Selma Payne's POV:
Since Adele had been imprisoned in the secret manor, everyone had forgotten her. No one could see her except the guards and the southern Duke. After all, she was already a lunatic that could never be cured. In addition to her embarrassing background, the best way to deal with it was to not deal with it.
Locke's treatment was much more brutal. He was secretly locked up in the palace's underground prison, with layers of seals placed by a werewolf grandmaster. Tracy also used some underhanded means to ensure that he could not move. She had spared Locke's life because he was a tough nut to crack and had value before his secrets were discovered.
These two people, who should have been ignored or closely monitored in the chaos, had disappeared so easily. No one would believe that it was not the work of the cult's wanderers.