A 65-year-old man accused of shooting and killing a veteran highway patrol sergeant on a remote road in northeast Nevada had been on a frenzied quest for several weeks, saying that he thought coronavirus was spreading through water and sewer systems. John Leonard Dabritz, of the tiny mining town of Ruth, made an initial appearance Wednesday before a judge in Ely on murder, arson, vehicle theft and weapon charges in the March 27 killing of Sgt. Ben Jenkins in White Pine County.