In writings on Liston, he is portrayed as a man of strong character and ethics, which was the source of some of his confrontational style. In one case, he confronted a medical colleague (Dr Robert Knox) over the treatment of a young woman (Mary Paterson) who it later transpired was murdered (see Burke and Hare murders), with Knox thought complicit in the murder. She was in Knox's dissecting rooms within four hours of her death, and kept in whisky for three months before dissection, during which time she was essentially on voyeuristic display. Liston's response is documented in a letter from himAccording to Liston, he saw Mary Paterson's body in Knox's rooms and immediately suspected foul play. He knocked Knox down after an altercation in front of his students – Liston assumed some students had slept with her when she was alive, and that they should dissect her body offended his sense of decency. He removed her body for burial.