" Anything could be a weapon. The kids knew it. Dave too. A spatula from a kitchen drawer, a fishing pole, an electric cord. Shelly Knotek would employ all of those—and anything else within her grasp—to beat her girls if she perceived they’d done something wrong. No matter how big. Or how small. When she found a punishment that worked, she looked for ways to make it even more effective, more brutal. The act of beating her children seemed to fuel her and excite her. She seemed to savor the rush of adrenaline that came with being on the attack. “Discipline” came "

― Gregg Olsen , If You Tell: A True Story of Murder, Family Secrets, and the Unbreakable Bond of Sisterhood