Judge Maryellen Noreika, in her initial instructions to jurors, explained how they are to apply the law to the facts of the case for the three criminal counts Hunter Biden faces.

"You must not attach any significance to the fact that the defendant did not testify," she read aloud in the courtroom, after the defense decided not to call Hunter Biden to the stand.

The judge defined "knowingly," the central term by which jurors must determine if Hunter Biden bought the gun at the center of the case "knowing" he was an addict or user of drugs, after he stated on the gun-purchase form that he was not.

Closing arguments are scheduled to begin at 12:05 p.m. ET, after which the judge will give the jury her final instructions and their deliberations will begin.

Closing arguments will begin at about noon ET after Hunter Biden chose not to testify in his federal gun case.

The defense rested without him taking the stand, after which prosecutors presented a brief rebuttal case, then the judge gave the jury their initial instructions.

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.

A member of the jury that found Hunter Biden guilty told ABC News after the verdict that the trial was a "waste of taxpayers' dollars."

"I just think he needs help. He needs rehab," the juror told ABC News regarding the defendant. "In my opinion, this is a waste of taxpayers' dollars. They should have fined him."

Asked what she thinks a fair sentence would be, the juror said, "I don't think that anyone who is a nonviolent drug addict should be in prison. Just fine him. We know he did something wrong. Just fine him. He needs help."

She said the jurors "worked together really well."

"Considering who his father is and the political climate in this country, it turned out better than I expected," she said. "There was no fighting in the jury room."

Judge Maryellen Noreika said before court ended that she would schedule a sentencing date in the next 120 days. Hunter Biden could face up to 25 years in prison, though legal experts believe he will not serve time as a first-time and nonviolent offender.

-ABC News' Mark Guarino