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.
Having to testify in court, which is the most awful kind of public speaking ever because there are people there trying to make you look incompetent. You deal with it by practicing and preparing and training yourself not to take it personally. The other challenge is learning to communicate, in different ways with different groups. With victims and family/friends of victims, you have to be empathetic without talking to them about the investigation, because that's the detective's job. With co-workers, detectives and cops, you have to give them all the information they need or want without bruising their egos. This takes practice and focus.
I very much doubt anything self-ignites, but I'm not an expert on explosives. But where oil is concerned I'm fairly sure you would need a spark to ignite it.
Okay, I emailed you.
I did not know gooseflesh was a characteristic of rigor, and if I'm understanding rigor to mean rigor mortis then of course they'd already be dead before reaching that stage. But as for how likely it is that pre-mortem gooseflesh would remain after death or be affected by freezing after death, I'm afraid you'd have to ask a pathologist. I don't have the expertise to answer that.
Special Education Teacher
CPR Trainer
Help Desk Technician
As far as I know--and I am not a DNA expert--multiplying the frequencies of each allele tested is what gives us the astronomically high numbers of elimination of people having that same set of alleles. A SET of data points eliminates many more people than a single data point, in other words.
I don't know too much about indented writing but I would suggest using alternative light sources like IR or UV.
In general and barring other explanations, if the area around a hole caused by a bullet is gray that is caused by fouling, or vaporized lead from the bullet exiting the gun within approximately 6 inches of the hole. That would indicate that the hole is an entrance. Is the gray on the inside or the outside of the hat? I can't explain why there would not be blood on the hat (again, are we talking the inside or the outside?) unless it was literally blown off the head before the blood began to spill, but that is unlikely in the case of an exit I would think.
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