A post from another blog.
Donald Harvey (a.k.a. the ‘Angel of Death’)
At the onset of his life, Donald Harvey earned the reputation of a friendly, quiet boy who liked to spend his time “…reading books, and thinking about the future,” according to his mother. After landing work as a nurses’ aide at a young age, he developed the same reputation as an employee… for a while.

Over the years of employment in hospitals (as well as other professions), he murdered approximately 30 to 70 patients, as well as other people in his life. His tool of the trade: secret cyanide poisonings placed in food (or sometimes other methods such as disconnecting life support, or injecting air into a patient’s veins). He began his anointed “mercy” murders on the feeble, terminally ill and dying. But it didn’t take long for his ego to get the best of him, as he took the leap from sainthood to All Knowing God And Ruler Of All Time And Space… killing anyone who annoyed him, got in his way, or that he simply disliked. Actually, Harvey’s habits of murdering patients apparently sparked with someone he considered an offensive “hassle.” His first killing was a stroke victim he spontaneously smothered after the patient smeared feces on Harvey’s face while under his care. Harvey had earned the nickname “Angel of Death” long before he was convicted (or even suspected) because he always seemed to be around when people passed on.

A gay man, Harvey actually tried to murder his own lover at one point. He even tried to secretly poison his lover’s parents after a squabble with them, which landed the father in the hospital with a stroke (which only allowed Harvey to secretly kill him again later with poisoned banana pudding) The mother miraculously survived, despite years of repeated poisoning attempts by him.

Despite several arrests and investigations over the years (and an ever-growing mountain of rumors and bad reputations in various cities), Harvey always lucked out and was able to continue his killings, leaping from location to location. He was not fully apprehended and convicted until 1987, when he confessed to everything during several trials and convictions. He is currently serving out four consecutive life sentences in Ohio, and avoided the death penalty via plea bargaining. He does not work in the prison cafeteria. Lots more here.