How was Anne Frank's hiding place during the Holocaust discovered, leading to her death in the Bergen-Belsen concentration camp at age 15? It's a mystery that still has no answer, despite years of investigation by her father Otto (the only member of the family to survive the Holocaust) and multiple scholars, notes Mental Floss. Now, a former FBI agent hopes to change that by opening a cold case review on the subject, the Guardian reports. Vince Pankoke and his team of 19 forensic experts are using new investigative techniques in an effort that will be filmed and chronicled online at the Cold Case Diary website, with results expected to be announced on Aug. 4, 2019, 75 years after Frank and her family were discovered. The investigators are using new methods to analyze large amounts of data developed over the last decade.
The Franks are widely believed to have been betrayed to the Gestapo, though the Anne Frank House museum published a study last year suggesting the family's discovery may have been by chance. Pankoke says he's uncovered documents relating to the Franks' arrest that were originally thought to have been destroyed; in reality they were shipped back to the US after World War II and recently declassified. The investigators will also be analyzing the Anne Frank House's archives, witness statements and interviews, and more. "We have found lists of names of Jews arrested having [been] betrayed, lists of informants, and names of Gestapo agents who lived in Amsterdam," Pankoke says. "There is so much information available," he tells a Dutch newspaper, per the New York Post. (The editor who discovered Anne's diary recently died.)