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.
The vast, vast majority of people who kill people didn't plan to kill someone, so they often leave fingerprints, blood, witnesses, text messages, and then come up with some sort of story that sounded good in their head but wouldn't fool a 6 year old.
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Yes, the arcsin of the width divided by the length of the stain will give you the angle of impact at which the blood struck the surface (usually a wall). The direction of the stains can be traced back to a point of convergence and from there the angles can be traced back to a distance from the wall, giving you the approximate point in space where the blow was struck.
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They might. I couldn't say for sure one way or the other.
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As I'm not trained in digital forensics, I'm afraid I wouldn't know. PS the purpose of this website is not really so that you can cut and paste your homework and get other people to do it for you.
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Certified Nurse Aide
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Gunshot residue can actually refer to two things, gunpowder that flies out of the barrel with the bullet and can land on the victim, and primer residue that can leak out of the back of the bullet cartridge and spray out onto the shooter's hand. But it can also get on the gun or nearby surfaces or people so presence of it on hands does not prove someone fired a gun, and it can wipe off easily so absence of it doesn't prove they did.
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Usually, as far as I know, the detective is in charge of the investigation. The CSI doens’t work for them but is there to provide technical support and advice, but ultimately, the detective has the final say. And unlike TV, the detectives are interviewing witnesses and deciding who to arrest. Best of luck!
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I use it the way you use your computer without writing code. I have chemicals that I use to process for prints, but we just purchase them. There are a few reagents we mix ourselves. At the coroners office we mixed almost all ourselves. A toxicologist, on the other hand, would use it every day.
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