President Joe Biden's son Hunter Biden has been convicted by a jury of lying about his drug use to illegally buy a gun in 2018.
A jury in Wilmington, Delaware, federal court found him guilty on all three counts against him, making Hunter Biden the first child of a sitting US president to be convicted of a crime.
A verdict of the 12-member jury must be unanimous on each count.
The case was brought by US Department of Justice Special Counsel David Weiss, a Trump appointee.
Weiss has also charged Hunter Biden with three felony and six misdemeanor tax offences in California, alleging he failed to pay $1.4 million in taxes between 2016 and 2019 while spending millions on drugs, escorts, exotic cars and other high-ticket items.
Hunter Biden has pleaded not guilty to those charges. A trial is scheduled for 5 September in Los Angeles.
The Delaware trial included prosecution testimony by Hunter Biden’s ex-wife, former girlfriend and sister-in-law, who gave firsthand accounts of his spiraling addiction in the weeks before and after he bought the gun in October 2018.
Prosecutors also showed text messages, photos and bank records that they said showed Mr Biden was deep in the throes of addiction when he bought the gun and knowingly broke the law by answering "no" to being a drug user on a government screening form.
Biden’s lawyers sought to show he was not using drugs when he bought the gun and did not intend to deceive because he didn’t consider himself a drug user when he filled out the form.
The defence called Hunter Biden’s daughter, Naomi Biden, who testified that her father seemed to be doing well when she saw him shortly before and after he bought the gun.
The sentencing guidelines for the gun-related charges against Biden are 15 to 21 months, but legal experts say defendants in similar cases often get shorter sentences and are less likely to be incarcerated if they abide by the terms of their pretrial release.
The jury met for about three hours over two days before reaching a guilty verdict.
Hunter Biden did not take the stand during the one-week trial held in the Biden hometown of Wilmington, Delaware.
First Lady Jill Biden attended several days of the trial. The president did not, but said he and Jill were "proud" of their son.
"As the President, I don't and won't comment on pending federal cases, but as a Dad, I have boundless love for my son, confidence in him, and respect for his strength," President Biden said in an earlier statement.
The proceedings have complicated Democrats' efforts to keep the election focus on Trump, the first former president ever to be convicted of a crime.
Drug addiction
In addition to being a political distraction, Hunter Biden's legal woes have reopened painful emotional wounds for the family from his time as a drug addict.
His brother Beau died from cancer in 2015, and his sister Naomi died as an infant in a 1972 car crash that also killed their mother, Neilia, Joe Biden's first wife.
The Yale-trained lawyer and lobbyist-turned-artist was charged with falsely stating when buying a .38 caliber revolver in 2018 that he was not using drugs illegally.
He was also charged with illegal possession of the firearm, which he had for just 11 days in October of that year.
The president's son, who has written unsparingly about his addiction, claimed that at the time he bought the revolver he did not consider himself to be an addict.
Hunter Biden has long been the target of hard-right Republicans, and Trump allies have investigated him at length in Congress on allegations of corruption and influence-peddling. No charges have ever been brought.
Hunter Biden's business dealings in China and Ukraine have also formed the basis for attempts by Republican lawmakers to initiate impeachment proceedings against his father. Those efforts too have gone nowhere.
The White House has said there would be no presidential pardon for Hunter Biden.
