The Vermont medical examiner’s office said that the shooting death of a man who served with the Vermont Army National Guard has been ruled a homicide, and that he died of multiple gunshot wounds to his head, neck, and torso. Kryn Miner, 44, of Essex Junction, died early Saturday at his home. No arrests have been made. Miner was with the Guard during its 2010 deployment to Afghanistan. Major Christopher Gookin, a Vermont National Guard spokesman, said Miner held the rank of chief warrant officer 2 and was assigned to the headquarters company of the Guard’s 86th Infantry Brigade Combat Team.