Former President Trump on March 18 in Tulsa, Oklahoma. Photo: Shane Bevel/NCAA Photos via Getty Images

A federal appeals court ordered former President Trump's defense attorney to testify Friday before the grand jury investigating the former president's handling of classified documents at Mar-a-Lago, CNN reports.

Why it matters: Evan Corcoran had previously testified but declined to answer some questions, citing attorney-client privilege. But a federal judge found that Trump knowingly and deliberately misled Corcoran in furtherance of a crime — triggering the "crime-fraud" exception to attorney-client privilege.