The salacious details of Biden’s private life have made him a fixture of the tabloids and an irresistible target for Republicans. But Lowell,banging the podium for emphasis,urged jurors to focus on the nuances of the case,and emphasised that while Biden was addicted to crack cocaine from 2015 to 2019,he had sporadic periods of sobriety when he could credibly claim to be drug-free. The law,he said,was not intended to punish “mistakes”.

Lowell,speaking for about 45 minutes,drew a sharp distinction in the handling of the gun as well as other stand-alone prosecutions of violations on a gun application,which often entail violence or other criminal activity. After Biden bought the gun,he never loaded it,never removed it from its lockbox in his truck,and never used it during the 11 days he owned it,Lowell said.

It was his girlfriend at the time,Hallie Biden,who found the gun,removed it from the box,placed it in a pouch that contained drug residue and tossed it in a trash can at a nearby grocery store.

And Hunter Biden was not happy she did so.

“Did you take that from me,Hallie?” Hunter Biden texted after learning she had taken the gun from the lockbox because she feared he might kill himself with it. “Are you insane. Tell me now. This is no game.”

Later,after he was contacted by local police,he suggested that the weapon might be discovered by the FBI,which he referred to using an expletive.

“It’s hard to believe anyone is that stupid,” he added.

Hallie Biden is expected to be called as a witness for the prosecution. Lowell suggested he might sharply question her version of events on cross-examination.

For the first two days of the trial,Hunter Biden’s family watched attentively from the row of seats right behind him. At one point,when his lawyer spoke about support from his wife,Melissa Cohen Biden,in helping him maintain his sobriety,Hunter Biden turned around to look at them.

If prosecutors began with a focused outline of their case,their presentation soon slowed with the testimony of their first witness,an FBI agent who served as a kind of docent. The agent,Erika Jensen,guided the jury through exhibits and played extended audio clips of Hunter Biden reading chapters ofBeautiful Things,his autobiography,detailing his addiction to crack at the time he bought the gun.

The sound of Biden’s voice,piped in through speakers as he listened tight-lipped,was jarring and it initially transfixed the courtroom. But after about half an hour,attention drifted,even,it seemed,among prosecutors.

At one point,Hines asked Jensen,“We’re still in chapter eight,right?”

The trial,which is expected to last about a week,promises to be an excruciating personal ordeal for the Biden family.

Hines said prosecutors planned to summon Hallie Biden and another woman Hunter Biden was romantically involved with,Zoe Kestan,in addition to his former wife,Kathleen Buhle,who is likely to testify first.

He also plans to call Gordon Cleveland,an employee at the Delaware gun store where Hunter Biden bought his weapon,and two expert witnesses who will testify on drug residue and other forensic evidence.

The purpose is to provide witness testimony to fill in gaps left by dozens of documents and texts – some extracted from Hunter Biden’s lost laptop computer – which the government presented to the jury on Wednesday (AEST).

Jensen painstakingly posted texts from Hunter Biden and the people who sold,or obtained,crack for him on screens throughout the courtroom,painting a picture of a desperate man who seemed to spend every waking minute in mid-2018 hunting for drugs.

She juxtaposed those patterns with his cash withdrawals that averaged a staggering $US50,000 ($75,000) a month that autumn,to connect his runaway spending to his out-of-control addiction. That included a $US5000 withdrawal on October 12,2018,the day he bought the weapon.

Lowell,who began his cross-examination of the FBI agent as the session neared a close,seized on the government’s lack of evidence,such as frantic texts to his dealers around the time of the gun purchase,to prove the withdrawals were linked to drug deals.

If the government was using more than 60 text messages between Hunter Biden and someone else on February 26,2019,to establish that he was using drugs,there was nothing like that in October,supporting the defence’s argument that Biden was not an unlawful user of drugs when he filled out the federal form to purchase his gun.

Biden is charged with three felonies:lying to a federally licensed gun dealer,making a false claim on the federal firearms application used to screen applicants and possessing an illegally obtained gun in October 2018. He faces a separate trial in Los Angeles later this year on tax charges.

If convicted on the three gun-related charges,Biden could face up to 25 years in prison and $US750,000 in fines. But non-violent first-time offenders who have not been accused of using the weapon in another crime rarely receive serious prison time for the charges.

This article originally appeared inThe New York Times.