Kuhn said he was notified on the morning of Sept. 11 that the subpoena had been withdrawn.

Kuhn said that he was unsure why the grand jury was interested in his footage, but he speculated that federal prosecutors may wish to identify anti-fascist protesters who were present at the rally.

In 2016, a federal grand jury in the District of Columbia, indicted more than two hundred anti-fascist protesters (and two independent journalists) on federal rioting charges. Much of the evidence in those indictments came from seized video footage of the J20 protests.

“Under no circumstances would I comply with this, or any other, Grand Jury subpoena relating to people involved in social movements,” Kuhn said.

On a solidarity rally on the morning of Sept. 11 in Washington, D.C., Kuhn burned multiple copies of the subpoena.

William Miller, a public information officer at the U.S. Attorney’s Office for the District of Columbia, declined to comment on the subpoena.