Dr. Peter Drury, played by John Carradine appeared in the 1944 film The Invisible Man's Revenge.
Dr. Drury was a scientist who was involved in some questionable research, and was very eager to find a suitable subject to test his new experimental formula on - a formula for invisibility.
By testing his invisibility formula on Robert Griffin, a psychopathic murderer, he unwittingly gave Griffin the advantage he needed to terrorize the Herricks family who he blamed for costing him his family fortune.
When Griffin finds that a blood transfusion can cure his invisibility, he knocks Dr. Drury unconscious and tranfuses his blood. After performing said transfusion, Dr. Drury dies and his home is set on fire.