CNN The Lead With Jake Tapper July 17, 2015 20:06:00
Absolute as he and his mother pay their respects to the four u.s. marines killed thursday. as the city grieved, law enforcement is seeking an answer to why this area college graduate went on a deadly rampage. his background is being examined. officials say they were not on their radar or in their data base. >> the shooter's situation is being treated as a terrorism investigation. >> reporter: officials are interviewing friends, searching his family's home and looking at his social media footprint for any links to terrorist groups. >> we're looking at any foreign travel he may have performed. >...