The man accused of fatally shooting two Caldwell County teenagers June 9 later told his brothers he believed they were “aliens” disguised as firefighters that he had to kill.

Investigators found more than 50 9-millimeter shell casings near the bodies of 18-year-old Klayton Manning and his 16-year-old cousin Landin Robinson along Tenney Road in a rural area of the county.

Manning was a volunteer with the Southeast Caldwell County Volunteer Fire Department and the teens were riding in a ...