rAnne Frank may have been betrayed by a Jewish notary who became an informant for Nazi occupiers in order to save his own family's lives.u00a0u00a0It has long been theorized that the young Jewish diarist and her family were discovered by Gestapo officers in 1944 after a tip-off from an unknown informant but now au00a0retired FBI agent believes he has come up with the name of the man who revealed where the Franks were hiding:u00a0 Arnold van den Bergh.u00a0u00a0For the last six years, Vince Pankoke, who worked for the FBI for 30 years targeting Colombian drug cartels, has worked with a...