In 1977, high school senior Mary Quigley is found raped and murdered in her hometown of Santa Clara, California. Her murder book begins as detectives photograph the crime scene, trace her activities, and interview everyone she was with that night.

Beauty queen Darlene Doskocil always wanted the easy way out.

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.

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?

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

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.

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

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

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

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

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

The path towards revenge can sometimes lead to murder. It can be quick, fiery and violent. When these women were crossed, they didn't take it lying down. Murder was their answer.

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.

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

These deadly women murder quietly and quickly and in most cases get away with it for many years, until they strike again and a gruesome pattern emerges.

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.