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.
If you look through previous answers you'll find a number pertaining to this. Each agency and position may have different requirements so the only way to know is to call the places you are interested in working at and ask them. For my current job I only need a high school diploma but we all have at least a Bachelor's degree. If you want to do DNA analysis they may require a PhD. I applied to the police department that posted the vacancy. Most have online postings now so it's pretty easy. Yes, I've had a lot of continuing education through other police departments and forensic organizations.
When I was at the coroner's office, a typical day would be examining victim's clothing from a homicide or suicide, typing blood samples and testing gunshot residue samples. Now at the police department, a typical day is spent in front of the computer putting in latent prints that the officers or I have lifted from items and searching for a match, or checking past searches of new people put in the system. Then I might go out to process a burglary scene.
I'm sorry, I"m sure I answered this question months ago, I don' t know why it didn't post. The answer is there's no way to guess, a doctor would have to look at it. If there's no tissue, DNA might possibly be obtained from bones or teeth.
Who knows? It all depends on where the samples were and how thoroughly the surface was cleaned. If blood was on a glass window and it was thoroughly cleaned, then all of it is probably gone for good. If it's a porous bare wood, then probably not...unless it was thoroughly soaked with a bleach solution. If it's a large area, even if it's cleaned there might still be some left in the nooks and crannies--like in a tile floor, the ceramic may be clean but the more porous grout between the tiles might hold a substance. So there is no way to say it's always possible or it's always not possible. PS Luminol helps you find blood. Christmas Tree stain is used to stain a dried semen sample on a glass slide. It doesn't help you find the semen in the first place.
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I'm afraid I'll need some more details than that.
It depends entirely on where you work. The requirements are whatever your employer says they are (same with your job title). DNA analysts are often required to have a PhD in genetics. At the coroner's I had to have a BS in one of the natural sciences. At my police department they only require a high school diploma, but give extra points for advanced schooling so we all have BSs. The best way to get an idea is to go to different agencies' websites and look at help wanted postings.
It depends on the crime, but in general I guess you look for how the perpetrator got in, how they got out, and what they disturbed while they were there. Then I look for what we could get information from (such as surfaces that they had to touch that are smooth and glossy and might have prints, whether they left blood or bodily fluids behind that could be tested, whether they wrote something or used something that could point to their identity, etc.).
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