DNA fingerprinting: This is a technique used in forensics that involves identifying an individual based on their unique DNA profile.
Toxicology: This branch of science deals with the study of poisons, toxins, and their effects on living organisms - often used in forensics to determine cause of death or substance abuse.
Ballistics: This is the science that deals with the motion, behavior, and effects of projectiles, most often firearms and bullets. It's frequently used in forensic investigations related to gun crimes.