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.

Hunter Biden has arrived at the courthouse for Day 6 of his federal gun trial, accompanied by his wife Melissa Cohen Biden.

First lady Jill Biden arrived shortly afterward.

President Joe Biden's brother James Biden and sister Valerie Biden also arrived.

The two waited outside until the court opened at 8 a.m. ET.

As the second week of Hunter Biden's gun trial gets underway this morning, defense attorneys will confront their most consequential decision: whether to put their client on the witness stand.

To allow Hunter Biden to testify in his own defense would carry myriad risks, as the president's son would likely face a grueling cross-examination from a prosecution team that has shows itself adept at eliciting testimony supporting their central contention in the case -- that Hunter Biden was addicted to drugs at the time he purchased the handgun at heart of the case.

Jurors witnessed that on Friday, when Naomi Biden, the 30-year-old daughter of Hunter Biden, struggled to explain text messages she sent her father in October 2018 after he had purchased the gun -- in which she seemed to express concern about his addiction, despite testifying moments earlier about how "great" her father seemed at the time.

If Hunter Biden decides not to take the stand, jurors could possibly have the case by the end of the day, after closing arguments and jury instructions.

Court is scheduled to get underway earlier than usual today, at 8:15 a.m. E.T.

In the first exhibits presented in the government's case, prosecutors played excerpts from the audiobook of Hunter Biden's 2021 memoir "Beautiful Things" -- in which jurors heard in his own words about some of the most personal low points of his yearslong addiction to crack cocaine.

FBI Special Agent Erika Jensen, the government's first witness, introduced about a dozen audio excerpts played out over an hour, as Hunter Biden's voice boomed over the courtroom's loudspeakers while his stepmother, first lady Jill Biden, and several other members of his family sat in attendance.

"I used my superpower of finding crack cocaine anytime, anywhere," Hunter Biden said of the year 2018 -- the same year he purchased the gun that prosecutors say he lied to get. The audio contained passages in which he spoke about the darkest and most dangerous moments of his addiction -- at one point doing cocaine in the bathroom while on a graduation trip with his daughter. .

Jill Biden and her daughter Ashley Biden sat shoulder-to-shoulder as the clips played out, at times leaning their heads against one another. At one point, as Hunter Biden's voice was heard describing a raucous 12-day bender in Los Angeles, Jill Biden lifted her left arm and draped it around Ashley's shoulders.

A person sitting with the family told ABC News they were both "fighting off tears."

Hunter Biden, for the most part, stared intently into the nearby monitor displaying the book's contents, at one point slightly nodding along as he reheard some of his most painful struggles. The jurors appeared largely engaged, with many taking notes and looking up at the screen to follow along.