Heidi Marie Littlefield allegedly enlisted the help of her adult daughter Logan Runyon to sneak into her ex-boyfriend's home and lace his food with fentanyl.
"Black Widow Murders" tells stories of women who no one would suspect to be so devious, often leaving death in their wake — all in the pursuit of wealth, lust, or power.
“I’m sorry to cause everyone so much pain but I am in Hell and must take Ron with me," Shirley Nelson wrote in one letter to loved ones before she attempted to kill her estranged husband.