The defense rested without calling Hunter Biden to the witness stand. Defendants are not required to testify and are often advised by lawyers not to do so because it opens them up to grilling by prosecutors on cross-examination.

Hunter Biden is charged with three felonies stemming from the October 2018 purchase of a gun he had for about 11 days. Prosecutors say he lied on a mandatory gun-purchase form by saying he was not illegally using or addicted to drugs.

He has pleaded not guilty and has accused the Justice Department of bending to political pressure from former President Donald Trump and other Republicans to bring the gun case and separate tax charges after a deal with prosecutors fell apart last year. Hunter Biden has said he has been sober since 2019, but his attorneys have said he did not consider himself an "addict" when he filled out the form.

Hunter Biden hugged his uncle James Biden before entering the Wilmington, Delaware, courthouse Monday. First Lady Jill Biden arrived shortly after and was seated in the front row of the courtroom with other family members, including James, Hunter's sister Ashley and the president's sister, Valerie Biden Owens.

As court began, the two sides argued over instructions that will be given to the jury before deliberations. The lawyers also discussed how jurors can request to see certain physical exhibits, including the gun, in the jury room.

The case has put a spotlight on a turbulent time in Hunter Biden's life after the death of his brother, Beau, in 2015.

Hunter Biden's struggles with addiction before getting sober more than five years ago are well documented. But defense lawyers argue there's no evidence he was actually using drugs in the 11 days that he possessed the gun. He had completed a rehab program weeks earlier.

Jurors have heard emotional testimony from Hunter Biden's former romantic partners and read personal text messages. They've seen photos of him holding a crack pipe and partly clothed, and video from his phone of crack cocaine weighed on a scale.

His ex-wife and two former girlfriends testified for prosecutors about his habitual crack use and their failed efforts to help him get clean. One woman, who met Hunter Biden in 2017 at a strip club where she worked, described him smoking crack every 20 minutes or so while she stayed with him at a hotel.

Jurors have heard him describe at length his descent into addiction through audio excerpts played in court of his 2021 memoir, "Beautiful Things." The book, written after he got sober, covers the period he had the gun but doesn't mention it specifically.

A key witness for prosecutors is Beau's widow, Hallie, who had a brief troubled relationship with Hunter after his brother died of brain cancer. She found the unloaded gun in Hunter's truck on Oct. 23, 2018, panicked and tossed it into a garbage can at a grocery store in Wilmington, where a man inadvertently fished it out of the trash.

"I didn't want him to hurt himself, and I didn't want my kids to find it and hurt themselves," Hallie Biden told jurors.

From the time Hunter returned to Delaware from a 2018 trip to California until she threw his gun away, she did not see him using drugs, Hallie told jurors. That time period included the day he bought the weapon. But jurors also saw text messages Hunter sent to Hallie in October 2018 saying he was waiting for a dealer and smoking crack. The first message was sent the day after he bought the gun. The second was sent the following day.

The defense has suggested Hunter Biden had been trying to turn his life around at the time of the gun purchase, having completed a detoxification and rehabilitation program at the end of August 2018.

"There is no evidence of contemporaneous drug use and a gun possession," defense lawyer Abbe Lowell wrote in court papers filed Friday. "It was only after the gun was thrown away and the ensuing stress ... that the government was able to then find the same type of evidence of his use (e.g., photos, use of drug lingo) that he relapsed with drugs."

Hunter Biden's daughter Naomi took the stand for the defense Friday, telling jurors about visiting her father while he was at a California rehab center weeks before he bought the gun. She told jurors that he seemed "hopeful" and to be improving, and she told him she was proud of him. As she was dismissed from the stand, she paused to hug her dad before leaving the courtroom.

President Joe Biden said last week that he would accept the jury's verdict and has ruled out a pardon for his son. After flying back from France, President Biden was at his home in Wilmington for the day and was expected in Washington in the evening for a Juneteenth concert. He was scheduled to travel to Italy later this week for the Group of Seven leaders conference.

Last summer, it looked as if Hunter Biden would avoid prosecution in the gun case altogether, but a deal with prosecutors imploded after U.S. District Judge Maryellen Noreika, who was nominated to the bench by Republican former President Donald Trump, raised concerns about it. Hunter Biden was subsequently indicted on three felony gun charges. He also faces a trial scheduled for September on felony charges alleging he failed to pay at least $1.4 million in taxes over four years.

If convicted in the gun case, he faces up to 25 years in prison, though first-time offenders do not get anywhere near the maximum, and it's unclear whether the judge would give him time behind bars.

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Richer reported from Washington.