This study examined the ethical and professional judgments journalists consider when deciding to trust a whistleblower and determined how whistleblowers influence ethical and newsgathering processes. With a qualitative study, this research uncovered common ethical and procedural considerations journalists, who are influenced by gatekeeping forces, make when presented with information from a whistleblower, with the goal to create a conceptual model—an “ethical algorithm”—that journalists employ when deciding to publish whistleblower disclosures. In addition, the decision to build a trust relationship with a whistleblower is examined from the frameworks of ethical considerations, professional standards, and ethics codes. Finally, the journalist–whistleblower relationship is considered as a form of social exchange, a negotiated relationship in which parties determine trust as a result of an exchange of mutually beneficial acts.