A look at two of the most notorious female killers in recent memory.

Karen Lyn Dalton was a meth addict seeking revenge against her roommate who pawned off all of her jewelry. What ensued was the one of the most sordid accounts of torture in the history of California.

Sheila LaBarre hated men. She hated them so much she would entice younger men to her farm with the promise of sex only to torture and kill them.