Donald "Donnie" Harvey, also known as The Angel of Death, was an angel of death-type serial killer, poisoner, and one-time arsonist. As a resurrected ISG member and within the circuits, he's nicknamed "The Good Doctor". Harvey primarily targeted patients at the hospitals where he worked, yet also killed other victims (usually people who made him paranoid or crossed him in some way). He usually killed them either by smothering them with a pillow or plastic bag, setting up their deaths to look like accidents (such as giving them faulty medical equipment, overdosing them on medication, etc), and mainly by using various poisons (usually cyanide or arsenic), which he usually injected through medical equipment or foods and drinks.