Velma Barfield was a North Carolina caretaker who became one of the most notorious female poisoners in U.S. history. Between 1971 and 1978, she quietly murdered multiple people in her orbit- beginning with her husband, Jennings Barfield, who died in a suspicious house fire while he slept, and later her own mother, along with an elderly couple she stole money from. Her final victim was her boyfriend, Stuart Taylor, whom she poisoned after he discovered she’d forged his checks.