Application of 3D Printing in Assessment and Demonstration of Stab Injuries

Overview

Journal Int J Legal Med

Specialty Forensic Sciences

Date 2022 Jun 3

PMID 35657431

Authors

Gabor Simon

Denes Toth

Veronika Heckmann

Viktor Soma Poor

Affiliations

Soon will be listed here.

Abstract

In stabbing related fatalities, the forensic pathologist has to assess the direction of wound track (thus, the direction of the stabbing) and the weapon's possible characteristics by examining the stab wound. The determination of these characteristics can be made only with a high level of uncertainty, and the precise direction of the stabbing is often difficult to assess if only soft tissues are injured. Previously reported techniques used for the assessment of these wound characteristics have substantial limitations. This manuscript presents a method using today's easily accessible three-dimensional (3D) printing technology for blade-wound comparison and wound track determination. Scanning and 3D printing of knives is a useful method to identify weapons and determine the precise stabbing direction in a stabbing incident without compromising the trace evidence or the autopsy results. Ballistic gel experiment, and dynamic stabbing test experiments prove the method can be applied in safety, without compromising the autopsy results. Identification of the exact knife is not possible with complete certainty but excluding certain knives will decrease the number of necessary DNA examinations, hence it can lower the burden on forensic genetic laboratories. The method addresses many of the shortcomings of previously used methods of probe insertion or post-mortem CT. Insertion of the printed knife into the wound gives a good visual demonstration of the stabbing direction, thus easing the forensic reconstruction of the stabbing incident. After combining the 3D printing with photogrammetry, the achieved 3D visualization is useful for courtroom demonstration and educational purposes.

References

Buck U, Busse K, Campana L, Schyma C . Validation and evaluation of measuring methods for the 3D documentation of external injuries in the field of forensic medicine. Int J Legal Med. 2017; 132(2):551-561. DOI: 10.1007/s00414-017-1756-6. View

Ruder T, Ketterer T, Preiss U, Bolliger M, Ross S, Gotsmy W . Suicidal knife wound to the heart: challenges in reconstructing wound channels with post mortem CT and CT-angiography. Leg Med (Tokyo). 2010; 13(2):91-4. DOI: 10.1016/j.legalmed.2010.11.005. View

Urbanova P, Hejna P, Jurda M . Testing photogrammetry-based techniques for three-dimensional surface documentation in forensic pathology. Forensic Sci Int. 2015; 250:77-86. DOI: 10.1016/j.forsciint.2015.03.005. View

Byard R, Gehl A, Tsokos M . Skin tension and cleavage lines (Langer's lines) causing distortion of ante- and postmortem wound morphology. Int J Legal Med. 2005; 119(4):226-30. DOI: 10.1007/s00414-005-0539-7. View

Carew R, Errickson D . An Overview of 3D Printing in Forensic Science: The Tangible Third-Dimension. J Forensic Sci. 2020; 65(5):1752-1760. DOI: 10.1111/1556-4029.14442. View

Schwark T, Poetsch M, Preusse-Prange A, Kamphausen T, von Wurmb-Schwark N . Phantoms in the mortuary--DNA transfer during autopsies. Forensic Sci Int. 2011; 216(1-3):121-6. DOI: 10.1016/j.forsciint.2011.09.006. View

Zerbini T, Ferraz da Silva L, Ferro A, Kay F, Junior E, Pasqualucci C . Differences between postmortem computed tomography and conventional autopsy in a stabbing murder case. Clinics (Sao Paulo). 2014; 69(10):683-7. PMC: 4221313. DOI: 10.6061/clinics/2014(10)06. View

Carew R, Morgan R, Rando C . A Preliminary Investigation into the Accuracy of 3D Modeling and 3D Printing in Forensic Anthropology Evidence Reconstruction. J Forensic Sci. 2018; 64(2):342-352. PMC: 7380002. DOI: 10.1111/1556-4029.13917. View

Jacques R, Kogon S, Shkrum M . An experimental model of tool mark striations by a serrated blade in human soft tissues. Am J Forensic Med Pathol. 2014; 35(1):59-61. DOI: 10.1097/PAF.0000000000000078. View

10.

Bolliger S, Ruder T, Ketterer T, Glaser N, Thali M, Ampanozi G . Comparison of stab wound probing versus radiological stab wound channel depiction with contrast medium. Forensic Sci Int. 2014; 234:45-9. DOI: 10.1016/j.forsciint.2013.10.031. View

11.

Michailow R . [A possibility for identification of the knife's edge in stab wounds (author's transl)]. Z Rechtsmed. 1977; 80(3):247-8. DOI: 10.1007/BF02114620. View

12.

Schnider J, Thali M, Ross S, Oesterhelweg L, Spendlove D, Bolliger S . Injuries due to sharp trauma detected by post-mortem multislice computed tomography (MSCT): a feasibility study. Leg Med (Tokyo). 2008; 11(1):4-9. DOI: 10.1016/j.legalmed.2008.07.001. View

13.

Reagan J, Selmic L, Garrett L, Singh K . Evaluation of the effects of anatomic location, histologic processing, and sample size on shrinkage of skin samples obtained from canine cadavers. Am J Vet Res. 2016; 77(9):1036-44. DOI: 10.2460/ajvr.77.9.1036. View

14.

Shamata A, Thompson T . Determining the Effectiveness of Noncontact Three-Dimensional Surface Scanning for the Assessment of Open Injuries. J Forensic Sci. 2019; 65(2):627-635. DOI: 10.1111/1556-4029.14205. View

15.

Pounder D, Cormack L . An experimental model of tool mark striations in soft tissues produced by serrated blades. Am J Forensic Med Pathol. 2011; 32(1):90-2. DOI: 10.1097/paf.0b013e3181edf2de. View

16.

Crowder C, Rainwater C, Fridie J . Microscopic analysis of sharp force trauma in bone and cartilage: a validation study. J Forensic Sci. 2013; 58(5):1119-1126. DOI: 10.1111/1556-4029.12180. View

17.

Love J, Derrick S, Wiersema J, Peters C . Validation of tool mark analysis of cut costal cartilage. J Forensic Sci. 2011; 57(2):306-11. DOI: 10.1111/j.1556-4029.2011.01977.x. View

18.

Bolliger S, Preiss U, Glaeser N, Thali M, Ross S . Radiological stab wound channel depiction with instillation of contrast medium. Leg Med (Tokyo). 2009; 12(1):39-41. DOI: 10.1016/j.legalmed.2009.09.006. View

19.

Fais P, Cecchetto G, Boscolo-Berto R, Toniolo M, Viel G, Miotto D . Morphometric analysis of stab wounds by MSCT and MRI after the instillation of contrast medium. Radiol Med. 2016; 121(6):494-501. DOI: 10.1007/s11547-015-0612-3. View

20.

Hosoya T, Harada K, Kanetake J . An autopsy case: Unusual characteristics of stab wounds inflicted by a survival knife. Leg Med (Tokyo). 2020; 47:101762. DOI: 10.1016/j.legalmed.2020.101762. View