An explosion propels a bullet from a firearm, a life is taken, and a gun crime has been committed. This book uses true life crime stories from early cases like the St. Valentine's Day Massacre to more recent war crimes in Croatia to engage readers while educating them on forensic firearm analysis, which includes identifying basic types of firearms and bullets, matching bullet tool marks to a specific gun, and gathering crime scene evidence. This book is excellent for readers interested in STEM, as forensic firearm analysis is a multidisciplinary field that incorporates chemistry, microscopy, physics, medical pathology, and deductive reasoning.