During 1835 – 1899 events occurred that would be associated with firearms and identification of the gun used in a crime. They use the gauge of the shotgun, the manufacturer or marketer, the range of possible shot sizes based on impressions in the shot shell was , and individual characteristics. Firearms can be recovered at shooting scenes by crime scene investigators and sent to the laboratory. Bullets, bullet fragments, cartridge cases, shot shell wadding, etc. are what they use to test at the laboratory. There are different ways that crime labs examine bullets, Striations on a fired bullet, Gunpowder residue leaves expected patterns, fingerprints, and Bullet damage. Once a bullet is recovered, either from an impact point in a soft wall or pulled out of flesh by a medical examiner or a physician. When a gun is fired, the bullet is not the only thing that comes out of the barrel. Burning powder particles also expectorate and will create a pattern on the object closest to the barrel. With this technology they can retrieve a gun from a suspect and run tests and find out whether it has been shot …show more content…
The Federal Bureau of investigation has access to as many as 411.9 million images, to help recognize people in their database. With this technology they can take a person’s description of their attacker and put it into their database and increase their chances of choosing the right person. On the morning of November 23, 2009, a biker riding ,discovered the body of a young girl road. She has beaten and her face was unrecognizable, but a tattoo led the police to identify her as 19-year-old Sierra Bouzigard. Investigators at a Sheriff’s Office, headed by Sheriff Tony Mancuso, immediately started to recreate her final hours. The people who last saw Bouzigard alive had let her use their phone. The number she dialed gave police a lead. Bouzigard’s assailant had also left behind a clue. From tissue caught under her fingernails, the detectives were able to get a sample of DNA. To find the killer, all they needed was a