We just learned about the Toxicology.
Another part of forensics is the study of Ballistic Fingerprints.
When someone uses a gun to shoot someone else, and they run away before the police can arrest them, there are ways that scientists can look at the bullets to try and figure out which gun they came from.
When a bullet is shot out of a gun, it spins around inside the gun's barrel.
This is a special thing called rifling, and it helps the bullet go straighter.
The way the bullet is spun around inside the gun leaves marks on the metal bullet.
If the police find the bullet that was used to shoot someone, and they find the gun that they think was used, they can test shooting another bullet out of that same gun and see if the marks on the bullets match.
They put both bullets under a microscope and if the lines match up, then they can use that as evidence to put a bad person in jail.
(from: wikipedia - forensic firearm examination)
Kid Facts - Blast from the past: Gas Rocket Propellants
