When fingerprints are left at a crime scene forensic scientists use magnetic powder to reveal the fingerprint, this is so they can identify who's fingerprint it is. Fingerprints are often left a crime scenes unless the victim was wearing gloves. Forensic scientists can find out who's fingerprint it is because of the pattern on your finger, everyone has a different pattern, this is called your fingerprint. If the police think they know who committed the crime they can match their fingerprint up with the one from the crime scene, they can then tell they did it. Here is some pictures of forensic scientists using fingerpri
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