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.
I'm sorry, I wrote a whole answer to this but somehow it didn't post. It may, depending upon how much different from real blood the fake is, for instance if it's significantly more or less dense. But in terms of fluid characteristics it may not change it enough to even be noticeable or make much of a difference in the final analysis.
Email me at Lisa-black@live.com and I’ll send answers.
I don't know what you mean by that--DNA is DNA. Samples being switched is one situation, and contaminated is another. Obviously the situation would have to be remedied and the samples re-analyzed. Questions will probably be a combination of general interview questions such as 'what are your strengths' and questions about your specific training and experience in forensic topics. Good luck!
As far as I know, the chlorine bleach alone will do it.
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According to a little chart I have tacked up above my desk, livor mortis sets at about the same time as complete rigor mortis, so it could be possible. But you really need a pathologist to answer that.
From live people we usually take a buccal swab from the inside of the mouth. From a deceased person, we can use any part from which we can extract DNA, such as blood, bone, teeth, etc.
Whether a surface is soft or hard wouldn't affect the presence of lividity or rigor mortis, they would develop regardless. It might affect the pattern of lividity (whiter at the pressure points).
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