23 Medical Professionals Who Were Actually Murderers

H. H. Holmes

H. H. Holmes, sometimes called "America's First Serial Killer," was a medical student and briefly practiced as a doctor in Pennsylvania before he killed between nine and 27 people during the 1893 Chicago World's Fair. Holmes used the secret rooms he had built into his "murder hotel," as well as his medical expertise, to easily kill and dispose of the bodies of his victims, the total of which could ultimately have reached 200. He was eventually hung for his crimes in 1896, and asked that he buried with a cement carrier so that grave robbers couldn't desecrate his remains.