TUCSON, Ariz. (AP) — U.S. officials say that a man sought in the slaying of a Border Patrol agent in Arizona eight years ago has been extradited to the U.S. from Mexico.

Federal authorities said Tuesday that Heraclio Osorio-Arellanes will be arraigned in U.S. District Court in Tucson on Wednesday. Osorio-Arellanes had been in custody awaiting extradition since being arrested by Mexican authorities on April 12, 2017. 

Osorio-Arellanes is charged in the death of Border Patrol Agent Brian Terry, who was shot and killed Dec. 14, 2010 when he and other agents encountered a gang preying on smugglers north of Nogales, Arizona.

Three of six other defendants charged in the case have pleaded guilty and two were convicted following a jury trial. Another defendant has not yet been tried.