No, not if it's a 22-250 like that post suggests, since the last paragraph of the article states;
"He recorded a narrative verdict of unlawful killing, adding that Rifleman Lincoln was shot by enemy fire. "He sustained a single gun shot wound to the head,' he said. 'This 5.56mm, U.S. manufactured round was not fired by friendly forces."
That might leave the possibility of a .223 nominal diameter [projectile] handload? I don't use .22-250. Is it .223 diameter projectile?