Investigators turned to Paddock’s physician. The doctor described Paddock as “odd” and as a man who showed “little emotion.” He believed that Paddock may have had bipolar disorder but told police that his patient had refused to discuss the issue further. Paddock didn’t appear to be abusing any medications, the doctor noted. In fact, he seemed fearful of medication in general. While he had been treated for anxiety, Paddock had refused antidepressant medication.