We are also deeply indebted to many specialists who endorsed our investigation and who assisted us frequently in their areas of expertise. We called them our subject matter experts, or SMEs. They are Roger Depue (retired FBI behavioral science specialist); Bram van der Meer (investigative psychologist and offender-profiling expert); Frans Alkemade (forensic statistician); Bernhard Haas (forensic document examiner); Wil Fagel (former NFI handwriting expert); Carina van Leeuwen (head of police cold case team Amsterdam); Menachem Sebbag (chief rabbi at the Dutch Ministry of Defense); Leo Simais (cold case team, Dutch National Police), and Hans Smit (Dutch National Police)。 We wish to thank the archivists who aided us: Peter Kroesen and Eric Heijselaar (archivists, SAA), Hubert Berkhout (archivist, NIOD), and Sierk Plantinga (retired archivist, NA)。 As laymen in the field of digital storage and AI, we also owe gratitude to our digital consultant Quentin Plant. Last, we thank the following authors and historians who were so important to us: Gerard Aalders (historian), David Barnouw (historian), Gertjan Broek (researcher, AFF), Corien Glaudemans (researcher, HGA), Ad van Liempt (journalist and author), Guus Meershoek (historian), Erik Somers (historian), Gerrold van der Stroom (historian), and Sytze van der Zee (journalist and author)。 (Though we studied and cited and much appreciated their work and in some cases consulted with or interviewed them, these authors and researchers should not be assumed to be supporters of the outcome of our investigation. Indeed, they may not have been informed of our final findings.)
And then there are all those people who provided personal assistance in a different way and on a less frequent basis. These could be witnesses, authors to whom we spoke, archivists who helped us navigate vast public and private records, family researchers and historians, and people representing important institutes.
In alphabetical order, we would like to thank Guido Abuys (Camp Westerbork), Jelmar Ahlers (relative of Tonny Ahlers), Edith Albersheim-Chutkow (Holocaust survivor), Svetlana Amosova (Jewish Museum and Tolerance Center, Moscow), Floriane Azoulay (Arolsen Archives), Freek Baars (Spaarnestad Photo), Francis van den Berg (Historisch Centrum Overijssel), Albert Beuse (Groningen Archives), Rene Bienert (Simon Wiesenthal Center), Gerrit and Sien Blommers (neighborhood experts), Mirjam Bolle (Holocaust survivor and former secretary of the Jewish Council), Petra Boomgaart (historian), Eric Bremer (relative of Jetje Bremer), Monique Brinks (historian), Jeroen de Bruyn and Joop van Wijk (coauthors), Peter Buijs (Jewish Historical Museum), Cornelis Cappon (University of Amsterdam), Greg Celerse (World War II researcher), Marcelle Cinq-Mars (Library and Archives Canada), Sara-Joelle Clark and Ron Coleman (United States Holocaust Memorial Museum), Alexander Comber (Library and Archives Canada), Ryan Cooper (pen pal of Otto Frank), Jopie Davidse (World War II resident of Amsterdam), Peter Douwes (relative of Cor Suijk), Jan Erik Dubbelman (friend of Cor Suijk), Rebecca Erbelding (United States Holocaust Memorial Museum), Zeno Geradts (professor of forensic data analysis, University of Amsterdam), Joop Goudsmit (Dutch Holocaust survivor), Koos Groen (journalist and author), Louis de Groot (Dutch Holocaust survivor), Katja Happe (historian), Ron van Hasselt (author), Hubertine Heijermans (relative of Hubert Selles), René van Heijningen (historian, NIOD Institute for War, Holocaust and Genocide Studies), Maarten van Helden (son of Detective Arend van Helden) and his wife, Els, Stephan van Hoeve (son of greengrocer Hendrik van Hoeve), Jan Hopman (journalist and author), Fleur van Houwen (linguistic expert, Free University of Amsterdam), Ann Huitzing (historian), Abraham Kaper (grandson of Abraham Kaper), J. van der Kar (notary), Christine Kausch (historian), Nancy Kawalek (professor, University of Chicago), Edwin Klijn (researcher, NIOD Institute for War, Holocaust and Genocide Studies), Teun Koetsier and Elbert Roest (coauthors), Bas Kortholt (historian), Hans Krol (historian, Noord-Hollands Archief), Gerlof Langerijs (history researcher), Carol Ann Lee (author), Richard Lester (author), Jacqueline van Maarsen (friend of Anne Frank and author), Myriam Maater–van Hulst (Holocaust survivor), Eva Moraal (historian), Claudia Morawetz (daughter of the composer Oskar Morawetz), Melissa Müller (author), Sylvia Naylor (National Archives at College Park), John Neiman (friend of Miep and Jan Gies), Jean Nieuwenhuijse (Centraal Bureau voor Genealogie, Den Haag), Albert Oosthoek (historian, NA), Jan Out (Dutch National Police Archivist), Albert Penners (physiotherapist and informer), Joost Rethmeier (historian), Jan Rijnders (historian), Sally Rosen (investigator), Regina Salle (witness), Eva Schloss (Holocaust survivor and stepdaughter of Otto Frank), Kyra Schuster (United States Holocaust Memorial Museum), Raymund Schütz (historian), Derek Selles (grandson of Hubert Selles), Eda Shapiro and Rick Kardonne (coauthors), Eric Slot (historian), Dineke Stam (former researcher, Anne Frank House), Jol van Soest (family historian), Michel Theeboom (Dutch National Police/Jewish Police Network), Paul Theelen (family historian), Stephan Tyas (historian), Jacob Nathan Velleman (psychiatrist), Rian Verhoeven (historian), Gerrit van der Vorst (historian), Hugo Voskuijl (relative of Bep Voskuijl), Jan Watterman (historian), Rene Wessels (relative of former Prinsengracht 263 owner), Joop van Wijk (son of Bep Voskuijl), Cara Wilson-Granat (pen friend of Otto Frank), Rolf Wolfswinkel (historian and professor, New York University), Elliot Wrenn (United States Holocaust Memorial Museum), Kees Jan van der Zijden (notary), Giora Zwilling (Arolsen Archives), and many, many others.