In addition to her unlawful entry and disorderly conduct charges previously filed, Riley Williams of Harrisburg, Pennsylvania now faces a federal theft charge and a charge of obstruction of an official proceeding.
The FBI has said a witness who claims to be an ex of Williams' said friends showed that person a video of Williams taking a laptop computer or hard drive from Pelosi's office during the breach of the U.S. Capitol by supporters of President Donald Trump.
The tipster alleged that Williams intended to send the device to a friend in Russia who planned to sell it to that country's foreign intelligence service, but that plan fell through and she either has the device or destroyed it, investigators said in court records. The FBI continues to investigate that claim.
Pelosi's deputy chief of staff, Drew Hammill, confirmed two days after the Capitol attack that a laptop used only for presentations had been taken from a conference room.
On Tuesday, Assistant U.S. Attorney Christian T. Haugsby argued Williams should not be released on bail pending trial, saying she might flee or try to obstruct justice.
U.S. Magistrate Judge Martin Carlson scheduled a preliminary hearing and consideration of bail for early Thursday morning. Williams' lawyer, Lori Ulrich, argued for her release and against a delay.
Williams' father, who lives in the Harrisburg suburb of Camp Hill, told local law enforcement that he and his daughter went to Washington on the day of the protest but didn't stay together, meeting up later to return to Harrisburg, the FBI said.
Lehigh Valley Man Arrested
A Lehigh County man also faces charges for his alleged involvement in the riot.
Twenty-nine-year-old Craig Bingert turned himself in Sunday.
The FBI said he worked with other rioters to shove a barricade into police officers.
He then helped them lift it up in an apparent attempt to break through the police line.