Between 2018 and 2024, according to the GAO report, "the FBI designated approximately 1,100 Type I/ll and 100 Type III assessments as SIMs." Those numbers included members of the news media, political candidates, political organizations and prominent members thereof, religious figures, academics, and (the largest category) public officials.

Here are takeaways from what the documents show about the FBI investigation and why U.S. authorities ultimately decided to close it without additional charges.

Feb. 18 has been a relatively quiet day, as the investigation into missing Nancy Guthrie continues. FOX 10's Ashlie Rodriguez has more on today's developments.

"I'm not going to sit in silence when others are attacking the innocent," said Pima County Sheriff Chris Nanos.