When a firearm is not recovered there still may be certain general conclusions that can be reached when gunshot residues are found on the evidence garment.
Contact or Near Contact Gunshot
Probably the easiest conclusion to report would be one involving a contact or near contact gunshot. The results may read something like:
Exhibit 1 (shirt) was found to have a bullet entrance hole in the chest area that displays physical effects and gunshot residues consistent with a contact or near contact gunshot.
A contact or near contact gunshot will normally deposit a very intense ring of residue right around the margins of the bullet hole. A close range gunshot, like the one seen above, will typically be in the near contact to approximately 12-inch range of fire.
Close Range Gunshot
Another conclusion that is fairly easy to reach involves what can be call a close range gunshot. The results may read something like:
Exhibit 1 (shirt) was found to have a bullet entrance hole in the chest area. A heavy deposit of gunshot residues were found around this hole that are consistent with those that would be deposited by a close range gunshot.
Close range gunshots will usually leave a very concentrated deposit of residue around the bullet entrance hole that is visible to the eye.
A close range gunshot, like the one seen above, will typically be in the near contact to approximately 12-inch range of fire.
Intermediate Range Gunshot
An intermediate range gunshot usually will deposit a significant amount of particulate residue that is not easily seen with the eye but can be detected through a microscopic examination and through chemical testing. The results may read something like:
Exhibit 1 (shirt) was found to have a bullet entrance hole in the chest area. A deposit of gunshot residues were found around this hole that are consistent with those that would be deposited by an intermediate range gunshot.
An intermediate range gunshot, like that seen in the above image, can range from just beyond the 12-inch range out to 24 to 36 inches. This depends greatly upon the caliber, barrel length and powder type used in the ammunition.