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

Hello Lisa, what is the dumbest case you ever worked?

Asked by Steven about 4 years ago

Nothing's really 'dumb' since every case involves, a minimum, property loss or inconvenience. Criminals can be dumb...the best example I can think of was when a bunch of boys broke the glass in a door to get into a jewelry store, couldn't find much to take, then were hightailing it out of there as the alarm rang and one was trying to climb back out the broken window and not having much luck when his buddy barreled through the other door simply by pushing the push bar on it. The video was hilarious.

Do witnesses often test positive for GSR residue on their hands? How close would they need to be when the firearm is discharged?

Asked by Cat twigg over 4 years ago

I couldn't tell you--I haven't personally done any studies of bystanders at a shooting. GSR analysis is usually testing for primer residue, which can escape from the gun when fired. So someone could have GSR on their hands if they handled a gun, if they touched a surface near to where a gun was fired, if they handled the gun after it was fired, etc. This is why, though they've stated this on television every day for fifty years, having gunshot residue on your hands doesn't prove you fired a gun. Not having gunshot residue on your hands doesn't prove you have not fired a gun. The particles are very tiny and easily dislodged. These are some of the reasons why most agencies don't do gunshot residue analysis any more. Hope that helps!

Another question is it true that there is no such thing as totally useless evidence? How much useless information has to be sifted through? I am sure this is more of a detective proble but I’m sure you have to deal with it too right?

Asked by Bobbie-Sue over 4 years ago

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.

On a scale of 1-10 how hard is it to be a forensic scientist.

Asked by Fayyad over 4 years ago

7

someone is alleged to have worn a t-shirt for over twelve hours on an 88 degrees day,dancing,drinking,and playing pool,but DNA testing revealed none of his DNA was found in said shirt.What are the odds of that,if not possible?

Asked by filomenasmith@yahoo.com over 4 years ago

That sounds odd, but were they looking for blood or semen stains in particular, or just the DNA of whoever wore it?

What kinds of people do you both love and hate working with? Thanks

Asked by Liam about 4 years ago

Well, as in any job, I like working with people who are competent, responsible and pleasant, whether they're forensic techs, cops, attorneys, or victims. And I dislike working with the opposite qualities.

how long can a DNA be found on a dried semen stain on skin considering the swab was taken after ejaculation's by more than 36 hours and the skin area haven't been washed

Asked by jo almost 4 years ago

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!