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

What has been discovered or invented by you or other people who work in the field of forensics?
What is something I could tell my class and teachers that would surprise them about forensics?

Asked by Ella over 5 years ago

"Touch" DNA or "Contact DNA" can obtain a profile from an item that someone merely touched: https://en.wikipedia.org/wiki/Touch_DNA

I would say Rapid DNA, which can provide a profile in less than two hours and used in the battlefield, but that's been around since 2014.

And though you've seen it on TV every day for 50 years, it has not been possible for the average latent print examiner to scan in a fingerprint and search every person who's ever been fingerprinted, including job applicants and military. Most databases would be just county or state wide, and may or may not include job applicants (or staff) depending on the preferences of the agency, and certainly not the military, ICE or Interpol. At my department we only got the ability to remotely search the FBI database last year.

Hope that helps!

Do you work with cops on the regular?

Asked by Ronna about 6 years ago

I work in a police department, so yes, work with them every day.Though my immediate coworkers and immediate supervisor are all civilians.

When you started work in forensics did your job train you or were you having to rely on what you learned in college?

Asked by jsk789 over 5 years ago

They didn’t have forensics degrees when I went to school, so learned all the forensic tasks were on the job or continuing education courses. But the science background helps with understanding lab procedures, preparing reagents, and of course explaining what’s going on during the various processes.

I need to know how can I get blood group from old dried blood?

Asked by Mou over 5 years ago

They used to do that in serology, taking threads soaked in the blood and putting them in tiny pools of blood type reagents. I don’t know exactly what the reagents were, sorry, that had never been part of my duties. But if you research old serological techniques you should find it.

Best of luck!

What is the most complicated case you’ve ever worked and why?

Asked by Captain Coke almost 6 years ago

I can't think of any one in particular that was the most 'complicated'--many were difficult and complicated for different reasons. Forensics is only part of the whole investigation, so things really get much more complicated for the detectives who not only have to absorb the information we're giving them but deal with victims, witnesses, suspects, documentation, records, warrants and prosecutors. I worked one where the victim had been taken to three different places before the body was dumped and burned, so there were indoor scenes, outdoor scenes, the suspect's house to deal with. Right now we're dealing with one that spans 30 years, so trying to find reports and piece together who did what and when and what, if anything, still remains to be done. And we had one earlier this year that had inexplicable behavior by about 9 different people over three days and all to cover up an accidental death. Hope that helps.

How long does saliva DNA stay on an object? In other words, for how long the DNA is detectable?

Asked by Aj over 5 years ago

That depends entirely on the circumstances. If a sample of anything--blood, saliva, semen--is properly dried and kept in relatively dry conditions at a steady low temperature, or even frozen, it can last for decades. If the temperature and humidity vary greatly, then the sample could break down. If it's stored in plastic or airtight when wet it could rot and decompose.

What level math do you actually need and use?

Asked by Elizabeth G. over 5 years ago

It depends on what you want to do. I've always used only basic addition, division etc., for calculating reagents. Accident reconstruction would probably require a bit more and maybe DNA analysis, but I don't really know. Best of luck!