Who betrayed Anne Frank?

Rosemary Sullivan is the author of a controversial book on a cold case investigation into what led to young Jewish girl Anne Frank and her family being discovered by the Nazis. The Betrayal of Anne Frank follows a six-year investigation, and identifies a Jewish Notary as leading to the Franks being found, after they'd hidden undetected for two years in Amsterdam. Rosemary Sullivan is a professor emeritus at the university of Toronto and the author of many books including a biography Stalin's Daughter.