Question

Crime show fic-writers, perhaps you can answer this: Is there a resource out there about the various suspicious ways people can die and what the signs are/how they can be tested for? Say, for example, you're writing something where it looks like a victim has died in an obvious manner (gunshot, knifing, etc.), but the ME thinks something more subtle was the real cause of death, and must run a test of some sort to determine whether the hypothesis is correct. Where might one come up with the "something more subtle" and the name of the test? Or at least a general type of test that might be run? (The real cause of death would preferably be something it's easy to miss signs for.)