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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986 Questions


Last Answer on July 21, 2022

Best Rated

What types of cases are the most interesting/exciting for forensic scientists?

Asked by brikhaus about 11 years ago

That probably depends on the person, but in general I'm sure we like cases best when we can discover or determine useful facts that help in the investigation. It's not much fun to process a pile of evidence or do hours of work that ultimately (as most of it does) doesn't make much difference to determining or proving who did it. Homicides are, of course, the most high-profile but they also seem to arrive at the most inconvenient times and require hours and hours of working without a break. Personally I'm probably a little happier to solve a criminal mischief than anything else, because they're so petty and pointless--just stupid kids with nothing better to do than be wantonly destructive! At least a burglary has a logical goal. A selfish, inconsiderate goal, but a goal.

Have you ever helped crack a really cold case, or one where someone wrongly imprisoned was exonerated?

Asked by Sara about 11 years ago I've cleared many people but before they were convicted--just routine stuff during the course of an investigation. Of two cold cases that come to mind, in one the guy recanted his confession and eventually won a new trial so I was re-examining evidence, and then just before the new trial he confessed again and went back to jail. Then in the other case, which was quite old, the descendent sued the state for wrongful imprisonment, but the court found that the state had not acted wrongly and  still had every reason to think the guy was guilty and no reason to think he wasn't, so that didn't really change anything, either. Unfortunately many of the other cold cases I've worked on are still cold.  

What are the biggest myths or misrepresentations you see on CSI-type shows about how forensics work?

Asked by Goolia.J about 11 years ago

Oh, where to begin, there are so many.

Okay, #1 biggest: We do not really have a BatComputer! Do you remember the episode where they poured in alphabet soup and it spelled out a message? Real scientific instrumentation does not work that way. We don't have a machine that can accept any type of animal, vegetable, or mineral and tell you exactly what you want to know about it. Instruments might analyze organic material or inorganic material or, like my infrared spectrometer, inorganics but only within certain parameters. For example my atomic absorption spectrophotometer was set up to detect barium, antimony and lead on shooter's hand swabs. The hand could be covered in arsenic and I wouldn't have any way to tell. Materials can be run against a database of similar materials, yes, but databases exist because some lab tech went around rounding up samples of nail polish and created their own. There is no national database of perfume or wall paint or cat food--and even if there was, those items change formula every couple of months. So even if I can easily determine that this fiber is, say, nylon 6,6, there is no database that's going to tell me that it comes from a Halston sweater sold only by Macy's and this is how many they sold in this area and this is who they sold them to and, oh, here's a driver's license photo. Companies do not publish their formulas and stores do not hand out their sales figures (and we certainly cannot 'hack in' and get them). That would most likely be violating SEC and civil liberty laws. Okay, enough of that rant.

#2: Someone like me in Smalltown, Anystate, cannot scan in a latent fingerprint (from a crime scene) and search everyone who has ever been fingerprinted in the entire United States including job applicants and military. Most databases are local, maybe statewide depending on where you are and your software. I can search people arrested in my town, and have been receiving those from the county for a number of years. I do not have access to job applicants, not even our own, and certainly not military. That said, I estimate that in five to ten years I will be able to electronically submit a limited number of latent prints to the FBI's national database, but certainly not yet and certainly not for the past 50 years, as TV shows would have you believe.

Those are the two biggest. Oh, and we very rarely package evidence in plastic, we don't wear skin-tight, designer clothes and high heels to crime scenes (when you work around blood, bleach, dirt and decomp fluid you never wear anything that you'd be upset about if it got ruined), we don't interview suspects or tell the cops who to arrest, and we're not all young, single, sexy and angst-ridden. We're really very ordinary. Though I understand that doesn't make for the most captivating TV character.

In your professional opinion is a degree (undergrad) in biology favored over a degree in forensic science?

Asked by Denise Olivas about 11 years ago

No, I wouldn't say so. I never use a lot of what I learned in biology on the job. It depends much more on where the degree is from, how many years it took, and how much practical experience in crime scene and lab work was included in the curriculum. You might want to call the crime labs you'd want to work at and ask what kind of degrees their employes have.

Can fingerprints be pulled off of nearly anything, or are there some surfaces or materials that simply don't produce good prints?

Asked by dan79 about 11 years ago

The best surfaces for fingerprints are smooth and glossy: clean glass, porcelain, polished marble. It goes downhill from there. The rougher and more porous a surface is, the less chance of finding prints on it. Also if the surface is smooth but if it's covered with dirt or dust--someone who touches it takes away dust instead of leaving a print. Then people's fingers vary greatly in how much sweat and oil will be on the ridges at any given moment--if they're recently washed, if they have dry skin, there will be less chance of leaving prints. Then the environment the object is in--if it's a cool, protected place with steady temperature and humidity, prints can last for years. If it's exposed to light and heat and varying conditions, a print might not last very long at all. Fingerprints are subject to so many variables that we never make an assumption about whether we'll find them or not.

You show up to a crime scene and a man is dead with one gunshot wound to the head, and the gun lying near him on the floor. What are the factors you look at to determine whether it was murder or suicide?

Asked by SJR about 11 years ago

Most people do not leave notes so the absence of a note doesn't really affect things.

Was there any sign of a struggle or forced entry? Is the blood spatter consistent with the position of the body (bearing in mind the injuries--it is possible for people to shoot themselves in the and then be moving around afterwards, it all depends on the power and location of the shot)? Is the injury consistent with a self-inflicted wound (angle, distance). Is there a history of previous attempts, depression or problems? 

When did you know you wanted to work with the dead? Have you always been into the macabre?

Asked by MyTalonz about 11 years ago

I'm not into the macabre (I don't have skull earrings and I don't watch zombie movies...unless Shaun of the Dead counts because I love Simon Pegg) (nothing against zombie movies, just don't seem to catch them) and the only thing I appreciate about the dead is that they're quiet and they don't give me a hard time. I've always been into detecting, is the thing. The problem is I wanted to be a detective like Ellery Queen, work my own hours and then just call everyone into the library once I've figured it out. But I never wanted to be a cop and have to deal with stressed-out people, so being a detective was never really an option. A CSI is just unusual enough to be interesting but just routine enough to keep my inner homebody/bookworm/wallflower self comfortable.