What can investigators really tell from gunshot residue?

The popular TV series "CSI" is fiction, but every day, real-life investigators and forensic scientists collect and analyze evidence to determine what happened at crime scenes. In a study published in the ACS journal Analytical Chemistry, scientists say they have developed a more rapid and accurate method that could allow crime scene investigators to tell what kind of ammunition was shot from a gun based on the residue it left behind.Igor K.http://feeds.feedburner.com/~r/mnt/h...~4/svyMAyP0QbM

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