The true story of three sisters, their sadistic mother, and their decision to turn her in after she and their father murdered three innocent people.

The terrifying true crime story of abuse and murder at the hands of Shelly Knotek and her husband Dave rocked Washington state in the early 2000s.

A mother of three daughters, Knotek was a master manipulator who inflicted physical and psychological torture on family and acquaintances from an early age.

While the outcome of the trial that landed Knotek and her husband in prison has been well-documented, the details have largely been passed over.

Gregg Olsen is a critically acclaimed writer of fiction and nonfiction titles.

If You Tell chronicles the disturbing life of the murderer, her daughters, her husband, and her victims, exposing the way abuse allowed for the crimes to go undiscovered and unpunished for so long.