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.

Hunter Biden's attorney, Abbe Lowell, questioned FBI Special Agent Erika Jensen about Hunter Biden's infamous laptop, which prosecutors entered into evidence yesterday, asking her on cross-examination if she had done an "analysis" of whether "data" or "content" of the laptop was "tampered with, added to, or subtracted" during the months that passed between when Hunter Biden dropped off the device for service in April of 2019 and when the FBI obtained it in December 2019.

Jensen said she had not.

Lowell also took aim at the numerous text messages prosecutors have presented as evidence of Hunter Biden's drug addiction in 2018 and 2019.

Lowell showed that only two messages among the several alluding to drug use, drug paraphernalia, and drug purchases occurred during October of 2018 -- the period during which Hunter Bidden procured the firearm. The rest were either other months before the incident or months afterward, Lowell showed.

"You don't see any references … to baby powder?" Lowell asked Jensen, before ticking through other drug terms that appeared in the messages earlier in 2018 or later in 2019, including "chore boy" and "party favors."

Each time, Jensen replied "No."

Lowell also questioned Jensen about two messages Hunter Biden sent around the time of his gun purchase that did allude to drug use, one of them referring to an alleged drug dealer named "Mookie" and other referencing "smoking crack on a car" in Wilmington. Lowell sought to establish that Jensen had no firsthand knowledge about the contents of the messages.

"Do you know if there is a person named Mookie?" Lowell asked.

"No," Jensen replied.

"Do you know if he was on a car smoking crack?" Lowell asked later, referring to Hunter Biden.

"No," Jensen said.

Lowell subsequently ended his cross-examination of Jensen, and prosecutors undertook their redirect examination.