There was no reports of blood or signs of a struggle. Water in the bathroom would have evaporated. Towels on the floor or other common messiness wouldn't be seen as room as disordered or cause for concern. He is dead in his bed. No apparent signs of struggle. No blood everywhere. It probably didn't look like a crime scene. We don't know if his door was deadbolted which would imply that no one exited from the door. And, surveillance would most likely be saved and/or checked to make sure there was not another person in the room. I think it is probably a medication related accident and the family knows this.