Some women can’t resist boy toys. But fur flies when these women reveal they're "Killer Cougars.” 39-year-old Dr. Shirley Turner exposes some skeletons in her closet: a history of affairs with younger men all ending in rejection that Shirley could not handle.

Jeanne Harrington’s marriage to Michael Gabel was on the rocks. The couple were constantly fighting and instead of talking it out Jeanne took things into her own hands… in more vicious ways.

Desperate for money to feed her drug addiction Maria del Rosio Alfaro murders a nine year old girl she's watching so she can steal money from her house.

17-year-old Natasha Cornett and her goth gang went on a killing spree.

Want to know whatever happened to Jane Andrews, this Deadly Woman? Pat Lalama fills you in on the details.

Susan Eubanks killed her four sons in an execution style slaying to punish her husband for leaving her.

Betty Neumar married 5 times over a 50 year period. Each marriage ended in a suspicious death.

Penny kills her only daughter when her boyfriend, in a fit of anger, tells her she must choose between them-and she does.

Beauty queen Darlene Doskocil always wanted the easy way out.

Are they lovely or lethal? Catch an all new season of Deadly Women, Thursdays on Investigation Discovery.

Griselda Blanco was a woman to be reckoned with in Miami as leader of a drug ring. She shows no mercy in having her own thugs taken out-even when the 6 year old son of her henchman is accidentally killed.

Brittany Norwood has a history of stealing, she murders her work colleague after being caught stealing from the store.

Breaking the norms of child killers, ten year old Mary Bell murdered two young boys in Newcastle, England.

Egyptian born model and nanny Omaima Aree said, "Nothing tastes as good as the man I married." She killed dismembered, ground up, cooked and ate her husband of two months.

Who's the deadliest woman of them all? Vote for your choice among the "Deadly Women" on InvestigationDiscovery.com and your selection could be featured in July's special countdown episode.

Lizzie Borden, American most infamous murderess. Born into a wealthy respected family, Lizzie was a quiet, Sunday school teacher - that is until she took an ax and hacked her stepmother and and father to death. Or did she?