Muller had been working to cure progeria, a genetic condition which affected his brother. Muller worked for Avalon as their top scientist but left after he failed to find a cure and his brother died. He took up new work at a free clinic. Muller tells Karas that "No one ever leaves Avalon", throwing the corporation under suspicion. Karas visits Paul Dellenbach, one of Avalon's CEOs and questions him about Ilona. On suggesting he may have been sleeping with her, Dellenbach replies "I sleep with my wife, I sleep with my secretary, I even sleep with my sister-in-law but I would never sleep with one of my researchers".