CNN —Former acting Director of National Intelligence Richard Grenell testified Thursday before a grand jury investigating Donald Trump’s handling of classified documents. Grenell was subpoenaed to testify in special counsel Jack Smith’s ongoing criminal probe, according to a source familiar with the matter. While serving in the administration, Grenell embarked upon an effort to declassify documents that were of interest to Trump because the then-president believed they could delegitimize the Russia investigation. Grenell remained in Trump’s orbit even after the former president left office and has been seen at his Mar-a-Lago resort as recently as last week. Grenell has also commented publicly about Trump’s retention of classified documents and the former president’s still-unproven claims that the materials he kept had been declassified.

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