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.

Prosecutors called Hunter Biden's ex-girlfriend Zoe Kestan to the stand, where she testified that she first met him at a Manhattan strip club in late 2017 and dated him for several months afterward.

Kestan bore witness to Hunter Biden's use of crack "every 20 minutes or so."

Kestan, who testified under subpoena and with an immunity agreement with prosecutors, recalled that Hunter Biden's demeanor didn't change after he used crack.

She described him as "cognizant and coherent."

"I remember thinking to myself that there was no change in his behavior," she said. "Nothing had changed, he was the same charming person."

Prosecutors showed jurors photos from Kestan's phone that showed crack pipes strewn about hotel rooms where they stayed.