BRUNSWICK, Ga. (AP) — Opening statements began Friday in the murder trial of three white men charged in the shooting death of Ahmaud Arbery, with a prosecutor telling jurors that faulty assumptions led them to chase down the 25-year-old Black man. Arbery’s killing was largely ignored until a leaked cellphone video stirred outrage that deepened a national reckoning over racial injustice.

FILE – In this Feb. 23, 2021, file photo, Ahmaud Arbery’s father, Marcus Arbery, bottom center, listens to Jason Vaughn speak during a memorial walk and candlelight vigil for Ahmaud at the Satilla Shores development in Brunswick, Ga. Arbery’s son was shot and killed while running in a neighborhood outside the port city. Jury selection in the case is scheduled to begin Monday, Oct. 18. (AP Photo/Stephen B. Morton, File)

Greg McMichael and his adult son, Travis McMichael, armed themselves and pursued Arbery in a pickup truck as he ran through their neighborhood just outside the Georgia port city of Brunswick on Feb. 23, 2020. A neighbor, William “Roddie” Bryan, joined the chase and recorded graphic video of Travis McMichael shooting Arbery three times with a shotgun.

“All three of these defendants did everything they did based on assumptions — not on facts, not on evidence,” prosecutor Linda Dunikoski told the jury as the trial began Friday morning. “And they made decisions in their driveways based on those assumptinos that took a young man’s life.”

Georgia’s response to the killing has become part of a broader effort to address racial injustice in the criminal legal system after a string of fatal encounters between police and Black people such as George Floyd in Minnesota and Breonna Taylor in Kentucky.

Superior Court Judge Timothy Walmsley swore in the disproportionately white jury Friday before proceedings began. All three defendants are standing trial together, charged with murder and other felony counts.

Arbery had been dead for more than two months before the McMichaels and Bryan were charged and jailed last year. Greg McMichael, a retired investigator for the local district attorney, told police the men were trying to stop Arbery because they suspected he was a burglar. Security cameras had recorded him entering a nearby house under construction.

Greg McMichael said his son killed Arbery in self-defense after Arbery attacked with his fists and tried to take Travis McMichael’s gun.

CORRECTS THE YEAR OF ARBERY’S SLAYING TO 2020, NOT 2021 – William “Roddie” Bryan, right, listens to his attorney Kevin Gough, left, during a motion hearing at the Glynn County Courthouse, Thursday, Nov. 4, 2021, in Brunswick, Ga. Bryan, Greg McMichael and his son, Travis McMichael, are charged with the February 2020 slaying of 25-year-old Ahmaud Arbery. (AP Photo/Stephen B. Morton, Pool)

Prosecutors say Arbery was merely out jogging, was unarmed and had committed no crimes in the neighborhood. When Bryan’s video of the killing leaked online in May 2020, the Georgia Bureau of Investigation took over the case from local police. GBI agents arrested the McMichaels the next day, and charged Bryan two weeks later.

The killing of Arbery has dominated news stories and social media feeds in Brunswick and surrounding Glynn County, a coastal community of about 85,000 people.

It took the judge and attorneys 2 1/2 weeks to select a jury. Nearly 200 people summoned to jury duty were questioned extensively about what they knew about the case, how many times they had seen the video and if they had any personal connection to Arbery or the defendants.

Controversy erupted on Wednesday, the final day of jury selection, when prosecutors objected to a final jury consisting of 11 whites and one Black juror. They argued that defense attorneys had cut eight potential jurors from the final panel because they are Black, which the U.S. Supreme Court has declared unconstitutional.

Travis McMichael listens to one of his attorneys during a motion hearing in the Glynn County Courthouse, Thursday, Nov. 4, 2021, in Brunswick, Ga. McMichael and his his father, Greg McMichael, and a neighbor, William “Roddie” Bryan, are charged with the February 2020 slaying of 25-year-old Ahmaud Arbery. (AP Photo/Stephen B. Morton, Pool)

The judge agreed there appeared to be “intentional discrimination,” but said Georgia law limited his authority to intervene because defense attorneys stated non-racial reasons for excluding Black panelists from the jury.

One juror, a white woman, was dismissed Thursday for medical reasons. Fifteen total panelists will hear the trial — 12 jurors plus three alternates. The judge has not given the races of the alternate jurors, and they were not asked to state their race in open court.

Court officials have said the trial could last two weeks or more.

If the defendants are acquitted, their legal troubles won’t be over. They have also been indicted on federal hate crime charges. A U.S. District Court judge has scheduled that trial to begin Feb. 7.