Federal officials have reportedly interviewed approximately 100 witnesses in their criminal investigation of President Joe Biden’s handling of classified material while he was vice president in the Obama administration and while he was a U.S. Senator for the state of Delaware.

ABC News reported that the interviews have mainly focused on former Biden aides and military aides and the procedures that were used when handling the material. Interviews have been conducted as recently as last week and some of the witnesses have been asked to return for additional questioning, the report said.

The investigation — which is being led by Special Counsel Robert Hur, a Trump-era U.S. attorney — has “apparently uncovered instances of carelessness from Biden’s vice presidency,” the report said, echoing the type of language that was used in the FBI’s decision to not charge Hillary Clinton over her handling of classified material during the 2016 presidential election.

The report said that the witnesses who have been interviewed have made it seem as though “the improper removal of classified documents from Biden’s office when he left the White House in 2017 was more likely a mistake than a criminal act.”

The report noted, though, that the special counsel has not reached a conclusion about whether Biden will be charged and the investigation is not over.

Secretary of State Antony Blinken, who was an aide for Biden, was one the people reportedly interviewed by investigators.

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The report added:

Investigators have shown witnesses email chains dating back to at least 2010 and asked for context about those exchanges, sources said. Witnesses have also been pressed about the use of cabinets and safes, sources said. … Sources said investigators are asking witnesses, especially former military aides, granular questions about internal procedures for handling classified materials, apparently seeking to understand the minutiae of how the vice president obtained, consumed, and discarded classified briefing materials.

It has already been reported that some of the documents that were recovered by investigators during a search of Biden’s home were from his time in the U.S. Senate.

The special counsel investigation into Biden has similarities and differences from the special counsel investigation into former President Donald Trump’s handling of classified material.

The biggest difference between the two cases is that when classified material was found at Biden’s office and home, investigators were contacted, the documents were recovered, and Biden appears to have complied with the investigation whereas Trump is accused of obstructing his investigation.

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The CIA is planning to unleash an artificial intelligence tool to give analysts better access to sort through vast amounts of public information, according to a Bloomberg report.

Randy Nixon, director of the CIA’s Open-Source Enterprise division, told the outlet that the ChatGPT-style tool will likely be used by all 18 U.S. intelligence agencies, like the National Security Agency (NSA), FBI, and various military agencies to find clues through primary information sources.

“We’ve gone from newspapers and radio, to newspapers and television, to newspapers and cable television, to basic internet, to big data, and it just keeps going,” Nixon said. “We have to find the needles in the needle field.”

Nixon said once an agency gathers such information, the analyst could start chatting and asking questions of the machines to provide sourced answers.

“Our collection can just continue to grow and grow with no limitations other than how much things cost,” he said.

Mass gathering of information from U.S. agencies comes as China has pledged to become the global leader in artificial intelligence by 2030, which has raised concerns over its use of AI in several surveillance systems to track civilians within the nation and worldwide.

FBI Director Christopher Wray accused China in July of stealing “more of our personal and corporate data than every nation big or small, combined,” warning that the Chinese government poses a “double” threat regarding AI, according to The Register.

China “has already spent years stealing both our innovation and massive troves of data that turns out to be perfect for training machine learning models,” Wray said. “And now they’re in a position to close the cycle, to use the fruits of their widespread hacking to power with AI even-more-powerful hacking efforts.”

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NSA’s Jason Wang, technical director for the Computer and Analytic Sciences Research Group, said in 2021 that AI would play a central role in the Intelligence Community’s efforts to secure and defend U.S. networks.

“I think the next frontier for us is probably in the cybersecurity space,” Wang said. “There’s a lot of opportunity … to bring machines to this very low latency, highly dynamic problem in ways that really are not human-time kinds of responses.”

“[Cybersecurity] is a space where we’ve gotten [AI] efforts underway that I think we’d love to mature along with our partners,” he said.

Earlier this year, Bloomberg reported that NSA Research Director Gil Herrera said the intelligence community needs to “find a way to take benefit of these large models without violating privacy.”

The CIA drafted Nixon earlier this year as the new Open Source Enterprise director to “speed up the agency’s development in open source intelligence just as the field is causing increasing concern and sparking rivalry in Washington,” according to Intelligence Online.

Nixon told Bloomberg the scale of how much the U.S. collects has grown over the last 80 years to a level that can sometimes be “daunting” and unusable for consumers.

He added that the AI tool would allow analysts move to a process “where the machines are pushing you the right information, one where the machine can auto-summarize, group things together.”