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

When women have been raped and they do a rape test kit, how can forensic scientists determine if the woman was raped or if it was consensual sex?

Asked by Steffaney Espinosa over 8 years ago

The rape kit will only show biological evidence of another person besides the victim. Bruising, injuries and testimony will be used to determine whether it was consensual or not.

You are testing a swab that has DNA on it, but you don't know if it's saliva/ skin cells/urin/blood.How long does it take to determine what it is and find out who it belongs to?Which steps do you have to go through and how much does it cost pr test?

Asked by Ayden over 8 years ago

Usually we can assume what kind of cells will be on it depending on where it was collected from—if from a pop can, it will probably have saliva and skin cells. From underwear might have semen. If from a dark stain, probably blood. How long it takes depends on the type of analyses done and the type of DNA testing—STR, ySTR, mitochondrial, etc. It will take at least a day or two, and after that it depends on the lab’s backlog. We send our DNA to a state lab and it will take between a month and four months to get the results back. If detectives or prosecutors want it faster and someone’s budget is willing to pay for it, we can send it to a private, accredited lab and pay for a faster analysis. They can do it in as quickly as three days or up to a week or two depending on what you want to pay for. If you want it in a week it will cost a few thousand dollars—something like $600 a sample plus upcharges for expedited service and an overall charge, if I’m remembering correctly. If you want more like three days it will be more like $5000. That’s for the basic three samples—victim, suspect and questioned sample.

I ask because I saw Saw VI that day I think & they took prints off a guy's closed eyelids. Speaking of which, they found traces of Freon R-12 within the prints, as the hand possessing them was removed from a 'corpse' & refrigerated. Is that possible?

Asked by R-Mod over 8 years ago

I am not sure that it would be possible to detect freon, particuarly the type of freon, as I have no idea what instrumentation would be used or its limits of detection or what effect contact with live or dead would have on the compounds, whether it would tend to react with them or not. I do think it's highly unlikely they would look for that as they would most likely, after the prints had been developed and photographed for the ridge detail, swab up the prints and test them for DNA from the person who left the prints. That process would be designed to detect DNA and nothing else. I suspect these results would come from a magical movie 'Batcomputer' that can tell you every single thing about anything on the planet you drop into it.

Hi so I'm doing a school project on a career I want to do and I was wondering if there was any chance I was able to ask you questions about Forensic science and pathology?

Asked by Bri over 8 years ago

Sure, email me at lisa-black@live.com

What is the exact name of the job that is involved in collecting evidence and analyzing it, or is there no such thing? Like for example, does a Crime Scene Investigator's job include gathering evidence from the crime scene and later analyzing it?

Asked by Aman over 8 years ago

That’s a good question, because there is no hard and fast rule—your title is whatever your boss says it is. A CSI may work only at crime scenes or may also do any office or lab analysis as well, it depends on how big the unit is and how work is distributed.

Can you tell the difference between blood from a cut and blood from a hemorrhage under a microscope?

Asked by Carla over 8 years ago

I couldn’t. I don’t know if a pathologist or biologist could.

when you find that you have a cold case, how do you find breakthroughs? Or are they almost pure luck?

Asked by NB over 8 years ago

That’s more of a question for detectives, since ‘solving ‘ the case is their responsibility—I’m just there to provide forensic support. But in the cases I’ve been involved with, luck is of course a huge factor.