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.
Take all the science courses you can, and visit and talk to forensic science personnel. You'll find them very approachable.
First question: My guess is (simply based on experience) is there would still be sticky blood at the head wound enough to smear on stuff, perhaps. It wouldn't be spurting or perhaps even dripping at that point because it should have begun to coagulate. Provided it didn't dry entirely, so the body would need to be in a place that's neither too dry nor too hot and certainly not both. Cool and humid would keep it from drying. The killer might bash the head but there could be a lack of blood spatter or flowing/pooling blood from the wound, since the blood won't be flowing as it would be if the person had still been alive. Also the problem with moving the body is lividity where the blood pools at the lower spots of the body due to gravity (like on the back if the person is lying supine. After several hours it should be fairly noticeable and then if you move the body, the lividity pattern doesn't quite match the position.
Hope that helps!
I'm so sorry but I wouldn't have any idea since I've never worked in toxicology. And since my agency doesn't do it either I don't have anyone to ask.
I loved mystery shows and books when I was a kid. I always wanted to be a detective, but didn't want to be a cop. And I always liked science.
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Take a lot of science classes, and keep up your English skills.
Plan to go to college and study biology, and try to find a college that has the specific major and courses you want.
They could try not to leave it in the first place--wear gloves and a hat, and don't cut yourself on the window you broke to gain entry. And wear a mask since you never know who has cameras where in this day and age!
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