Final answer:
Examinations with firearms evidence include ballistics, tool mark analysis, and gunshot residue analysis, with reference samples such as bullets, casings, and firearms required. Forensic scientists, who often work in crime labs, use chemistry, biology, or physics backgrounds to analyze such evidence.
Step-by-step explanation:
Types of Examinations with Firearms Evidence
The types of examinations that can be done with firearms evidence include:
- Ballistics: This involves the study of the path of bullets during flight and after impact. Reference samples needed are bullets and casings to compare against those recovered at a crime scene.
- Tool mark analysis: This examination looks at the marks left by a firearm on a bullet or casing, which can be unique to a specific weapon. The firearm itself is required as a reference.
- Gunshot residue analysis: This test detects particles that are expelled when a gun is fired. Hands or clothing of the suspect may serve as reference samples.
Forensic scientists analyze these evidence types to help answer questions related to crimes. They often work in crime labs and are expected to present their findings in court. Students pursuing a career in this field are advised to have a background in chemistry, biology, or physics and experience in a laboratory setting.