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

Is it true that a females DNA can't be used to trace paternal male lines? How would I trace my fathers ethnicity with him gone and no brothers?

Asked by L.Randolph over 9 years ago

I'm not a DNA expert, but I know that half the 23 chromosomes in a person''s nuclear DNA come from one parent and half from the other parent, so part of the father's DNA would have to be present in the child.

Mitochondrial DNA (which is a different substance entirely, a circular structure present in the cell's mitochondria, whereas nuclear DNA is a double helix present in the cell nucleus) is passed from mother to child without recombining, so only the mother's mitochondrial DNA is present in the child. We test for mitochondrial DNA when nuclear DNA isn't available, like when we only have cut hair or fingernails or old bone to work with.

Are you required to be a police officer before becoming a forensic scientist? Also do you know of any jobs in forensics or any crime scene jobs in general that don't require being a police officer first?

Asked by Allie over 9 years ago

Many if not most crime scene and forensic work job are now civilian, which means you don't need to become a police officer and are not trained at the police academy, etc. Some agencies do have their forensic staff become sworn officers, so the only way to know is to ask. I've worked in forensics for over 20 years now and I've never been a police officer.

What is your opinion on te csi effect and what concerns do you have about it?

Asked by Kerena over 9 years ago

It's concerning because juries expect more than is reasonable. Not every case is going to have DNA evidence and you don't always find fingerprints on a surface and eyewitness testimony sounds convincing but can be very unreliable. However an expert can hopefully explain all these issues to make the limitations clear, provided the jury listens.

if dna or other evidence could be reproduced by a 3d printer how would this effect forensic

Asked by viorgateway over 9 years ago

I'm afraid I don't know enough about how 3-D printing works to be able to answer. I can guess that it might be handy for reconstructing items such as shoeprints and tire tracks from photos or scans. Other than that I don't see where making a copy of something would necessarily affect a crime. And as far as I know they haven't reached the point of replicating on a cellular level such as DNA.

How to chemically distinguish between an original hand-written signature and a printed copy (the one that is scanned and then printed)

Asked by rixy about 9 years ago

I'm sure document examiners could do this fairly easily but I don't know exactly how. I would guess that alternative light source (like infrared or ultraviolet spectrums) could show that there is no difference between the signature and the rest of the document. Or I believe thin-layer chromatography could show that the chemical makeup is the same. A Questioned Document Examiner could tell you much more.

I am attending Pace University this coming fall with a degree in Forensic Science, any advice for a soon to be Forensic Scientist?

Asked by ssosiak1 almost 9 years ago

You can't go wrong with a lot of science classes. When I was in college they didn't have courses specifically in forensic science, so that wasn't an option. And different agencies will have different requirements, so you might want to go online and check out the different vacancies to get some idea of what requirements are out there. You can also call labs you're interested in and ask, that way you get to 'meet' some people too.

Is there a license required to become a forensic scientist? If so, what type?

Asked by Violet about 9 years ago

No. Depending on where you work and what you do, your employer might want you to be 'certified' in one area or the other.