FILE – In this Oct. 2, 2015, file photo, Douglas County Deputy Sheriff Greg Kennerly, left, and Oregon State Trooper Tom Willis stand guard outside the apartment building where alleged Umpqua Community College gunman Chris Harper Mercer lived with his mother in Roseburg, Ore. The deadly shooting last week has an eerie parallel with the massacre at Sandy Hook Elementary School that killed 20 pupils and six adult staff members in 2012. Like Adam Lanza, the gunman in the Connecticut massacre, Christopher Harper-Mercer was living a mostly solitary life with a mom who shared his fascination with firearms. (AP Photo/Rich Pedroncelli, File)