STEVE EMBER: The Museum of Crime and Punishment has exhibits that explain how experts gather evidence at the place where a crime is committed. Some of the professionals who examine evidence gathered during criminal investigations are called forensic scientists. These experts use chemistry, physics, anthropology, biology and other sciences to study the clues surrounding a crime. This evidence can be used by investigators who are working to solve the crime and as proof in a court of law.
BARBARA KLEIN: When crime scene investigators arrive at the place of a crime, they first try to make sure the area is secure. They must make sure that nothing in the area gets moved or touched. This could weaken or change any evidence. The investigators also document all evidence by taking photographs and drawing pictures of what they see. Then they collect the evidence and carefully document and transport it so that it can be further examined in a laboratory.
STEVE EMBER: What are some of the clues investigators might look for? Fingerprints are one important clue in a crime scene. No two people have the same fingerprints, so they are useful in identifying suspects. Fingerprints are sometimes very easy to see. For example, a murderer might have blood or dirt on his or her hands which leaves prints on the wall. Investigators sometimes use chemicals and special lighting to uncover fingerprints that cannot be seen with the eye alone.
BARBARA KLEIN: The criminal might also leave his or her shoe prints. Experts can discover the manufacturer of the shoe. They can also tell about a person’s height and the way he or she walks. A suspect might also leave behind hairs or some kind of body fluid such as blood. DNA testing can then reveal the suspect’s identity.
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2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25