Forensic Scientist

Forensic Scientist

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.

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Last Answer on July 21, 2022

Best Rated

How would you determine if the dye on two pieces of thread are the same? Would you use Ramen Spectroscopy?

Asked by Mike almost 5 years ago

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!

If a person is hung on their knees, when cut down and laid on the back with the knees/gegs still stiff and bent, can the blood still pool to the back?

Asked by TK over 5 years ago

That’s really a question for a pathologist, but apparently lividity develops before rigor, so it shoudn’t shift much after rigor has set in. However that can vary depending on temperature and physical/medical conditions. Blood will pool following the law of gravity but if the legs were bent, restricting the blood vessels, then it might pool in the torso. Sorry I can’t be more help.

Why don’t they let civilians interview suspects?

Asked by Jessica over 5 years ago

Because that's not our job. That's the detective's job. They're in charge of and responsible for the investigation.

Can a fallen fake finger nail show bite mark?

Asked by Aj almost 5 years ago

I don't see why not, it's rigid and would hold a shape. It's a very small item and somewhat brittle, though. I would think it would be tough to bite all the way through one. You'd probably be better off swabbing it for DNA of the biter.

Hi, I’m writing a novel in which a tape-and-murder victim’s remains are found after ten or twenty years outdoors in rural New England. Could investigators find the perp’s dna at that point?

Asked by Laurel almost 5 years ago

On the victim’s body? Most likely not because after that much time the victim would most likely be skeletal remains only, if buried and certainly if on the surface. If the body was in some kind of container, sealed, it might be completely decomposed, mummified or preserved, depending on circumstances. If the killer’s blood or semen got on some object that was with the body, it could conceivably survive if protected, but it would be very unlikely to yield a usable DNA profile.

Hope that helps!!

Also, is it possible to specifically detect that the DNA is from saliva and nothing else?

Asked by AJ almost 5 years ago

I don't believe so, but I haven't done DNA analysis in 20 years so I'm not the best person to ask. I know there's an amylase test for saliva, but I don't know if it's used any more. And if you have a mixture I doubt it would be possible to tell what DNA is from what bodily fluid.

I had crash some OLA 2.5 pills with olanzapine 10 mg tablets together and had kept it. Just few weeks back some police officers came to my house n found it. They tested it with forensic and it came back as heroin.
Please can you explain why

Asked by Malvin over 5 years ago

I’m sorry but I can’t. That’s a question for a toxicologist. I don’t know anything about drug chemistry.