Still asking: Who betrayed Anne Frank?

With some apprehension, Edith Chutkow of Williamsburg agreed to be interviewed by Vince Pankoke, a former FBI agent. The filmed interview lasted five hours.

Pankoke’s bio identifies him as an FBI agent who tracked down kidnappers and fugitives, intercepted Colombian cocaine shipments, was a SWAT member, posed undercover as a yacht-owning high-roller and helped retrace the movements of the terrorists who perpetrated the 9/11 attacks.

After retiring from the FBI at 59, Pankoke decided to use his investigative training skills to solve one of the most infamous crimes of the 20th century: Who betrayed Anne Frank to the Nazis?

Pankoke became the leader of a team of 20 former...