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.
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.
I'm sorry but I really don't know.
I haven’t worked any really crazy ones, and sorry but any semi crazy ones would take too long to explain.
From an object? Sure, if you clean the surface thoroughly.
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Private Detective
Examination of the heart would be done at the autopsy by a pathologist, and since I'm not a pathologist I'm afraid I cannot address your first question.
Inside a fresh body bag that's zipped up.
Over the years I've operated a Fourier Transform Infrared Spectrometer, an Atomic Absorption Spectrophotometer, alternate light sources, a photography setup, and various software programs. Venders or other employees train me to use them.
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