MicahJava
Illuminator
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From the book Gunshot Wounds Practical Aspects of Firearms, Ballistics, and Forensic Techniques:
Examination of Bullets for Tissue and Foreign Material
If a bullet passes through a body or intermediary target, or ricochets off a hard surface,
fragments of tissue or target material may adhere to or be imbedded in the bullet. If the
bullet is a hollow point, a relatively large wad of this material may be deposited in the cavity.
Recovery and identification of foreign material from a bullet may identify the organs or
intermediary object perforated or prove that the bullet was a ricochet. Nonorganic material,
such as aluminum from a window screen perforated by a bullet or minerals from a
stone off of which a bullet ricocheted, can be identified on a bullet by scanning electron
microscopy with energy-dispersive x-ray (SEM–EDX).14
In a series of tests involving FMJ 9 ×19 mm bullets, fired at 10 different materials and
examined by SEM/EDX, Karger et al.15 found the following:
...
In the case of high-velocity bullets,
they noted extensive fragmentation of the tissue with blood clots, bone fragments, muscle,
and amorphous debris, the most common tissues recovered. Mesothelial cells and organ
fragments were less common. Tissue recovered from low-velocity bullets was better preserved
and more abundant. Adipose tissue, fragments of small vessels, and clumps of spindle
cells were most commonly found; skeletal and cardiac muscles, occasionally. Visceral
organ fragments were not necessarily found even when the organs were perforated. Skin
was the least commonly encountered. In regard to gunshot wounds of the head, bone
chips, skeletal muscle, connective tissue, and strips of small vessels were commonly identified.
Fragments of brain were present but were not readily recognizable as neural in origin.
Examination of Bullets for Tissue and Foreign Material
If a bullet passes through a body or intermediary target, or ricochets off a hard surface,
fragments of tissue or target material may adhere to or be imbedded in the bullet. If the
bullet is a hollow point, a relatively large wad of this material may be deposited in the cavity.
Recovery and identification of foreign material from a bullet may identify the organs or
intermediary object perforated or prove that the bullet was a ricochet. Nonorganic material,
such as aluminum from a window screen perforated by a bullet or minerals from a
stone off of which a bullet ricocheted, can be identified on a bullet by scanning electron
microscopy with energy-dispersive x-ray (SEM–EDX).14
In a series of tests involving FMJ 9 ×19 mm bullets, fired at 10 different materials and
examined by SEM/EDX, Karger et al.15 found the following:
...
In the case of high-velocity bullets,
they noted extensive fragmentation of the tissue with blood clots, bone fragments, muscle,
and amorphous debris, the most common tissues recovered. Mesothelial cells and organ
fragments were less common. Tissue recovered from low-velocity bullets was better preserved
and more abundant. Adipose tissue, fragments of small vessels, and clumps of spindle
cells were most commonly found; skeletal and cardiac muscles, occasionally. Visceral
organ fragments were not necessarily found even when the organs were perforated. Skin
was the least commonly encountered. In regard to gunshot wounds of the head, bone
chips, skeletal muscle, connective tissue, and strips of small vessels were commonly identified.
Fragments of brain were present but were not readily recognizable as neural in origin.
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