Hunter Biden's daughter Naomi took the stand as the defense's third witness.

Jason Turner, an employee at the gun shop that sold Hunter Biden the Colt revolver at the center of the case, corroborated on the stand clerk Gordon Cleveland's earlier testimony of the sequence of events that occurred in the store when Hunter Biden filled out the ATF form and purchased the gun.

Turner, who appeared defensive and confrontational during some of his testimony, testified that he never spoke to Hunter Biden.

When shown the ATF Form 4473 that Hunter Biden filled out, Turner said Hunter Biden provided his car registration as an alternate form of ID because the passport he provided did not have an address.

The defense said in court papers filed earlier that confusion over how Hunter Biden's form of ID was recorded on the ATF form raised questions about "who wrote what on the form, and when."

When defense attorney Abbe Lowell, questioning Turner, highlighted the box on the form that asks for the type of alternate ID, it was blank.

"When I wrote that out, I wrote 'car registration,'" Turner said. "It's not there," he testified.

Lowell also pressed Turner on what he was doing after Hunter Biden's background check came back until the firearm was purchased.

"I would have put on my ritual tone and sat in a marble room," Turner said sarcastically.

Ron Palmieri, the owner of the gun store, then took the stand.

As Hunter Biden's defense case gets underway, two more members of the Biden family have entered the courthouse: Naomi Biden and James Biden.

Naomi Biden is the daughter of Hunter Biden and granddaughter of President Joe Biden.

James Biden is Hunter Biden's uncle and President Biden's brother, who Hunter's attorney told the jury during opening statements paid for some of Hunter Biden's rehab and lived with him briefly afterward.

Defense attorney Abbe Lowell previously suggested both James Biden and and Naomi Biden could take the stand for the defense.

After jurors left the courtroom for a break, defense attorney Abbe Lowell moved for an acquittal for by orally submitting a Rule 29 motion, citing constitutional challenges and an insufficiency of evidence.

Judge Maryellen Noreika indicated her skepticism at the longshot bid with a chortle as Lowell described the legal underpinnings of his motion.

"You're laughing," Lowell said, before joking that her "smile" suggested she was "likely skeptical."

Both Lowell and the judge agreed that one of his claims in particular was an "interesting concept."

Lowell then told the court that the first two witnesses he plans to call for the defense are Ronald Palimere, the owner of the gun shop where Hunter Biden purchased the Colt revolver at the center of the case, and Jason Turner, an employee of the store.

Defense attorney Abbe Lowell, in his closing argument, urged jurors to dispense with the government's "conjecture and suspicion" and find his client not guilty on all three counts.

"We have had Hunter's life in our hands" until now, Lowell said, referring to his legal team. "And now we have to give it to you."

Lowell repeatedly referred to prosecutors' case as a "magicians' trick" -- to "watch this hand and pay no attention to that one," as he said -- arguing that prosecutors failed to "fill in the gaps" about Hunter Biden's drug use around the time of his firearm purchase "because they don't have the proof."

Lowell also referred to prosecutors' strategy of showing Hunter Biden's pattern of drug use as an "accordion," meant to "compress" the timeline and make it seem to jurors that he was actively using drugs in October 2018, when he said on a government form that he was not addicted to drugs in order to purchase a Colt handgun.

The defense attorney also attacked some of the tactics prosecutors used, calling their treatment of Hunter Biden's daughter Naomi Biden "extraordinarily cruel" and saying that many of their questions and evidence were introduced with the intention of "embarrassing Hunter."

He also asked jurors to recall gaps in the recollections of Hunter Biden's then-girlfriend Hallie Biden, and suggested they should remember the immunity agreement she struck with prosecutors for her testimony.

"These are serious charges that will change Hunter's life," he said of the three felony charges the president's son faces, adding that "it's time to end this case."

Following Lowell's closing, the government was scheduled to have a short rebuttal, at which point the judge was to finish her jury instructions before the jury gets the case.