Donald Harvey

Donald Harvey (April 15, 1952 – March 30, 2017) was an American serial killer. He claimed to have murdered 87 people, though official estimates are that he has from 37 to 57 victims. 
Harvey said he started out killing to "ease the pain" of patients. As time progressed, he began to enjoy it more and more and became a self-described "angel of death". Harvey was serving 28 life sentences at the Toledo Correctional Institution in Toledo, Ohio, having pleaded guilty to murder charges to avoid the death penalty. His inmate number was A199449.
On March 28, 2017, authorities reported that Harvey had been found in his cell severely beaten. He died on March 30, 2017.
He is killed by James D Elliot.