Following the prosecution's rebuttal case, the judge read the jury their initial instructions.

Court is then expected to break for lunch, with closing arguments currently scheduled for the afternoon.

The judge will then give the jury their final instructions before they begin deliberations.

The government rested its rebuttal case after a brief cross-examination of FBI special agent Erika Jensen, who testified about location and text message data relevant to the case.

Attorneys then gathered for another sidebar conference.

After a lengthy sidebar, overflow room cameras suddenly turned on to show prosecutors questioning a previous witness, FBI agent Erika Jensen, suggesting that the defense has rested its case and prosecutors are introducing a rebuttal case before the trial moves on to closing arguments.

If so, that would indicate that Hunter Biden did not testify in his own defense.

This morning's proceedings are underway.

Judge Maryellen Noreika began by reviewing with both parties motions by the defense to change proposed jury instructions.

The jury is expected to be brought back into court at 9 a.m. ET.

Hallie Biden, Hunter Biden's former romantic partner who is the widow of his brother Beau Biden, has taken the stand as the prosecution's next witness.

Prosecutors have said they expect her to testify about Hunter Biden's drug at the time of his gun purchase in October 2018.

Before gun store clerk Gordon Cleveland stepped off the stand, he testified that Hunter Biden did not exhibit any symptoms of drug or alcohol abuse when he purchased the gun at the center of the case.

When asked by defense attorney Abbe Lowell if Hunter Biden exhibited any symptoms at the time of his gun purchase, such as being "glassy eyed" or smelling of alcohol, Cleveland replied, "None at all."