This is the unbelievable case of Nannie Doss (birth name Nancy Hazel). All we can say about this one is Holy Shit. Put down your prunes if you are eating any before listening. 
The Story Of Nannie Doss, The "Giggling Granny" Serial Killer (allthatsinteresting.com)
Nannie Doss - Wikipedia
Black Widow: The True Story of Giggling Granny Nannie Doss (Ryan Green's True Crime): Green, Ryan: 9781097268535: Amazon.com: Books
Music By: Jonas Bjornstand
Cover Art By: Charnell