LIsa Black
Cape Coral, FL
Female, 49
I spent the five happiest years of my life in a morgue. As a forensic scientist in the Cleveland coroner’s office I analyzed gunshot residue on hands and clothing, hairs, fibers, paint, glass, DNA, blood and many other forms of trace evidence, as well as crime scenes. Now I'm a certified latent print examiner and CSI for a police department in Florida. I also write a series of forensic suspense novels, turning the day job into fiction. My books have been translated into six languages.
Why do you post questions that need to be deleted? Most people have better things to do.
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No. I do lots of stuff detectives don’t do, like lab analysis, scene reconstruction, latent print comparison, etc. And they do tons of stuff I don’t do, like track down victims/witnesses/suspects and interview them, run criminal histories, request search warrants, and so on. So our jobs are really very different. We are there to provide the forensic support for the case, but forensic topics are only part of any case. Hope that helps!
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Usually simple black powder will show gloveprints as well as fingerprints. The bubbly sort of pattern they make will be visible.
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That's an excellent question that unfortunately I can't answer. One probably would use it, but back when I did hairs and fibers it was generally thought that the only way was to extract the dye and do thin-layer chromatography, which we didn't have. We also didn't have a Ramen, so all I could do was microscopic comparison.
Best of luck!
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Professor
Are professors really subject to the "Publish or Perish" policy?
Auto Mechanic
What car brands are most/least likely to end up in the shop?
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Is it possible to perform CPR on animals?
Because that's not our job. That's the detective's job. They're in charge of and responsible for the investigation.
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That’s a good question that I’m afraid I can’t answer. I’m sure there is some way to determine the chemicals used in pepper spray. But this would be affected by a) how long does it remain on the skin before the skin absorbs it and b) most forensic chemistry labs are set up to detect illegal drugs in urine, blood or gastric contents. Identifying any kind of poison or other substance may require equipment or reference databases they don’t have.
Proving it’s the same batch of pepper spray may or may not be possible. I”m not personally involved in this kind of testing, but I can assure you it is not like television. We had a series of cases and wanted to determine the exact composition of drugs with percentages of fentanyl, heroin etc. Turned out while nearly every crime lab can determine if a drug is present, there were only one or two labs in the entire country we could find that could determine percentages, and they charged an arm and a leg.
Sorry I can’t be more help.
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I have no idea as I’ve never worked as a first responder. I would suspect that’s largely a plot device for film or books, but I don’t actually know.
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