10 Worst Serial Killers Who’ll Scare the Hell Out of You

Charles Edmund Cullen (The Angel Of Death)

Do you have a loved one in a nursing home? You might have to check them out again after reading the story of Cullen. This guy worked as a nurse and has confessed to murdering 40 elderly patients from 1984 to 2003. He kept on changing hospitals because of suspected behavior. Ultimately, he was sentenced for life. He said that he poisoned the patients with medications not prescribed of them to relieve them of their suffering. According to investigators, he could have killed as much as 300 people.