Muzzle imprint mark: A patterned injury which may be constituted of intradermal blood extravasations

Pircher, Rebecca; Bielefeld, Lena; Geisenberger, Dorothee; Perdekamp, M. Große; Pollak, Stefan; Thierauf-Emberger, Annette

doi:10.1016/j.forsciint.2014.08.029

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…To this Bscollamente cutaneo^refers Domenici [19] without giving an Italian name. In European literature, the phenomenon is called powder pocket or cavity [8,[20][21][22][23][24][25][26][27][28], whereas in Anglo-American handbooks no specific name is given [10,29].…”

Section: Discussionmentioning

confidence: 99%

Visualization of the powder pocket and its influence on staining in firearm barrels in experimental contact shots

et al. 2016

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The powder pocket or soot cavity is a morphologic characteristic of a close contact shot. In a research project concerning staining inside the barrel, the influence of the powder pocket on these traces was investigated.According to the 'triple contrast method', thin pads containing a mixture of acrylic paint, radiocontrast agent and blood were glued on plastic boxes which were coated with a 3-4-mm-thick silicone layer. The containers filled with 10 % ballistic gelatine, were stored for at least 60 h at 4 °C. Thirty-three contact shots were realized using different pistols and 22 lr, .32 auto, .38 special and 9-mm Luger with different barrel length using subsonic, non-deforming ammunition.The documentation comprised endoscopy, high speed video and computer tomography (CT) of the target models. Using image analysis, the ballooning of the silicone coat was studied (lateral view projection).High-speed video confirmed the actual comprehension of the behaviour of muzzle gases in contact shots. The powder cavity rises in about 1.5 to 2 ms, preceding the maximum of the temporary cavity, and the powder pocket's collapse takes 2.5 to 3 ms.The size of the silicone dome increased with decreasing barrel length. Comparing semi-automatic pistols of 4 in. barrel length in the calibres, .32 auto and 9-mm Luger, there were no significant differences of the powder pocket size. Material transport was observed, against and perpendicularly to the shooting direction. CT showed undermining and gas inclusions inside the powder pocket. A correlation between amount and pattern of the staining inside the barrel and the volume of the powder pocket was not observed.

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Section: Discussionmentioning

confidence: 99%

Visualization of the powder pocket and its influence on staining in firearm barrels in experimental contact shots

et al. 2016

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“…First, the possibility of gunshot injuries was considered, as they were very regular and round. The radial linear pattern around the edges could simulate a muzzle imprint in the case of contact range [8, 9]. However, what was not compatible with a gunshot wound were the so‐called “skin flaps” found in the lesions, which were atypical for a gunshot wound.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of skin injuries caused by power drill

Amadasi

Kock

Kny

et al. 2022

Journal of Forensic Sciences

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In the forensic scenario of penetrating trauma, drill injuries have been very rarely described and often refer to single fatal injuries due to accident or suicide. An analysis of the wound characteristics produced by a drill on the skin has never been described and is presented here. | C A S E REP ORTA 51-year-old female lying on the carriageway in the middle lane of the federal motorway was found by a passing car at around 3:03 a.m.Apparently, the deceased jumped or fell from a motorway overpass a few meters away from the place where the body was found. The deceased had been suffering from an autoimmune disease for 2 years and had experienced constant pain in her abdomen. She was known to be an alcoholic and had already attempted suicide several times.The cause of death was recognized as polytrauma with multiple injuries to the skull, chest, and limbs. On the thorax (Figure 1) and abdomen (Figure 2), a total of nine injuries were found. The injuries had the appearance of a circular to oval marginal abrasion, with regular and smooth margins enclosing an eccentrically placed, marginal defect/penetrating injury with extension into the subcutaneous fat, with a diameter of about 1.2 cm (when circular) and dimensions up

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“…Moreover, the muzzle imprint may indicate the type of the weapon and how the gun was held at the time of discharge [3][4][5][6][7][8][9][10]. From a traumatological point of view, the imprint mark can be considered as a patterned pressure abrasion and/ or intracutaneous bruise [11] reflecting constructional elements located in the muzzle plane (or just behind).…”

Section: Introductionmentioning

confidence: 99%

Rearward movement of the slide in semi-automatic pistols: a factor potentially influencing the configuration of muzzle imprint marks in contact shots

et al. 2018

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A muzzle imprint mark is a highly diagnostic finding, which indicates a contact shot. In many cases, it also provides additional information on the type of the weapon used and on the way in which it was held at the time of firing. In semi-automatic pistols, some constructional elements constituting the muzzle plane move to the rear together with the slide, which may prevent them from causing a corresponding imprint close to the bullet entrance hole. The present study comprises 30 consecutive autopsy cases of fatal contact shots to the head inflicted with semi-automatic pistols. The imprint marks accompanying the entrance wounds were compared with the muzzle ends of the respective weapons both before and after retracting the slide. It turned out that in a considerable number of cases (3 out of 30), the retractable parts were not depicted or only to a minor degree as components of the imprint mark. In order to validate the presumed correlation, experimental shots were fired to composite models using pistols in which the movable and the stationary parts forming the muzzle plane were dyed with different paints. Thus, it could be demonstrated that the muzzle imprint preferentially mirrors the front sides of the stationary parts such as the barrel end, the recoil guide, and the gun housing. Immediately after discharge, the slide and the ballooning skin of the bullet entrance site move in the same direction. The stationary parts of the weapon block the expansion of the skin bulging towards the muzzle, so that the skin gets firmly pressed against them. The dynamic interaction between the gun and the entrance region resulting in a characteristic imprint mark could be visualized by the use of a high-speed motion camera recording test shots to different composite models.

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Muzzle imprint mark: A patterned injury which may be constituted of intradermal blood extravasations

Cited by 7 publications

References 4 publications

Visualization of the powder pocket and its influence on staining in firearm barrels in experimental contact shots

Visualization of the powder pocket and its influence on staining in firearm barrels in experimental contact shots

Characteristics of skin injuries caused by power drill

Rearward movement of the slide in semi-automatic pistols: a factor potentially influencing the configuration of muzzle imprint marks in contact shots

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