This paper discusses the oral historian’s roles in interviews in which crimes are revealed. It first looks at cases with the primary aim to collect information about statute-barred crimes. Secondly, it discusses cases in which the researcher does not study crimes, but the interviewee wants to disclose them. In the first case, the historian encourages the narrator to talk about crimes; in the second case he encourages him to keep silent. Oral historians should never accuse, reproach, or give therapy. They should not inform the authorities but encourage the narrator to do it himself. Finally, it is suggested that the oral historian should be bound to professional secrecy.