Psycho! >:)

He used to work at a hospital and was employed by the corporation as a dentist. He lost the ability to distinguish between patients and anomalies, but the anomaly bit him without him even noticing. He gradually went insane and was taken to a mental hospital. Then he escaped from the mental hospital and went to the same hospital where he worked. When he arrives, he spouts nonsense about having worked there. If he's admitted, they give him a 30-second timer to restrain him. If he's not restrained, he becomes an anomaly.