There was a small button under the desk, and its use was to call the guards in. Elizabeth's finger was caressing it. But when Holliday mentioned that the professor had already been dead, it suddenly moved off. In this second, the dots inside Elizabeth's mind connected into theories. She extended her chin and neck towards Holliday, as if inviting him to snatch it with his hands in anger, spitefully indicating that she was not afraid. But despite already being convicted for life, Holliday did not let anger take the better of him.
"Sir, I know it was not you who killed the professor." Instead of the alarm, Elizabeth tapped her communication device, and it was now recording sound.