She and Bill are notorious for leaving corpses in a trail behind them. In some instances these were folks were not just very familiar with them, but some were rumored to have “known them” in the Biblical sense.
This would be where the trail of corpses ended.
"I couldn't imagine why Billy would haul such a person in the plane with him in public. She was wearing a misshapen, brown, dress-like thing that must have been intended to hide her lumpy body. The garment was long, but stopped too soon to hide her fat ankles and her thick calves covered with black hair. Thick brown sandals did nothing to conceal her wide feet and the hair on her toes.
In that moment, I noticed that the woman emitted an overpowering odor of perspiration and greasy hair. I hoped that I wouldn't gag when she got in the car.
I was stunned [and remember thinking this was] some kind of a sick joke - a woman in a hideous disguise."