The Rowling Protocol, Steven Bannon, and Rogue POTUS Staff: a Study in Computational Authorship Attribution

A key step forward in the professionalization of forensic science is the development of standards of practice and protocols. Based on his analysis of theRowling case, Juola (2015) proposed a systematic protocol for authorship verifi-cation. We present both a theoretical and an empirical analysis of the accuracyof this protocol. We further present a demonstration of this analysis in terms of ahigh-profile case of political activism. We show that this protocol produces accurateand understandable analyses of the likelihood of common authorship.