Son: Jailed Iranian TV anchor to appear before US grand jury

Son: Jailed Iranian TV anchor to appear before US grand jury
This undated photo provided by Iranian state television's English-language service, Press TV, shows its American-born news anchor Marzieh Hashemi. On Friday, Jan. 18, 2019, Iran's state-run English-language channel reported that its American anchorwoman detained in the U.S. will appear in court in Washington. Press TV said Marzieh Hashemi's court appearance is Friday. (Press TV via AP)

WASHINGTON (AP) — The son of an American-born anchor for Iran’s state television broadcaster says his mother will appear before a U.S. grand jury.

Hossein Hashemi tells The Associated Press that his mother, Marzieh Hashemi, is being taken to court in Washington, D.C., on Friday.

He has said Marzieh Hashemi was taken into custody by federal agents on Sunday in St. Louis and then was transferred to Washington. He has said she’s been jailed as a material witness, though it’s unclear for which case.

She hasn’t been charged with a crime.

Federal law allows judges to order a witness to be arrested and detained if the government can prove his or her testimony has extraordinary value for a criminal case and he or she would be a flight risk and unlikely to respond to a subpoena.