3D bloodstain pattern analysis: ballistic reconstruction of the trajectories of blood drops and determination of the centres of origin of the bloodstains

Buck, Ursula; Kneubuehl, Beat; Näther, Silvio; Albertini, Nicola; Schmidt, Lars; Thali, Michael (2011). 3D bloodstain pattern analysis: ballistic reconstruction of the trajectories of blood drops and determination of the centres of origin of the bloodstains. Forensic science international, 206(1-3), pp. 22-8. Shannon: Elsevier Scientific Publ. Ireland 10.1016/j.forsciint.2010.06.010

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For crime scene investigation in cases of homicide, the pattern of bloodstains at the incident site is of critical importance. The morphology of the bloodstain pattern serves to determine the approximate blood source locations, the minimum number of blows and the positioning of the victim. In the present work, the benefits of the three-dimensional bloodstain pattern analysis, including the ballistic approximation of the trajectories of the blood drops, will be demonstrated using two illustrative cases. The crime scenes were documented in 3D, using the non-contact methods digital photogrammetry, tachymetry and laser scanning. Accurate, true-to-scale 3D models of the crime scenes, including the bloodstain pattern and the traces, were created. For the determination of the areas of origin of the bloodstain pattern, the trajectories of up to 200 well-defined bloodstains were analysed in CAD and photogrammetry software. The ballistic determination of the trajectories was performed using ballistics software. The advantages of this method are the short preparation time on site, the non-contact measurement of the bloodstains and the high accuracy of the bloodstain analysis. It should be expected that this method delivers accurate results regarding the number and position of the areas of origin of bloodstains, in particular the vertical component is determined more precisely than using conventional methods. In both cases relevant forensic conclusions regarding the course of events were enabled by the ballistic bloodstain pattern analysis.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Service Sector > Institute of Legal Medicine

UniBE Contributor:

Buck, Ursula; Kneubühl, Beat P.; Näther, Silvio and Thali, Michael

ISSN:

0379-0738

Publisher:

Elsevier Scientific Publ. Ireland

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:10

Last Modified:

06 Dec 2013 13:21

Publisher DOI:

10.1016/j.forsciint.2010.06.010

PubMed ID:

20598820

Web of Science ID:

000288200400029

URI:

https://boris.unibe.ch/id/eprint/1533 (FactScience: 203307)

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