A Navajo Nation police officer was killed in a head-on accident on the reservation near Chinle Tuesday. DPS officials say Leandro Frank was on his way to Tsaile on a call when a vehicle approached him on Route 64. Officials say both cars tried to avoid each other, but collided head-on. Frank was pronounced dead at the scene. Governor Doug Ducey has expressed his condolences and ordered flags fly at half-staff in his honor Wednesday.