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James Fields Jr. on trial for killing Heather Heyer in Charlottesville protests

CHARLOTTESVILLE, Va. -- Attorneys for both the prosecution and defense agree that James Alex Fields Jr. drove his car into a crowd of counterprotesters last year at a white nationalist rally in Charlottesvile, Virginia. Heather Heyer, 32, was killed in the incident.

But in their opening statements in Fields' trial Thursday, they disagreed about why he did it.

"This case isn't about what he did," prosecuting attorney Nina-Alice Antony said in her opening statement. "It's about what his intent was when he did it."

Fields is accused of plowing his Dodge Challenger into a crowd of counterprotesters during the August 2017 Unite the Right rally, killing Heyer and injuring several others. The incident followed a period of racially charged violence in Charlottesville and sparked national outrage, putting the country on edge.

The prosecution has alleged in court documents that Fields drove the car into the crowd with the intention of hurting people he targeted based on his bigoted views.

Prosecutors told the jury they'd present Instagram posts Fields posted in May 2017, two months before the Unite the Right rally, that they said depicted a car running into a crowd of people described as protesters.

But an attorney for Fields told prospective jurors this week that he acted in self-defense, according to CNN affiliate WVIR.

"Ms. Antony is correct. This is not a whodunit case," said defense attorney John Hill in his own opening statement. "This is not about who drove that car."

Hill described counterprotesters as acting hostile towards Fields, and claimed that his client saw one with a gun in his hands. Hill added that Fields said "he was scared to death" when he was apprehended by police.

"It is our hope at the end of the trial you'll find Fields not guilty of the charges," Hill said.

Attorneys offered their opening statements after the jury in Fields' was finalized Thursday morning. Judge Richard Moore has allotted 18 days for the trial.

Heyer was 'a great person,' witness says

Fields is charged with first-degree murder in the death of Heyer, a local paralegal who attended the rally to speak out against white supremacy and racism. Her friends and family have said she died for her beliefs. Heyer's mother, Susan Bro, told CNN's Jason Carroll she would be at court every day and wanted to see all the evidence against Fields come out.

The state called its first two witnesses on Thursday. Both were men who were nearby when Fields drove his car into the crowd.

The first was Michael Webster, who went to downtown Charlottesville that day to eat lunch with his girlfriend. Webster told the court they saw a silver Dodge Challenger backing up toward the downtown mall.

Then his girlfriend gasped, Webster said, as he heard a car accelerating.

"I thought, 'Oh my god. He's driving into the crowd,'" Webster said. After the crash, Webster ran over to help people onto the sidewalk, shortly before the Challenger went back up 4th Street in reverse.

Webster acknowledged on cross examination that he didn't actually see the moment of impact.

The second witness called by the state was Marcus Martin, who's seen in the iconic Pulitzer Prize-winning photograph of the moment of impact, taken by a photographer from The Daily Progress newspaper.

Martin was in the crowd and was looking at his phone up until he heard "tires screech," he told the court. Both his tibia and his ankle were broken as a result of the crash, and his foot required emergency surgery. Doctors put two screws in his left ankle, he said, and he wore a boot for 8 months.

Martin also said that he and his wife -- who was his fiancée at the time -- knew Heather Heyer, and they were all together at the protest.

When Antony asked him to describe Heyer, Martin grew emotional, and told the court she was "a great person."

Driver faces federal hate crime charges

Fields also faces five counts of malicious wounding, three counts of aggravated malicious wounding and one count of failing to stop at an accident involving a death.

Separately, he is charged with hate crimes in a 30-count federal indictment. Prosecutors in that case allege Fields espoused white supremacist ideals and denounced minorities on social media before traveling to Virginia for the rally.

The 21-year-old has pleaded not guilty to the federal charges. It's unclear whether he has entered a plea to the state charges, though a trial would not likely be necessary if he had pleaded guilty.

His attorney, Denise Lunsford, did not return an email seeking comment. Fields is being held without bail in the Albemarle/Charlottesville Regional Jail.

Jury selection 'most complicated,' judge says

Attorneys completed their questioning of prospective jurors on Wednesday. A panel of 16 jurors -- including four alternates -- was seated when court resumed Thursday morning.

The jury is made up of nine women and seven men, one of whom is black. The rest of the jury is white.

Moore called it "the most complicated jury selection" he has participated in over 37 years as an attorney and six as a judge.

He acknowledged Wednesday that someone is conducting robocalls related to the case and warned prospective jurors to hang up if they receive one.

Moore previously denied Fields' defense team's request to move the trial out of Charlottesville, according to CNN affiliate WVIR. Fields' lawyers had argued that the community is too connected to Heyer's death and other violence from the Unite the Right rally to provide a pool of objective jurors.

"Despite careful (jury selection)," Fields' defense team argued in a motion, "potential jurors' resilience in their attempts to move forward may easily develop into prejudice against Fields, a prejudice that will be unlikely recognized by those affected and difficult, if not impossible, to ferret out."

The prosecution rebutted that pretrial publicity is no reason to change the venue.

The trial is expected to bring intense interest. In anticipation, Moore has established several rules and made arrangements to accommodate reporters and the public. He also has banned bags, signs and electronic devices from the courthouse.