Former White House adviser Stephen Miller was spotted leaving the US District Courthouse in Washington, DC, on Tuesday after reportedly being interviewed before the grand jury hearing evidence of former President Donald Trump’s alleged efforts to overturn the 2020 election. 

Miller, 37, was grilled for six hours by prosecutors working with special counsel Jack Smith as part of the Justice Department’s investigation into Trump’s role in the Jan. 6, 2021, riot at the Capitol Building, according to multiple outlets. 

CNN reports that Miller was likely probed about a phone call he had with Trump, 76, minutes before the “Stop the Steal” rally on the Ellipse. After the rally, Trump supporters stormed the Capitol Building as Joe Biden’s 2020 election win was being certified. 

Miller is the latest witness brought by Smith before the grand jury as part of his investigation into Trump’s actions on Jan. 6, 2021. 

Miller, who served as Trump’s former speechwriter and policy adviser, did not speak to reporters as he entered or exited the courthouse, according to reports.

Last month, DC District Court Judge Beryl Howell ruled that Miller, former Vice President Mike Pence, former White House Chief of Staff Mark Meadows and other ex-Trump officials must testify in the Justice Department’s probe of the 45th president. 

Trump appealed the ruling, but Howell’s order was upheld by the DC Circuit Court of Appeals last week. 

Former Vice President Mike Pence announced last week that he would testify before the grand jury and not appeal the ruling himself. 

Miller appeared before the grand jury back in November but declined to answer some questions from prosecutors citing executive privilege asserted by Trump, according to CNN.

When interviewed by House Jan. 6 committee investigators and asked about his conversation with Trump before the Ellipse rally, Miller also declined to share details. 

The DOJ’s special counsel is also investigating Trump over his mishandling of classified material upon leaving office.