As part of the newly-opened enquiry, a specially developed algorithm will scour reams of documents from the period. The master database of info being fed to the AI includes lists of of Nazi collaborators, informants, historic documents, police records, and prior research. "Our software allows [the team] to search the data and visualize it new ways. This has already led to a few new traces," said Marius Helf, chief data scientist, Xomnia. "In the future, we plan to make the systems more intelligent, in the sense that it will be able to automatically connect persons, events, and places." Pankoke told Reuters that the software will be able to provide new leads and connections based on the trove of data "that a human in their lifetime might not be able to review."

The past several decades have seen numerous theories about Frank's betrayal floated about. It's been alleged by writers and investigators that the Frank family's neighbours, co-workers, or even the Gestapo's Jewish informants could have been behind the disclosure. Whereas, prior police investigations in 1948 and 1963 honed in on just one individual (warehouse manager Willem van Maaren) without probing other scenarios.

More recently, the Dutch Institute for War, Holocaust and Genocide Studies cast doubt on the speculation, claiming there was no conclusive evidence implicating any of the proposed suspects. And, just last year, the Anne Frank House in Amsterdam suggested that the raid on the residence could have been a mere coincidence. But, in both cases, the respective institutions stated that more investigation and evidence gathering was required.

The team working on the latest cold case are hoping that the public can provide some of that much-needed info. And, as a crowdfunded venture, the project is also relying on patrons to fund it to the tune of $5 million. The aim, however, is not to seek prosecution. Instead, the intention is to complete the case by August 4, 2019, which will mark 75 years since the arrest of Anne Frank.