Which type of evidence can provide ballistic information about a shooting incident?

Cartridge casings are crucial in providing ballistic information about a shooting incident because they contain specific markings that are left by the firearm during the firing process. Each firearm has unique characteristics that are transferred onto the casing, such as firing pin impressions, extractor marks, and ejector marks. These markings are vital for forensic analysts as they can link a particular casing to a specific weapon, helping to establish connections between the firearm, the crime scene, and possible suspects. Analyzing these casings can also reveal important details about the type of ammunition used, the angle of the shot, and sometimes the number of rounds fired, all of which are essential for reconstructing the events of the incident. This type of ballistic evidence is key in both criminal investigations and courtroom proceedings.