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.
Yes, unlike what you see on television, evidence doesn’t necessarily ‘prove’ anything. It all depends on circumstances. If the victim’s blood is on the suspect’s shirt and he says he never met her, that’s vital evidence. If he found the body and tried to revive her, then it likely means nothing. Or bloodstains might tell me the victim was stabbed six inches away from the wall, but that doesn’t tell me who stabbed him. But if the perpetrator is caught and describes what happened, the bloodstains might corroborate or disprove his story. I hope that helps.
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At my department I mostly work with fingerprints, analyzing and comparing fingerprints that I collect off pieces of evidence or pick up at crime scenes or ones that the officers submit after they collect them at crime scenes. I will also go to crime scenes, photograph, collect prints, items of evidence, maybe test for blood or collect samples of blood with sterile swabs. There’s also a lot of time spent writing up all this information in our reports and other paperwork. If I worked in DNA or ballistics or toxicology, I would probably spend all day in the lab doing those types of analysis. So it depends on where you work, what services they provide, and what your exact position is. I hope that helps!
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That’s an excellent question, that unfortunately I can’t answer. We have the OBTI test that can confirm blood is human, but beyond that…I don’t know if there are alleles that both animals and humans share that might show up in the average DNA analysis. Even if animals have some alleles that are the same as humans, if those aren’t the alleles looked for in a DNA test, then it wouldn’t affect things. But if they are, then I don’t know if scientists have a way to distinguish them. Sorry I can’t be more help!
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I know they utilize most a GC and Mass Spec, a Gas Chromatograph and a Mass Spectrometer, but I've never used either one.
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Sitcom Writer
Is reality TV here to stay?
Programmer
What lessons can you share about past and present start-ups you've worked with?
Firefighter
How can you tell if a fire was arson?
Could you clarify that question? I'm not sure what mean.
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Job requirements depend on the job. Requirements might range from a HS diploma to a PhD. Check the websites of forensic professional organizations (IAI, AAFS, pathology or other disciplines) for job vacancies. I like the variability of the days.I dislike the hours, which can be unpredictable, and require being ‘on call.’
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If the stain is still visible, then clearly the semen is still there, so I see no reason why it wouldn't still have DNA in it. There might be a mixture from swabbing up the skin cells as well as the stain.
Hope that helps!
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