Murder and Mayhem: A Doctor Answers Medical and Forensic Questions for Mystery Writers, by D.P. Lyle, M.D. is a cornacopia of those "little details" and mysteries of the Universe broken into 3 sections:
I. Doctors, Hospitals, Illnesses & Injuries
~ Tramatic Injuries and Their Treatment
~ Environmental Injuries and Their Treatment
~ Doctors, Hospitals and Paramedic Personnel
~ Medications and Drugs
~ Diseases and their Treatments
II. Methods of Murder and Mayhem
~ The Effectcs of Guns, Knives, Exploseives and Other Weapons of Death
~ Poisons and Drugs
~ Medical Murder
III. Tracking the Perp
~ The Police and the Crime Scene
~ The Coroner, the Crime Lab and the Autopsy
He also includes a chapter on "odds and ends."