Authorities are saying troopers who shot and killed rancher LaVoy Finicum, one of an armed group that occupied the Malheur National Wildlife Refuge for several weeks, were justified in their actions. They say the officers believed Finicum was reaching for a loaded gun at the time. Harney County District Attorney Tim Colahan Tuesday said Finicum alone is responsible for what happened.  Also announced Tuesday:  the Department of Justice is investigating FBI agents who were at the scene who might have fired shots during the incident and failed to report it.