(CNN) — Federal investigators seized multiple documents labeled “secret,” “confidential,” and “classified,” including some about weapons of mass destruction, during the late August search of the office of President Donald Trump’s former national security adviser John Bolton, according to newly released court records that are part of an investigation into whether Bolton mishandled defense records.

The new details provide additional insight into what evidence federal investigators have collected as they look at possible criminal charges for Bolton, who became a political antagonist of Trump’s after he published a book in summer 2020 about how the president bungled several interactions with and about foreign governments.

A manuscript Bolton wrote for the book , titled “The Room Where I

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