 7.
    Schyma C, Bauer K, Brünig J, Schwendener N, Müller R. Visualization of the powder pocket and its influence on staining in firearm barrels in experimental contact shots. Int J Legal Med. 2017;131(1):167–72.CrossRefGoogle Scholar
  8. 8.
    Schyma C, Bauer K, Brünig J, Courts C, Madea B. Staining in firearm barrels after experimental contact shots. Forensic Sci Int. 2017; doi: 10.1016/j.forsciint.2017.01.031.CrossRefPubMedGoogle Scholar
  9. 9.
    Schyma C, Madea B. Evaluation of the temporary cavity in ordnance gelatine. Forensic Sci Int. 2012;214(1–3):82–7.CrossRefGoogle Scholar
  10. 10.
    Brüning A, Wiethold F. Die Untersuchung und Beurteilung von Selbstmörderschusswaffen. Dtsch Z Gerichtl Med. 1934;23:71–82.Google Scholar
  11. 11.
    Courts C, Gahr B, Madea B, Schyma C. Persistence of biological traces at inside parts of a firearm from a case of multiple familial homicide. J Forensic Sci. 2014;59:1129–32.CrossRefGoogle Scholar
  12. 12.
    Lux C, Schyma C, Madea B, Courts C. Identification of gunshots to the head by detection of RNA in backspatter primarily expressed in brain tissue. Forensic Sci Int. 2014;237:62–9.CrossRefGoogle Scholar
  13. 13.
    Grabmüller M, Schyma C, Euteneuer J, Madea B, Courts C. Simultaneous analysis of nuclear and mitochondrial DNA, mRNA and miRNA from backspatter from inside parts of firearms generated by shots at "triple contrast" doped ballistic models. Forensic Sci Med Pathol. 2015;11:365–75.CrossRefGoogle Scholar
  14. 14.
    Schyma C. Colour contrast in ballistic gelatine. Forensic Sci Int. 2010;197(1–3):114–8.CrossRefGoogle Scholar
  15. 15.
    Riva F, Kerkhoff W, Bolck A, Mattijssen EJ. Possible influences on bullet trajectory deflection in ballistic gelatine. Forensic Sci Int. 2016;271:107–12.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  1. 1.Institute of Forensic MedicineUniversity of BernBernSwitzerland

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