It's fairly common for the aggressor in an abusive relationship to take things a step further over time. What starts as a push, becomes a slap, a punch, a full out brawl around the house, and so on. It goes without saying that after that, in some cases, the next step can be deadly. That's not always the case, but regarding Katherine Knight, it certainly was. A butcher by trade, Katherine was used to throwing around large hunks of meat and carving them up, removing meat from the bone with little-to-no effort. She was also a fighter, quick to put her fists up in a fistfight with anyone who crossed her, man or woman. Abusive and manipulative by her very nature, she was a formidable person to cross if ever you got on her bad side.
For all of the men in her life, she was an absolute terror, and those that were lucky enough to survive her wrath are probably grateful every day that they made it out alive. One of them wasn't so lucky, and in this episode we cover everything that led up to that night when she crossed into that last threshold between abuse and murder.