 - 1 enrolled in methadone or buprenorphine treatment in the community at the time of arrest; 2 having a medical liver failure, congestive heart failure or psychiatric condition e.g., suicidal ideation, psychosis that would make participation unsafe in the judgment of the medical staff or the PI; 3 pregnancy; 4 allergy to methadone; and, 5 requiring treatment for alcohol or sedative hypnotic withdrawal. 