What information can be developed from firearms-related evidence beyond determining that two rounds were fired from the same gun?

Firearms-related evidence can provide a wealth of information that extends beyond merely identifying that two rounds were fired from the same firearm. Each bullet fired leaves unique markings that can be examined for forensic analysis.

Determining the caliber number is one essential aspect, as it helps narrow down the type of firearm used. However, the analysis of land and groove markings is equally vital. These markings are produced through the unique rifling pattern of the gun’s barrel, which can assist in linking bullets to specific firearms.

Furthermore, striations, which are the unique scratches and impressions left on the bullet by the barrel during its passage, can further strengthen the case for a particular firearm being responsible for the shots fired. Striations, in combination with caliber measurements and land and groove markings, allow forensic analysts to create a comprehensive profile of the evidence.

Therefore, the correct answer includes the possibility of developing all these facets of information—caliber number, land and groove markings, and striations—permitting a more thorough connection between the evidence and the firearm in question.