Abstract
Bloodstain pattern analysis is a routine procedure in forensic cases that involve bleeding wounds. It utilizes geometric principles to determine the sequence of actions causing the bloodshed and the area of origin, that is, from where the blood originated. The patterns formed by circular bloodstains from drops of blood that hit adjacent surfaces at a 90-degree angle are thought to provide indications of the height of the impact. In this study, blunt force exerted against a pool of blood, which was used as a surrogate for a bleeding wound, was carried out for five different impact-to-wall distances. The blunt force consisted of a hammer head that was dropped from a height of 1.5 m. High-speed photography of the impact and trajectories of the projected blood droplets was analysed. The patterns containing bloodstains produced by the droplets were analysed by measuring the circular bloodstains within the patterns. All the experiments showed that there were two distinct patterns or clusters of circular bloodstains that occurred at different heights above the impact site. The two patterns were a result of different fractions of blood that were projected in a garland or crown-like form of a “Worthington splash” after impact. The findings suggest that patterns of circular bloodstains cannot be used as direct indicators of impact height, but combined analysis of their clusters may lead to indirect determination of impact-to-wall distance and area of origin.
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References
Rand S, Madea B, Brinkmann B (1985) Zur morphologie von blutspuren. Beitr Gerichtl Med XLIII:259–264
Mac Donell HL (1993) Bloodstain patterns. Golas, NY
Bevel T, Gardener RM (1997) Bloodstain pattern analysis with an introduction to crime scene reconstruction. CRC, Boca Raton
Stuart HJ, Kish PE, Sutton TP (2005) Principles of bloodstain pattern analysis. Theory and Practice. Taylor & Francis, Boca Raton
Rothschild MA (2008) Analyse des Blutspurenverteilungsmusters. In: Kneubuehl BP, Coupland RM, Rothschild MA, Thali MJ (eds) Wundballistik, 3rd edn. Springer, Berlin, pp 269–272
Peschel O, Kunz SN, Rothschild MA, Mützel E (2011) Blood stain pattern analysis. Forensic Sci Med Pathol 7:257–270
De Bruin KG, Stoel RD, Limborgh JC (2011) Improving the point of origin determination in bloodstain pattern analysis. J Forensic Sci 56:1476–1482
Buck U, Kneubuehl B, Näther S, Albertini N, Schmidt L, Thali M (2011) 3D bloodstain pattern analysis: ballistic reconstruction of the trajectories of blood drops and determination of the centres of origin of the bloodstains. Forensic Sci Int 206:22–28
Gardner R, Maloney M, Rossi C (2012) Crime scene investigator’s method for documenting impact patterns for subsequent off-scene area-of-origin analysis. J For Ident 62:368–387
Attinger D, Moore C, Donaldson A, Jafari A, Stone HA (2013) Fluid dynamics topics in bloodstain pattern analysis: comparative review and research opportunities. Forensic Sci Int 231:375–396
Camana F (2013) Determining the area of convergence in bloodstain pattern analysis: a probabilistic approach. Forensic Sci Int 231:131–136
Connolly C, Illes M, Fraser J (2012) Affect of impact angle variations on area of origin determination in bloodstain pattern analysis. Forensic Sci Int 223:233–240
Illes M, Boué M (2013) Robust estimation for area of origin in bloodstain pattern analysis via directional analysis. Forensic Sci Int 226:223–229
White RB (1986) Bloodstain pattern of fabrics—the effect of drop volume, dropping height and impact angle. Can Soc Forensic Sci J 19:3–36
Ramsthaler F, Schmidt P, Bux R, Potente S, Kaiser C, Kettner M (2012) Drying properties of bloodstains on common indoor surfaces. Int J Legal Med 126:739–746
Schuler RL, Kish PE, Plese CA (2012) Preliminary observations on the ability of hyperspectral imaging to provide detection and visualization of bloodstain patterns on black fabrics. J Forensic Sci 57:1562–1569
De Castro T, Nickson T, Carr D, Knock C (2013) Interpreting the formation of bloodstains on selected apparel fabrics. Int J Legal Med 127:251–258
Larkin BA, Banks CE (2013) Preliminary study on the effect of heated surfaces upon bloodstain pattern analysis. J Forensic Sci 58:1289–1296
Wagner C, Amarouchene Y, Bonn D, Eggers J (2005) Droplet detachment and bead formation in visco-elastic fluids. Phys Rev Lett. doi:10.1103/PhysRevLett.95.164504
Brust M, Schaefer C, Doerr R, Pan L, Garcia M, Arratia PE, Wagner C (2013) Rheology of human blood plasma: viscoelastic versus newtonian behavior. Phys Rev Lett. doi:10.1103/PhysRevLett.110.078305
Worthington AM (1877) On the forms assumed by drops of liquid falling vertically on a horizontal plate. Proc R Soc Lond 25:261–272
Josserand C, Zaleski S (2003) Droplet splashing on a thin liquid film. Phys Fluids 15:1650–1657
Yoon SS, Jepsen RA, Nissen MR, O’Hern TJ (2007) Experimental investigation on splashing and nonlinear fingerlike instability of large water drops. J Fluids Struct 23:101–115
Taylor GI (1959) The dynamics oft hin sheets of fluid. III. Disintegration of fluid sheets. Proc R Soc Lond A. doi:10.1098/rspa.1959.0196
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The authors declare that they have no conflicts of interest. Experiments carried out for this study are in compliance with the current laws in Germany.
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Kettner, M., Schmidt, A., Windgassen, M. et al. Impact height and wall distance in bloodstain pattern analysis—what patterns of round bloodstains can tell us. Int J Legal Med 129, 133–140 (2015). https://doi.org/10.1007/s00414-014-1036-7
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DOI: https://doi.org/10.1007/s00414-014-1036-7