SAVANNAH, Ga.—Court officials preparing for the trial of three men charged with chasing and killing Ahmaud Arbery mailed jury duty notices to 1,000 people, a huge number that illustrates the challenge the judge and attorneys face in finding impartial jurors for a case that sparked a national outcry. Jury selection is scheduled to begin Monday in coastal Georgia in the murder trial of Greg and Travis McMichael, a white father and son who armed themselves and pursued Arbery in a pickup truck after spotting the 25-year-old Black man running in their neighborhood. Also standing trial is William “Roddie” Bryan, a neighbor who joined the chase on Feb. 23, 2020, and took cellphone video of Travis McMichael shooting Arbery at close range with a shotgun. Attorneys hope to try the case in Glynn County, where Arbery and the three defendants lived within 2 miles (3.2 kilometers) of each other, despite the …