Jurors began deliberations late Monday afternoon in the federal gun trial of Hunter Biden, who is charged with owning and possessing a firearm while he was a drug addict. They deliberated for about an hour before they were released for the day.

His lawyers opted not to call him to the stand, though last Friday they had raised the possibility that he would testify.

Prosecutors said in their closing argument Monday that the central issue is whether Hunter Biden was an unlawful user or addicted to a controlled substance when he purchased the firearm. They went over witness testimony, text messages, photographs, bank withdrawals and Hunter Biden’s memoir. Prosecutors acknowledged the evidence was very “personal,” ugly” and “overwhelming” but said it was “absolutely necessary” to prove his addiction.

Two of the three charges Hunter Biden faces are related to accusations that he made false statements on a federal gun form about his drug use, certifying he was not a user of or addicted to any controlled substance during a period when prosecutors allege he was addicted to crack cocaine.

He’s also been charged with owning the gun unlawfully, possessing the weapon for 11 days before Hallie Biden, with whom he was romantically involved, found and discarded it. Hunter Biden pleaded not guilty to the charges.